Manx Aztec C86 v5.2a

2024-07-02 08:25:54 -07:00 · 2024-07-02 08:25:54 -07:00 · 1a1aaf034e
commit 1a1aaf034e
parent 7addaf4bad
506 changed files with 153213 additions and 0 deletions
--- a/v52a/Aztec_C86_User_Manual_Rel_1.05i_Jun83.pdf
+++ b/v52a/Aztec_C86_User_Manual_Rel_1.05i_Jun83.pdf
--- a/v52a/Aztec_C_MSDOS_4.10C_Commercial_Apr88.pdf
+++ b/v52a/Aztec_C_MSDOS_4.10C_Commercial_Apr88.pdf
--- a/v52a/BIN/AHEX.EXE
+++ b/v52a/BIN/AHEX.EXE
--- a/v52a/BIN/AI.EXE
+++ b/v52a/BIN/AI.EXE
--- a/v52a/BIN/ALN.EXE
+++ b/v52a/BIN/ALN.EXE
--- a/v52a/BIN/ALOC.EXE
+++ b/v52a/BIN/ALOC.EXE
--- a/v52a/BIN/AS.EXE
+++ b/v52a/BIN/AS.EXE
--- a/v52a/BIN/AZ2OMF.EXE
+++ b/v52a/BIN/AZ2OMF.EXE
--- a/v52a/BIN/AZ86.BAT
+++ b/v52a/BIN/AZ86.BAT
@ -0,0 +1,4 @@
+path %PATH%;c:\ntvdm\az86\bin
+set CLIB=c:\ntvdm\az86\lib\libs\
+set INCLUDE=c:\ntvdm\az86\include
+set AZTEC=c:\ntvdm\az86\bin
--- a/v52a/BIN/C.EXE
+++ b/v52a/BIN/C.EXE
--- a/v52a/BIN/CC.EXE
+++ b/v52a/BIN/CC.EXE
--- a/v52a/BIN/CGEN.EXE
+++ b/v52a/BIN/CGEN.EXE
--- a/v52a/BIN/CHANGES.AHX
+++ b/v52a/BIN/CHANGES.AHX
@ -0,0 +1,58 @@
+Changes to AHEX:
+
+1/16/92
+	- ahex was using wrong memory model for stricmp()
+
+	- when path was specified on file to be hexed, ahex generated an invalid
+	  name for a temporary file.
+
+	- cleaned up log of ahex messages.
+
+1/23/92
+	- added support to ahex for separation of binary output to odd and even
+	  bytes.
+
+1/27/92
+	- added support for splitting binary files into ROM-sized chunks.
+
+	- Got rid of the fluff reporting stuff - it got in the way too much!  It
+	  can be re-enabled by #define'ing MSDOS, if need be.
+
+	- Added warning:
+
+		WARNING: Segment '%s' in the input file not specified in order list.
+
+	  for when the -a or -s options are used and a segment is found which
+	  isn't on the list.  It does not warn about 0-length segments or the
+	  _bss segment, which should cut down on spurious warnings (however,
+	  spurious warnings of this type can still occur on occasion).
+
+3/5/92
+	I was angrered by ahex's poor design, and so sent devastating rains for 40
+	days and 40 nights to deluge the source code and render it unusable.
+	After the waters resided, a new ahex rose from the destruction, and lo!, it
+	was good.
+
+		- When in non-ICE mode, ahex acts like a mini-locator, locating
+		  segments and classes with ROM.
+
+		- Option syntax based on aloc syntax.
+
+4/9/92 ----------------------	Released v5.2a beta 1 ------------------
+
+8/14/92 conv_to_hex() *jd
+	ahex was outputting screwy data after putting out extended address record,
+	because counter not being reset.
+
+8/27/92 add_extension() *jd
+	ahex was not generating correct extension when input file specified a
+	path using dots (e.g. ..)
+
+8/27/92 conv_to_hex() *jd
+	ahex output extended addr record after each 65535 bytes, not 65536.
+
+8/27/92 conv_to_hex() *jd
+	ahex was not deleting its temporary file
+
+8/31/92 layout.c *jd
+	ahex did not properly handle segments whose memory address was 0
--- a/v52a/BIN/CHANGES.ALN
+++ b/v52a/BIN/CHANGES.ALN
@ -0,0 +1,85 @@
+Changes to ALN:
+
+10/12/91
+1) LNR would put out a bad .lnk file when it encountered static data
+(i.e., data declared with the 'static' keyword in C).  When the bad
+.lnk file was given to aloc, aloc would abort with a fatal error.
+
+2) LNR would abort if it was given more than ~17 files to link.
+
+3) In some situations LNR would put out a bad .lnk file if RDB debugging
+information was desired, which aloc would subsequently reject.
+
+10/22/91
+4) LNR would exit w/ an error if it encountered control characters in
+a -f file (including ^Z, which some editors put out at the end of a
+file).
+
+11/19/91 mapfile.c *jd
+	lnr was only outputting \n to map file, not \r\n. 
+	added code to pm_putchar to add the \r when passed \n.
+
+11/20/91 debug.c *mks
+	lnr was putting out bad index fields in the debugging records
+
+1/10/92 MWS
+	Changed name from lnr to aln to be consistent with the rest of the
+	ROM tools.  So, we've now got aln, aloc, and ahex.
+
+1/16/92 azpass2.c MWS
+	Modified expression fixup code so that SUB expressions with
+	two symbols will work.  i.e.:
+
+		Expr SUB
+            GBLSYM 0, endtbl
+            GBLSYM 1, ledxref
+
+	The only reason this works is because SUBS of this type always turn
+	out to be constants.  In other words, the #$%!@ assembler should be
+	doing this itself.
+
+2/10/92 pass1.h MWS
+	Modified 'Data_seg' segment definition to reserve 2 bytes at the beginning
+	of the Data group.  This makes it easier to catch NULL-pointer write
+	bugs, and also matches what ln does.
+
+4/9/92 ------------------	Released v5.2a beta 1 ---------------------
+
+8/26/92 omffile.c jd
+	changed omfinit() to compute acbp field in segdef records, so that
+	segment alignment codes work
+
+8/28/92 alnmain.c jd
+	When generating output file name from first input name that includes
+	a path having dots (e.g. ../foo.o), aln didn't generate correct output
+	name.
+
+9/3/92 pass1.h *jd
+	aln leaves 2 unused bytes at beginning of _data (aka dataseg) segment,
+	but wasn't adjusting size of segment for those bytes
+
+10/4/92 ------------------	Released v5.2a beta 2 ---------------------
+
+
+10/12/92 jd: link.h
+	aln was creating invalid fixup records, because it was creating LEDATA
+	records that were longer than the maximum 1024 byte length.
+
+10/12/92 jd: seglook()
+	aln was not gathering together segments in the same class, but this
+	is required by rdb (it expects all code symbols to be grouped together
+	in the .dbg file, followed by the data symbols). aloc could handle
+	this separation of segments, but not rdb.
+
+
+10/19/92 jd: getval()
+	aln was not correctly processing the DATAREF, CODEREF, and BSSREF
+	loader items, which are generated when sqz optimizes the object module
+	libraries.
+
+10/28/92 jd: omf_fixup()
+	aln was not generating the correct offset for a fixup record that
+	referenced the first data bytes of the previous LEDATA record
+
+11/10/92 jd: outrecord(), omf_fixup(), outbyte(), RecordAlmostFull()
+	Added code to flush omf record buffer when it's almost full
--- a/v52a/BIN/CHANGES.AS
+++ b/v52a/BIN/CHANGES.AS
@ -0,0 +1,23 @@
+Changes to AS:
+
+4/9/92 ------------- Released v5.2a beta 1 --------------------
+
+6/4/92 jd
+	changed EVEN directive to output NOP opcode instead of 0.
+
+8/3/92 jd
+	definition of record instance could not specify a number 
+	as a field override.
+
+9/10/92 jd: maktrm()
+	assembler was counting two fixups for the expr "seg myseg", where myseg
+	is a segment or group. Also for statement "dd myseg".
+
+9/23/92 jd: options
+	-o option didn't work when using -f option to generate OMF
+
+10/4/92 ---------------- Released v5.2a beta 2 ----------------------------
+
+10/5/92 jd: execvp()
+	Relinked 'as' to use fixed execvp() - previous execvp() didn't always 
+	correctly search all directories specified in PATH.
--- a/v52a/BIN/CHANGES.CC
+++ b/v52a/BIN/CHANGES.CC
@ -0,0 +1,111 @@
+Changes to CC:
+
+1/9/92 MWS
+	Added -x option to generate function prototypes in the compiler.
+	Look for references to the OutProtos flag to see the relevant code.
+
+1/12/92 MWS
+	Added -w option to generate preprocessed source file (i.e., it just
+	preprocesses the input file and writes out the result).  Look for
+	references to the OutPrep flag to see the relevant code.
+
+1/16/92 MWS
+	Added -f option to compiler to generate prototypes for static functions.
+	The -x option now generates prototypes only for non-statics.
+
+1/16/92 MWS
+	Kludged autoprototyping code to distinguish between INT and SHORT
+	types.  Look for OutProtos being OR'd with 4 in the code to see
+	what's going on.
+
+4/9/92 -------------- Released v5.2a beta --------------------------
+
+4/21/92 jd: print_asm_line() 
+	%% in inline assembler was trashing chrcls table.
+
+4/21/92 jd: makquest() and doif()
+	added checks for condition of type void for if() statement 
+	and ?: operator.
+
+9/8/92 jd: 
+	cc was not generating correct prototype for a function's union argument.
+
+9/9/92 jd: ptype() & declsym()
+	cc was not generating correct prototype for a function that returned
+	a long or ulong.
+
+	cc didn't generate correct prototypes when program was compiled to use
+	large data memory model.
+
+9/11/92 jd: cinit()
+	cc didn't allow static initializations like
+		long a = (long)"b";
+
+9/11/92 jd: multidef() refs&def
+	cc put out screwy msg for multi-defined symbols
+
+9/14/92 jd: pbstring()
+	__FILE__ macro was wrong if input filename had backslashes.
+
+9/14/92 jd: decllist()
+	cc didn't report error if struct or union had multidefined symbol.
+
+9/14/92 jd: options(), makcall()
+	Added -m option to issue warning if a function is called without a
+	prototype for it being in scope.
+
+9/15/92 jd: peek(), pushback(), token()
+	cc didn't accept "struct mystr far" but did accept "far struct mystr".
+
+9/15/92 cm: fixed earlier
+	cc didn't report error but generated bad code for:
+		void f(void);
+		...
+		if (f())
+			...
+
+9/15/92 jd: addfunc()
+	cc didn't report error for declaration of huge function, but generated
+	near calls to it. Now treating such decls as an error.
+
+9/15/92 jd: verror.c
+	error msg 157 applies to data as well as functions.
+
+9/16/92 jd: cinit()
+	Don't allow initialization of static ptr to auto:
+		m(){int i; static int *ip=&i;}
+
+9/16/92 cm: fixed earlier
+	cc gave error 86 "null dimension in array" for
+		typedef int arr[];
+
+9/17/92 jd: newfunc()
+	cc generated bad debug record for:
+		f(long){}
+
+9/23/92 jd: options(), etc
+	-o option didn't work when using +j option to generate OMF
+
+9/23/92 jd: bmain.c, cstat.c
+	Changed cc so that both -x and -f can be specified at once, to get
+	prototypes for both static and global functions.
+
+
+10/4/92 ---------------- Released v5.2a beta 2 ----------------------------
+
+
+10/5/92 jd: execvp()
+	Relinked 'cc' to use fixed execvp() - previous execvp() didn't always 
+	correctly search all directories specified in PATH.
+
+10/6/92 jd: cinit()
+	cc v4.10d allowed aggregate initializers to have nothing between the braces,
+	which allowed cc to do the correct thing for:
+		struct str { char a[5], b[5], c[5]} mystr = { {}, {}, "abc" };
+	The v5.2a cc did not allow this, in conformance with ANSI. The compiler
+	has been changed so that this is disallowed when in strict ANSI mode
+	(i.e. compiler with -ansi), and allowed otherwise.
+
+10/26/92 jd: newfunc()
+	when generating prototypes, cc did not correctly handle functions defined
+	using the new syntax (e.g. void f(int a){} instead of void f(a)int a;{} )
--- a/v52a/BIN/CHANGES.CG
+++ b/v52a/BIN/CHANGES.CG
@ -0,0 +1,53 @@
+Changes to CGEN:
+
+4/9/92 ---------- Released v5.2a beta 1 ---------------------
+
+9/2/92 trailer() *jd
+	Added +t option to force $$var's (used for far data items) into codeseg
+	instead of dataseg.
+
+9/11/92 starregs() *jd
+	Bad code generated for:
+		int a; huge struct mystr {int i,k,j;} *mp;
+		m() { a = mp->j; a = mp->i; }
+
+9/14/92 gencast() *jd
+	When a null ptr was cast from near to far, result was not null (it was ds:0)
+
+9/15/92 jd: outoper()
+	For the following:
+		(*(far void(*)())0x12345678L)()
+	cgen generated far call to 5678h, not 0x12345678.
+
+9/16/92 jd: genstr()
+	For some structure copying, cgen generated bad code, because it
+	always prepared right side first, even if left was more complex. 
+	Changed cgen to do hardest side first.
+
+9/16/92 jd: templ.inp
+	For addition of constant to a huge pointer, compiler wasn't generating
+	extrn references to $hadd. For inc of huge ptr, it wasn't generating
+	extrn ref to $hinx.
+
+
+10/4/92 ---------------- Released v5.2a beta 2 ----------------------------
+
+
+10/5/92 jd: execvp()
+	Relinked 'cgen' to use fixed execvp() - previous execvp() didn't always 
+	correctly search all directories specified in PATH.
+
+10/22/92 jd: EvalRightFirst()
+	For some expressions, cgen was dereferencing a null pointer, causing 
+	random areas of memory to be modified
+
+10/22/92 jd: gencast()
+	The check for a null pointer in a cast of a near pointer to far
+	does not always have to be done. cgen was modified so that if the
+	near pointer is guarenteed not to be null, the check is not done,
+	thus saving space.
+
+10/23/92 jd: outstatic()
+	cgen was putting near static uninitialized variables in the data
+	segment, not the bss segment, thus increasing the size of the data
+	seg.
--- a/v52a/BIN/CHANGES.HEX
+++ b/v52a/BIN/CHANGES.HEX
@ -0,0 +1,8 @@
+Changes to hex86:
+
+4/9/92 ------------- Released v5.2a beta 1 ------------------------
+
+5/10/92 jd
+	When generating a jump instruction at reset vector for system in which
+	odd bytes are in one set of ROMs and even bytes in another, HEX86
+	put the jump instruction at the wrong address
--- a/v52a/BIN/CHANGES.LN
+++ b/v52a/BIN/CHANGES.LN
@ -0,0 +1,10 @@
+Changes to LN:
+
+11/25/91
+	Linker was mixing calls to sbrk and malloc, resulting in linker incorrectly
+	reporting 'out of memory' error messages
+
+4/9/92 ---------- Release v5.2a beta 1 -----------------------
+
+10/2/92
+	One minor bug fixed related to parsing of command line arguments.
--- a/v52a/BIN/CHANGES.LOC
+++ b/v52a/BIN/CHANGES.LOC
@ -0,0 +1,28 @@
+Changes to ALOC:
+
+10/22/91
+	ALOC would exit w/ an error if it encountered control characters in
+	a -f file (including ^Z, which some editors put out at the end of a
+	file).
+
+11/19/91 mapfile.c *jd
+	aloc was only outputting \n to map file, not \r\n. 
+	added code to pm_putchar to add the \r when passed \n.
+
+4/9/92 --------------------	Released v5.2a beta 1 ---------------------
+
+8/14/92 getinfo.c *jd
+	aloc was incorrectly computing the address of _Uend.
+
+8/28/92 locmain.c jd
+	When generating output file name from first input name that includes
+	a path having dots (e.g. ../foo.lnk), aloc didn't generate correct output
+	name.
+
+
+10/4/92 --------------------	Released v5.2a beta 2 ---------------------
+
+10/9/92 jd: getinfo.c
+	+JUMP created reset code in segment named _RESET_CODE, but ahex was
+	looking for it in segment named RESET_CODE, so ahex was not correctly
+	positioning it in ROM.
--- a/v52a/BIN/CHANGES.MAK
+++ b/v52a/BIN/CHANGES.MAK
@ -0,0 +1,27 @@
+Changes to MAKE:
+
+1/5/89
+	changed stksiz.c:
+		increased stack size from 4kb to 6kb,
+		and decreased stack red zone size from 2kb to 1kb.
+		(customer was getting STACK OVERFLOW message)
+
+11/26/90 *jd
+	relinked make to use croot that treats quoted strings as a single arg.
+
+6/3/91 make.c *jd
+	allow rules that consist of just dependencies, no commands. e.g. a makefile
+	that is just
+		clib: hello.o
+
+4/9/92  --------------- Released v5.2a beta 1 ---------------------
+
+8/28/92 jd
+	make didn't correctly handle makefiles that ended in ctrl-z. Fixed bug
+	in c.lib and rebuilt make.
+
+9/9/92 jd
+	make wasn't testing for malloc failure.
+
+10/4/92  --------------- Released v5.2a beta 2 ---------------------
+
--- a/v52a/BIN/CHANGES.SDB
+++ b/v52a/BIN/CHANGES.SDB
@ -0,0 +1,102 @@
+8/19/90
+	token() wasn't handling macro expansion correctly. body must be
+	unget()-ed from last to first, not first to last.
+
+	bpchk() wasn't recognizing conditional breakpoints - setting Mptr
+	to condition doesnt cause gch() to get the condition's chars.
+
+?/?/91
+	added -a option to rwdb's 'lp' command, for loading absolute symbols
+
+7/16/91
+	added +i command to wdb and rwdb to allow stepping into int handler
+
+1/27/92 MWS
+	Changed default absolute Intel OMF file extension from ".omf" to
+	".loc", to match how other Aztec tools work.
+
+2/10/92 MWS \windpro\hype\src\dispnode.c
+	Changed hypertext system to look for an environment variable named
+	'AZTEC' to find help files.  It does this _last_, after all its other
+	gyrations.
+
+4/9/92 --------------- Released v5.2a beta 1 ----------------------------
+
+9/21/92 jd: woption.c
+	On some systems, mouse wouldn't go below line 25 when in 50-line mode.
+
+9/22/92 jd: reg_mod()
+	sdb didn't allow 'r' command to take parameter; e.g. "r ip=.4"
+
+
+9/22/92 jd: parse()
+	If typed-in command contained invalid expression, sdb displayed error
+	msg on user screen, not on sdb's screen.
+
+9/22/92 jd: draw_thumbs()
+	If mouse was in source or message window when command was typed, mouse
+	disappeared and didn't reappear until it was moved.
+
+9/25/92 jd: remote/monomf.c
+	When downloading omf file, rdb sent too many bytes.
+
+9/28/92 jd: wbpexpr.c
+	Counldn't set an Expression True breakpoint from dialog box.
+
+9/28/92 jd: wmemops.c
+	With multiple memory dump windows open, each one's 'set options' dialog
+	box showed same values, which were those set last.
+
+9/28/92 jd: getch()
+	Couldn't read in a program's macro (.mac) file or redirect command input
+	to a disk file.
+
+9/28/92 jd: remote/monexec.c
+	When rdb was loading a program's symbols in response to an 'ls' command,
+	it didn't load the program's macros; and when quitting it didn't save
+	the program's macros to a .mac file.
+
+9/28/92 jd: IsEGA()
+	To see if host system has EGA attached, rdb used peek() instead of 
+	hostpeek().
+
+9/29/92 jd: text(), int.asm, localint.asm, setjmp.asm, setjmp.h
+	Ctrl-Break handler wasn't supported.
+
+9/29/92 jd: fixup()
+	Changed debugger so that ctrl-break justs interrupts executing program,
+	without terminating it.
+
+9/30/92 jd: dbgcall()
+	sdb locked up when evaluating a function call: eg "e myfunc()"
+
+10/1/92 jd: ShowStats(), main(), cmdtab.c, etc
+	Added 'di' command to display info about sdb's heap usage.
+
+10/4/92 --------------- Released v5.2a beta 2 ----------------------------
+
+10/20/92 jd: OMFload(), loadexe()
+	Changed rdb so that when .loc or abs .exe program is downloaded to ROM
+	system, initial stack is set to area at top of monitor data. Previously,
+	.loc's initial stack was random and abs .exe's was 64k above _Dorg; when
+	monitor transfered control to user program by pushing info on this random
+	stack, random areas of memory were overwritten.
+
+
+11/3/92 jd: whelp.c wdbpro.c
+	sdb and rdb couldn't find the help files sdb.hyp and sdb.idx, even when
+	the AZTEC environment variable pointed at the directory that held them.
+
+11/4/92 jd: wconfig.c
+	Changed name of default config file to sdb.set, to avoid conflict with
+	4.10d sdb, which used sdb.ini.
+
+	Changed order in which sdb searches for config file. It's now 
+		current dir,
+		AZTEC dir, if AZTEC env exists
+	if config file not found and AZTEC doesn't exist, sdb.set is created
+	in current directory
+
+	Added sdb.set file, with default settings, to sdb.lzh, so that install
+	program will put this in bin directory, where it can be found during
+	standard usage of sdb and rdb
--- a/v52a/BIN/CHANGES.UNI
+++ b/v52a/BIN/CHANGES.UNI
@ -0,0 +1,7 @@
+Changes to unitools GREP, DIFF, LS:
+
+4/9/92 ------------- Released v5.2a beta 1 -------------------------
+
+9/21/92 jd: grep
+	changed grep to ignore directories.
+
--- a/v52a/BIN/CHANGES.UTL
+++ b/v52a/BIN/CHANGES.UTL
@ -0,0 +1,18 @@
+Changes to utilities: 
+
+4/9/92 ----------------- Released v5.2a beta 1 ---------------------
+
+9/10/92 jd: cnm
+	cnm wasn't printing segment, class, group info correctly when in long mode.
+
+9/21/92 jd: lb
+	changed lb to make file & module searches case insensitive.
+
+10/4/92 ----------------- Released v5.2a beta 2 ---------------------
+
+10/27/92 jd: cnm
+	Added -U option to cnm, to display info about unnamed symbols
+
+11/17/92 jd: ai
+	Added ai program to util.lzh
+
--- a/v52a/BIN/CHANGES.Z
+++ b/v52a/BIN/CHANGES.Z
@ -0,0 +1,12 @@
+Changes to Z:
+
+4/9/92 ---------------- Released v5.2a beta 1 ------------------------
+9/17/92 jd: termpc.c, colon.c
+	Added support for vga 50-line mode. 
+	New command- :se 50={1|0}
+
+10/4/92 ---------------- Released v5.2a beta 2 ------------------------
+
+10/14/92 jd: dobang()
+	Before executing an external program for the :! command, z now clears
+	the screen and homes the cursor.
--- a/v52a/BIN/CNM.EXE
+++ b/v52a/BIN/CNM.EXE
--- a/v52a/BIN/CRC.EXE
+++ b/v52a/BIN/CRC.EXE
--- a/v52a/BIN/CTAGS.COM
+++ b/v52a/BIN/CTAGS.COM
--- a/v52a/BIN/DIFF.EXE
+++ b/v52a/BIN/DIFF.EXE
--- a/v52a/BIN/GREP.EXE
+++ b/v52a/BIN/GREP.EXE
--- a/v52a/BIN/HD.EXE
+++ b/v52a/BIN/HD.EXE
--- a/v52a/BIN/HEX86.EXE
+++ b/v52a/BIN/HEX86.EXE
--- a/v52a/BIN/INITSDB.COM
+++ b/v52a/BIN/INITSDB.COM
--- a/v52a/BIN/LB.EXE
+++ b/v52a/BIN/LB.EXE
--- a/v52a/BIN/LHA.EXE
+++ b/v52a/BIN/LHA.EXE
--- a/v52a/BIN/LN.EXE
+++ b/v52a/BIN/LN.EXE
--- a/v52a/BIN/LS.COM
+++ b/v52a/BIN/LS.COM
--- a/v52a/BIN/MAKE.EXE
+++ b/v52a/BIN/MAKE.EXE
--- a/v52a/BIN/MON86MS.EXE
+++ b/v52a/BIN/MON86MS.EXE
--- a/v52a/BIN/OBD.EXE
+++ b/v52a/BIN/OBD.EXE
--- a/v52a/BIN/OBJI.EXE
+++ b/v52a/BIN/OBJI.EXE
--- a/v52a/BIN/OBJMS.EXE
+++ b/v52a/BIN/OBJMS.EXE
--- a/v52a/BIN/OMFDMP.EXE
+++ b/v52a/BIN/OMFDMP.EXE
--- a/v52a/BIN/ORD.EXE
+++ b/v52a/BIN/ORD.EXE
--- a/v52a/BIN/PROF.EXE
+++ b/v52a/BIN/PROF.EXE
--- a/v52a/BIN/RDB.EXE
+++ b/v52a/BIN/RDB.EXE
--- a/v52a/BIN/READ.ME
+++ b/v52a/BIN/READ.ME
@ -0,0 +1,22 @@
+					ALN, ALOC, & AHEX, beta v5.2a
+						Release Notes
+						   8/28/92
+
+In addition to the executable files for ALN, ALOC, and AHEX, this archive
+contains information about what's changed about each program, in the following
+files:
+	  File			What's changed in...
+	------------	--------------------
+	CHANGES.ALN		ALN
+	CHANGES.ALOC	ALOC
+	CHANGES.AHX		AHEX
+
+Please report any problems to me:
+* 	By voice: 908-542-1795, between 2:30 and 5pm, Eastern time;
+*	By modem: 908-542-2793, any time. Modem parameters: up to 2400 baud,
+	8 data bits, 1 stop, no parity;
+*	By fax: 908-542-8386, any time.
+
+Thanks for your help.
+
+	- Jeff Davis
--- a/v52a/BIN/SDB.EXE
+++ b/v52a/BIN/SDB.EXE
--- a/v52a/BIN/SDB.HYP
+++ b/v52a/BIN/SDB.HYP
@ -0,0 +1,505 @@
+^9999
+!Breakpoint commands
+1000
+!Display commands
+2000
+!Frame commands
+3000
+!I/O commands
+6000
+!Memory commands
+4000
+!Formatted output
+8000
+!Register command
+9000
+!Unassemble commands
+10000
+!Macro commands
+28000
+!Display value
+29000
+!Change sdb console
+27000
+!Copy ouput to a file
+14000
+!Shell to dos 
+15000
+!Display current context 
+16000
+!Evaluate a C expression
+17000
+!Execute program
+18000
+!(re)load program file
+19000
+!Quit
+20000
+!Single step
+5000
+!Toggle screen swapping
+21000
+!Toggle source/assembly mode
+22000
+!Find string in current file
+23000
+!Redirect input 
+24000
+!Log commands only to a file
+25000
+General SDB commands
+  Breakpoint commands         Display current context 
+  Display commands            Evaluate a C expression
+  Frame commands              Execute program
+  I/O commands                (re)load program file
+  Memory commands             
+  Formatted output            Quit
+  Register command            Single step
+  Unassemble commands         Toggle screen swapping
+  Macro commands              Toggle source/assembly mode
+  Display value               Find string in current file
+  Change sdb console          Redirect input 
+  Copy ouput to a file        Log commands only to a file
+  Shell to dos 
+#
+^11000
+                      Using the Help system
+
+ Use TAB key to move cursor, and Spacebar or ENTER key to
+ select an option.  Your options are:
+
+  CONTINUE:   Return back to screen prior to last F1.
+  PREVIOUS:   Return back to the previous screen.
+  TOPICS:     Review index of topics.
+  KEYS:       Review Keystrokes & their functions.
+
+  Use TAB key to move cursor past the 4 buttons to select
+  highlighted keywords and then press Spacebar/ENTER key to
+  obtain further information on related topics.
+#
+^12000
+                         Using the Help system
+
+ Use TAB key to move cursor, and Spacebar or ENTER key to
+ select an option.  Your options are:
+
+  CONTINUE:   Return back to screen prior to last F1.
+  PREVIOUS:   Return back to the previous screen.
+  TOPICS:     Review index of topics.
+  KEYS:       Review Keystrokes & their functions.
+
+  Use TAB key to move cursor past the 4 buttons to select
+  highlighted keywords and then press Spacebar/ENTER key to
+  obtain further information on related topics.
+#
+^1000
+!bc
+30000
+!bC
+30000
+!bd
+31000
+!br 
+32000
+!bs
+33000
+!bt
+34000
+!bT
+34000
+!bm
+35000
+!be
+36000
+!ADDR
+7000
+!CMDLIST
+26000
+Breakpoint commands
+  bc ADDR                    Clear breakpoint 
+  bC                         Clear all breakpoints 
+  bd                         Display breakpoints 
+  br [ADDR]                  Reset breakpoint counters 
+ #bs ADDR [;COND][;CMDLIST]  Set or modify a breakpoint 
+  bt                         Toggle call trace
+  bT                         Toggle source line trace
+  bm                         Set memory change breakpoint
+  be                         Set expression breakpoint
+#
+^2000
+!RANGE
+13000
+Display commands
+  da                         Display local addresses
+  dc                         Display code addresses
+  db RANGE                   Display memory as bytes
+  dd                         Display data addresses
+  df [FILENAME,]RANGE        Display file 
+  dg                         Display globals' values
+  dm                         Display DOS RAM map 
+  dn                         Display 8087 
+ #ds                         Display stack backtrace
+ #dS                         Display stack with autos
+  dw RANGE                   Display memory as words
+#
+^3000
+Frame commands
+ #fu                         Frame up
+ #fd                         Frame down
+#
+^4000
+!ADDR
+7000
+!RANGE
+13000
+Memory commands
+  mb ADDR VAL1 VAL2 ...      Modify memory as bytes
+  mc RANGE = ADDR            Compare memory
+  mf RANGE = VAL             Fill memory with value
+  mm RANGE = ADDR            Move memory
+  ms RANGE = VAL1 VAL2 ...   Search memory for value
+  mw ADDR VAL1 VAL2 ...      Modify memory as words
+#
+^5000
+!CMDLIST
+26000
+Single step commands (step into called functions)
+ #s [;CMDLIST]          Single step the program # times
+ #S [;CMDLIST]          Single step without display
+
+Single step commands (step over called functions)
+ #t [;CMDLIST]          Single step # times 
+ #T [;CMDLIST]          Same as 't' 
+                        but don't display until last
+#
+^6000
+Outport commands
+  ob PORT,VAL                Output byte to port
+  ow PORT,VAL                Output word to port
+
+Inport commands
+  ib PORT                    Input byte from port
+  iw PORT                    Input word from port
+#
+^7000
+The Definition of ADDR
+
+An ADDR is the name of a C variable,
+an address constant, or a C expression that yields an address.
+
+Examples of an ADDR are as follows:
+  linkmain.c.19     Address of the code corresponding
+                    to line 19 of linkmain.c
+  .19               Same as above if current file is linkmain.c
+  main              Address of main
+  cs:0x1532         Address formed by using the current 
+                    code and an offset of 0x1532
+  token[j]          Address of jth element of array token
+#
+^8000
+!RANGE
+13000
+Print command
+  p [@FORMAT] [RANGE][,NEXT]  - formatted output
+where 
+    FORMAT is sequence of [COUNT][INDIR][COUNT]DESC
+      COUNT  is a decimal number (defaults to 1)
+      INDIR  is '*'   - short indirect pointer
+             or '#'   - long indirect pointer
+      DESC   is:
+             d (D)    - 2-byte (4-byte) decimal
+             o (O)    - 2-byte (4-byte) octal
+             u (U)    - 2-byte (4-byte) unsigned decimal
+             x (X)    - 2-byte (4-byte) hexadecimal
+             f (F)    - single (double) floating point
+             b[xdo]   - byte in hex or (hex, decimal, or octal)
+             c (C)    - character with (without) translation
+             s (S)    - string with (without) translation
+             p (P)    - short (long) pointer
+             n (N)    - output a newline
+             r (R)    - print a name
+             t (T)    - output a tab
+             \"STRING\"  - output STRING
+             .        - display floats to COUNT significance
+             + (-)    - advance (reduce) address COUNT bytes
+             ^        - reduce address by size of last item
+             a (A)    - set print address to follow short (long)
+                        pointer chain
+#
+^9000
+Register command
+  r [REG = VAL]
+#
+^10000
+!RANGE
+13000
+Unassemble commands
+  u RANGE             - unassemble the program
+  U RANGE             - unassemble without symbols
+#
+^13000
+!ADDR
+7000
+The Definition of RANGE
+
+A RANGE defines a block of memory.
+It has one of the following forms:
+
+  ADDR,CNT
+  ADDR to ADDR  (the word `to' must be included)
+  ADDR 
+  ,CNT
+
+The form ADDR,CNT specifies the starting address, ADDR, and 
+a number, CNT. CNT is interpreted differently by different 
+commands. For example, the `disassemble code' command, u, will 
+display CNT lines, while the `display bytes' command, db, will 
+display CNT bytes.
+
+The form ADDR to ADDR specifies the starting and ending 
+addresses of the range.
+
+A full range need not be explicitly specified, because db 
+remembers the last-used range and will set unspecified RANGE 
+parameters from the remembered values:
+
+  *  When a RANGE is specified which consists of a single 
+     ADDR,  the last used CNT is used.
+  *  When a RANGE is specified which consists of `,CNT', the 
+     next consecutive address is used, and the remembered 
+     count is changed to the new value.
+  *  When nothing is specified as the RANGE, the next 
+     consecutive address is used as the starting ADDR, and 
+     the CNT is set to the remembered value.
+#
+^14000
+Copy ouput to a file
+#
+^15000
+Shell to dos 
+#
+^16000
+Display current context 
+#
+^17000
+Evaluate a C expression
+#
+^18000
+Execute program
+#
+^19000
+(re)load program file
+#
+^20000
+Quit
+#
+^21000
+Toggle screen swapping
+#
+^22000
+Toggle source/assembly mode
+#
+^23000
+Find string in current file
+#
+^24000
+Redirect input 
+#
+^25000
+Log commands only to a file
+#
+^26000
+The Definition of CMDLIST
+
+A CMDLIST is a list of commands.
+It consists of a sequence of commands or macros separated by semicolons:
+
+  COMMAND [;COMMAND ...]
+
+If a macro is in a CMDLIST, it must be the last 
+command in the list.
+#
+^27000
+Change sdb console
+#
+^28000
+Macro commands
+  x NAME MACRO        - create a macro
+  X NAME              - display a macro
+#
+^29000
+!EXPR
+37000
+Display value
+  = EXPR              - display the value of EXPR
+#
+^30000
+!ADDR
+7000
+bc   -    Clear a single breakpoint
+bC   -    Clear all breakpoints
+
+Syntax:
+   bc ADDR
+   bC
+
+These commands delete breakpoints from the breakpoint table.
+
+bc deletes the single breakpoint specified by the address 
+ADDR, and bC deletes all breakpoints from the table.
+#
+^31000
+bd   -    Display breakpoints
+
+Syntax:
+bd
+
+bd displays all entries in the breakpoint table. 
+
+For each breakpoint, the following information is displayed:
+  *  Its address, using a symbolic name, if possible.
+  *  The number of times it's  been `hit' without a 
+     breakpoint being taken.
+  *  The skip count for it.
+  *  The command list for it, if any.
+
+For example, a bd display might be:
+  address       hits  skip    command
+  cs:printf_     1     2
+  cs:putc_       0     0      db ds:_Cbuffs
+
+In this example, two breakpoints are in the table. 
+The first is at the beginning of the function printf_; 
+a breakpoint will be taken for it every third time it is reached, 
+and no command will be executed. 
+Given its current hit count, a breakpoint will be 
+taken the next time printf_ is reached.
+
+The second breakpoint is at the function putc_; a breakpoint 
+will be taken each time the function is reached, and will display 
+memory, in bytes, starting at ds:_Cbuffs.
+#
+^32000
+!ADDR
+7000
+br   -    Reset breakpoint counters
+.sP
+Syntax:
+  br [ADDR]
+
+br resets the `hit' counter for the specified breakpoint 
+which is at the address, ADDR. 
+If ADDR isn't given, the `hit' 
+counters for all breakpoints in the breakpoint table are reset.
+#
+^33000
+!ADDR
+7000
+!CMDLIST
+26000
+bs   -    Set or modify a breakpoint
+.sP
+Syntax:
+  [#] bs ADDR [;CMDLIST]
+
+bs enters a breakpoint into the breakpoint table, or 
+modifies an existing entry.
+
+The optional parameter # is the skip count for the 
+breakpoint. 
+If not specified, the skip count is set to 0, meaning 
+that each time the breakpoint is reached it will be taken.
+
+The optional parameter CMDLIST is a list of debugger 
+commands to be executed when the breakpoint is taken.
+#
+^34000
+bt   -    Toggle the call trace mode flag
+bT   -    Toggle the source line trace mode flag
+
+Syntax:
+  bt
+  bT 
+
+bt and bT toggle the call trace mode and source line 
+trace mode flags,  respectively.
+The state of the trace mode flag determines whether trace 
+mode is enabled or disabled.
+
+In call trace mode, the debugger will print the names and 
+arguments of each call within the program as it executes. 
+On return, the value of the function's return will be printed.
+
+In source line trace mode, each statement of the program will 
+be displayed just before it is executed.
+#
+^35000
+!RANGE
+13000
+bm   -    Set memory change breakpoint
+
+Syntax:
+  bm [RANGE]
+
+bm sets and clears a memory change breakpoint. Only one such 
+breakpoint can be active at a time.
+
+A memory change breakpoint is set by specifying the optional 
+RANGE parameter; in this case, a breakpoint will be taken 
+whenever the specified RANGE changes.
+
+A memory change breakpoint is cleared when the bm command 
+is specified with no parameter.
+
+When a memory change breakpoint is set, the debugger will 
+check the specified RANGE at the following times: 
+  * on function entry and exit, when call trace mode is active 
+    (see the bt command);
+  * after each instruction execution, when source line trace 
+    mode is active (see the bT command), or when single-stepping 
+    (see the s and t commands).
+#
+^36000
+!EXPR
+37000
+be   -    Set expression change breakpoint
+
+Syntax:
+  be [EXPR]
+
+be sets and clears the expression breakpoint. 
+Only one such breakpoint can be active at a time.
+
+An expression breakpoint is set by specifying the optional 
+EXPR parameter; in this case, a breakpoint will be taken 
+whenever the specified EXPR is true.
+
+An expression breakpoint is cleared when the be command 
+is specified with no parameter.
+
+When an expression breakpoint is set, the debugger will check the 
+specified RANGE at the following times: 
+  * on function entry and exit, when call trace mode is active 
+    (see the bt command);
+  * after each instruction execution, when source line trace 
+    mode is active (see the bT command), or when single-stepping 
+	(see the s and t commands).
+#
+^37000
+The Definition of EXPR
+
+An EXPR is any valid C expression.
+
+For example, an EXPR can consist of a single term, a series of 
+terms separated by operators, the use of registers by their 
+standard names, or 16 bit values representing memory locations 
+of the form segment:offset.
+
+Here are some examples of EXPR:
+  si
+  x + 2.0
+  (i == j) ? 2 : 3
+  ds:0x4127
+  sin(y)
+  array[j]
+#
--- a/v52a/BIN/SDB.IDX
+++ b/v52a/BIN/SDB.IDX
@ -0,0 +1,40 @@
+9999,0
+11000,1302
+12000,1828
+1000,2357
+2000,3012
+3000,3625
+4000,3731
+5000,4086
+6000,4465
+7000,4714
+8000,5261
+9000,6520
+10000,6565
+13000,6712
+14000,7870
+15000,7903
+16000,7929
+17000,7966
+18000,8002
+19000,8030
+20000,8064
+21000,8081
+22000,8116
+23000,8156
+24000,8196
+25000,8224
+26000,8264
+27000,8514
+28000,8545
+29000,8653
+30000,8744
+31000,9048
+32000,10062
+33000,10342
+34000,10844
+35000,11447
+36000,12268
+37000,13079
+37000,13482
+#
--- a/v52a/BIN/SDB.SET
+++ b/v52a/BIN/SDB.SET
--- a/v52a/BIN/SDB41D.EXE
+++ b/v52a/BIN/SDB41D.EXE
--- a/v52a/BIN/SQZ.EXE
+++ b/v52a/BIN/SQZ.EXE
--- a/v52a/BIN/XREF.EXE
+++ b/v52a/BIN/XREF.EXE
--- a/v52a/BIN/Z.EXE
+++ b/v52a/BIN/Z.EXE
--- a/v52a/DOC/README.TXT
+++ b/v52a/DOC/README.TXT
@ -0,0 +1,858 @@
+
+
+
+                                     Aztec C86
+                                   Release notes
+                                 Beta version 5.2a
+                                    17 Nov 1992
+
+            This release document describes version 5.2a of Aztec C86.
+          It's organized into the following sections:
+            
+            1. Installation instructions, which describes how to install
+               the Aztec C files from the distribution disks onto your
+               disks;
+            2. Disk contents, which describes what's on the distribution
+               disks;
+            3. New features, which describes what's changed in going
+               from version 4.2b to the current release;
+            4. New features, which describe what's changed in going from
+               the 9 April beta release to the current release.
+            5. New features, which describe what's changed in going from
+               the 4 Oct beta release to the current release.
+
+            After installation, additional documentation is also
+          available in file README2.TXT in the DOC subdirectory that's
+          within your root Aztec directory.
+
+            To report problems with this beta release, please call Manx
+          Tech Support at 908-542-1795, between 2:30pm and 5pm Eastern
+          time.
+
+
+          1. Installation
+
+            To install Aztec C86, put the first distribution disk in a
+          floppy drive, make that drive the current drive, and type
+               
+               install
+
+            The install program will display a dialog box containing
+          text fields, check box fields, and button fields that you can
+          adjust to customize the installation. To move around within
+          this dialog box, you can use a mouse, or the tab key. You can
+          get help by pressing the F1 key.
+
+            Once you've made your selections, press the "Proceed" button
+          to continue with the installation, or press the "Abort" button
+          to terminate the installation. After you press the "Proceed"
+          button, insert the distribution disks in the source drive as
+          prompted by the program.
+
+            When the files are all installed to the hard disk, the
+          program will return to DOS.
+
+            After the installation program is complete, the bin
+          subdirectory of your main Aztec directory will contain a batch
+          file named AZ86.BAT. The commands in this file will initialize
+          your system for use with Aztec C86. You may wish to place the
+          contents of this file directly in your AUTOEXEC.BAT file.
+
+
+
+
+
+Release notes                   page 1
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+            The following paragraphs describe the fields in the
+          installation program's dialog box.
+
+          1.1 The 'Source drive' text field
+
+            In the 'source drive' text field, type the name of the
+          floppy drive in which you will place the distribution disks.
+          This field defaults to the A: drive.
+
+          1.2 The 'Destination directory' text field
+
+            In the 'destination directory' text field, type the name of
+          the drive and directory into which you want the installation
+          program to place the Aztec C86 files. This field defaults to
+          C:\AZ86.
+
+            The installation program will place files in the following
+          subdirectories of the destination directory:
+                 
+                 BIN     The executable programs;
+                 INCLUDE Include files;
+                 LIB     Library source, object modules, and libraries;
+                 MON86   Code for RDB monitor program.
+
+          1.3 The 'Install programs, includes, and source' check boxes
+
+            Check these boxes depending on what you want installed.
+
+            You toggle the setting of a box by pressing the space bar,
+          or by clicking the mouse in the box.
+
+          1.4 The 'Object libraries' check boxes
+
+            The Aztec C86 distribution disks contain the following
+          categories of object module libraries:
+            
+            C libraries            Non-floating point functions;
+            IEEE math libraries    Floating point functions, which
+                                   perform calculations using software;
+            8087 math libraries    Floating point functions, which
+                                   perform calculations using an 8087;
+            Sensing math libraries Floating point functions, which
+                                   perform calculations using an 8087 if
+                                   present or using software if not;
+            Screen libraries       Functions for accessing the screen
+                                   and keyboard via the ROM BIOS;
+            Graphics libraries     Graphics functions.
+
+            Check the boxes that define the libraries you want
+          installed.
+
+          1.5 The 'Memory models' check boxes
+
+            Check on the 'library memory models' boxes to define the
+          memory models of the libraries that you want installed.
+
+
+
+
+
+
+Release notes                   page 2
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+            For example, if you want the C libraries installed that use
+          the small code and small data memory model, you would check
+          the 'C libraries' and the 'small code, small data' boxes.
+
+          1.6 The 'Optional components' check boxes
+
+            If you've purchased the optional Level 2 or Level 3
+          Extensions to Aztec C86, check the appropriate boxes to
+          specify which of the Extension components you want installed.
+
+            Don't check these boxes if you don't have the extensions.
+
+          1.7 Bypassing the installation program
+
+            Most of the files on the distribution disks are in standard
+          LHARC format. So if you want, you can bypass the installation
+          program altogether and dearchive the archive files that are on
+          the distribution disks using the LHARC program that is
+          provided with Aztec C. This archive program is installed in
+          the Aztec root directory's BIN subdirectory; this program, and
+          documentation on how to use it, is also on distribution disk
+          1. The LHARC program is in file LHA.EXE, and documentation is
+          in file LHA.DOC.
+
+          1.8 Re-entering the installation program
+
+            The installation program can be run more than once. For
+          example, during one execution you could install the programs,
+          include files, and object libraries; and during a second
+          execution you could install the library source files.
+
+
+          2. Contents of distribution disks
+
+            v5.2a of Aztec C86 is packaged into a base package and two
+          levels of optional extensions. The components of these
+          packages are:
+            *  Base package:
+                 +  Compiler, assembler, DOS linker
+                 +  Include files
+                 +  Object module utilities
+                 +  Object libraries
+                 +  SDB source level debugger.
+            *  Level 2 extensions:
+                 +  Library source;
+                 +  HEX86, startup routines, and heap-management
+                    routines, for ROMming programs that have non-complex
+                    segmentation requirements.
+            *  Level 3 extensions:
+                 +  RDB debugger and MON86 monitor, for remote source-
+                    level debugging of ROM- and DOS-based programs;
+                 +  ALN linker, ALOC locator, AHEX hexer, and startup
+                    routines, for ROMming programs that have complex
+                    segmentation requirements
+
+            The following paragraphs describe the files that are on the
+          Aztec distribution disks.
+
+
+
+
+Release notes                   page 3
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+          2.1 Disk 1 contents
+               File           Contents
+               INSTALL.EXE    Installation program
+               LHA.EXE        LHARC program (this replaces the ARCV
+                              and MKARCV programs that are described
+                              in the manual)
+               LHA.HLP        LHARC help
+               LHA.DOC        LHARC documentation
+
+          2.2 Disk 2 contents
+               File           Contents
+               CC.LZH         Compiler
+               AS.LZH         Assembler
+               LN.LZH         Linker
+               INCLUDE.LZH    include files
+               UTIL.LZH       Object module utilities, HEX86, and
+                              miscellaneous utilities
+               UNITOOLS.LZH   Unix-compatible programs
+
+          2.3 Disk 3 contents
+               File           Contents
+               SDB.LZH        SDB source level debuger
+
+          2.4 Disk 4 contents
+               File           Contents
+               C.LZH          Small code, small data c & m libraries
+               CL.LZH         Large code, large data c & m libraries
+               CLC.LZH        Large code, small data c & m libraries
+               CLD.LZH        Small code, large data c & m libraries
+               M87.LZH        8087 math libraries (all memory models)
+               MS.LZH         Sensing math libraries (all models);
+               G.LZH          Graphics libraries
+               S.LZH          Screen libraries
+
+          2.5 Disk 5 contents
+
+            Disk 5 contains the optional Level 2 extensions.
+               File           Contents
+               86SUP.LZH      LIB\86SUP source files
+               DOS.LZH        LIB\DOS source
+               GRAPHICS.LZH   LIB\GRAPHICS source
+               INP.LZH        LIB\INP files
+               LIB.LZH        LIB files
+               MISC.LZH       LIB\MISC source
+               MATH.LZH       LIB\MATH source
+               ROM86.LZH      LIB\ROM86 source
+               SCREEN.LZH     LIB\SCREEN source
+               STDIO.LZH      LIB\STDIO source
+               STDLIB.LZH     LIB\STDLIB source
+               STRING.LZH     LIB\STRING source
+               SYSIO.LZH      LIB\SYSIO source
+               TIME.LZH       LIB\TIME source
+               UTIL2.LZH      Programs for level 2 extensions
+
+          2.6 Disk 6 contents
+
+            Disk 6 contains the optional Level 3 extensions.
+               File           Contents
+
+
+
+Release notes                   page 4
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+               LNKLOC.LZH     Advanced linker, locator, and hexer
+                              programs
+               RDB.LZH        Remote source level debugger
+
+
+          3. New Features since v4.2a
+
+            This section describes functional changes that have been
+          made in going from the v4.2b release to the 9 April v5.2a beta
+          release.
+
+          3.1 Compiler changes
+
+            The following paragraphs describe the changes that have been
+          made to the compiler in going from version 4.2b to 5.2a.
+
+          3.1.1 New compiler options
+            -J Enable trigraph support.
+            -F Generate prototypes for static functions, without
+               generating executable code. Send prototypes by default to
+               a file whose name is derived from input file, by changing
+               the extension to .PRO. The -O option can be used to
+               select the output file name. This option replaces the
+               PROTO program.
+            -X Generate prototypes for non-static functions, without
+               generating executable code. Send prototypes by default to
+               a file whose name is derived from input file, by changing
+               the extension to .PRO. The -O option can be used to
+               select the output file name.
+            -W Preprocess source. Send preprocessed C source by default
+               to a file whose name is derived from input file, by
+               changing the extension to .PRE. The -O option can be used
+               to select the output file name. This option replaces the
+               CPP program.
+
+          3.1.2 New predefined symbols
+            __VERSION    Predefined with the version of the compiler. It
+                         has the value 520;
+            _LARGE_CODE  Predefined with value 1 if program is compiled
+                         to use the large code memory model;
+            _LARGE_DATA  Predefined with value 1 if program is compiled
+                         to use the large data memory model;
+
+          3.1.3 New language features
+
+            Support for the following language features has been added
+          to the v5.2 compiler:
+            *  Initialization of auto aggregate variables;
+            *  Trigraphs.
+
+          3.1.4 New support for 8086 segmentation
+
+            The compiler now allows you to define, using the new
+          "#pragma segment" directive, the segments into which variables
+          are placed. This directive has the following form:
+               
+
+
+
+
+
+Release notes                   page 5
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+               #pragma segment [segname]
+                    [class classname] [at addr] [near | far]
+                    sym1, sym2 ...
+
+          where the parameters have the following meanings:
+                 sym1, sym2, ...
+                              Symbols that are to be placed in a
+                              specified segment;
+                 segname
+                              'segname' is the segment that's to hold
+                              the symbols.
+                 class classname
+                              'classname' is the class in which the
+                              segment is located. If not specified, the
+                              class defaults to 'DATA'.
+                 at addr      'addr' is the segment's starting address;
+                 near | far   A NEAR segment is always accessible via
+                              the DS segment register, and a FAR segment
+                              is not. To access a FAR segment, the ES
+                              register must first be loaded with the
+                              segment's paragraph address. Defaults to
+                              FAR.
+
+            Previous versions of the compiler allowed you to specify
+          that variables were to go into their own segments, but the
+          compiler itself chose the names of these segments. With the
+          ability to choose segment names yourself, and with the new ALN
+          linker and ALOC locator, you can now easily position variables
+          in special areas of memory. For example, if your system has
+          memory-mapped I/O, you can create structure that matches the
+          memory-mapped I/O section of memory, place that structure in
+          its own segment, and position the segment at the memory-mapped
+          I/O's section of memory.
+
+            Previous versions of the compiler did not allow you to put
+          near data items into special segments. With this capability,
+          and with the new ALN linker and ALOC locator, you can now
+          easily take advantage of battery-backed-up RAM. For example,
+          you can place variables that should not be initialized on
+          system startup in a  DS-accessible near segment, and position
+          that segment at the beginning of RAM. The other standard
+          Aztec-created, DS-accessible, near segments can be placed
+          after the special segment in RAM, where they can safely be
+          initialized on system startup.
+
+          3.2 Assembler changes
+            *  ORG directive now fully supported;
+            *  The "AT addr" clause of the SEGMENT directive is now
+               supported.
+
+          3.3 DOS linker changes
+            *  None.
+
+          3.4 Library changes
+            *  Libraries are now ANSI compatible (previously they were
+               K&R compatible). Probably the main change you will have
+               to make to your programs is to change your calls to
+               fopen(), to support fopen's TEXT and BINARY modes.
+
+
+
+Release notes                   page 6
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+            *  The time() function now returns the current time as the
+               number of seconds that have elapsed since Jan 1, 1970.
+               Previously it returned the current time in the format
+               used for file directory time fields.
+
+          3.5 Include file changes
+            *  Include files are now completely ANSI compatible
+               (previously they were K&R compatible).
+
+          3.6 Level 2 extensions for creating ROMable code
+
+            The optional Level 2 extensions contain components for
+          creating ROMable code of systems whose segmentation
+          requirements are not too demanding. For example, a typical
+          system might have its code in one set of ROM chips and its
+          data in one set of RAM chips.
+
+            These components are:
+            *  The HEX86 utility that was in v4.2b, for converting a
+               program into Intel hex code;
+            *  BEGIN-SD.ASM and HEAP-SD.ASM, the startup and heap
+               management routines for programs that use the small data
+               memory model;
+            *  BEGIN-LD.ASM and HEAP-LD.ASM, the startup and heap
+               management routines for programs that use the large data
+               memory model;
+
+            The heap management routines are new; the routines in 4.2b
+          and earlier releases were for DOS-based systems.
+
+            BEGIN-SD.ASM and BEGIN-LD.ASM have replaced the ROM86.ASM
+          startup routine that was in 4.2b. They were changed so that
+          they now initialize the heap as required by the new heap
+          management routines.
+
+          3.7 Level 3 extensions for creating ROMable code
+
+            The new, optional, Level 3 extensions to Aztec C86 contain
+          the following utility programs and startup code for creating
+          multi-segmented romable code:
+            *  The ALN linker. This program links object modules
+               together, and outputs a relocatable object module. The
+               input modules can be in Aztec object format, Microsoft
+               OMF format, or Intel OMF format. The output module is in
+               Intel OMF format.
+            *  The ALOC locator. This program 'locates' an object module
+               that is in relocatable Intel OMF format; that is, defines
+               the starting memory addresses of the module's segments
+               and converts relocatable items to absolute.
+            *  The AHEX hexer. This program converts an object module
+               that is in absolute Intel OMF format into Intel hex code
+               or binary code.
+            *  The ABEGINSD and ABEGINLD startup routines, which gain
+               control when a program created with ALN, ALOC, and AHEX
+               is activated.
+
+
+
+
+
+
+Release notes                   page 7
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+            For heap management, programs that use the Level 3
+          extensions should use the heap management routines that are in
+          the Level 2 extensions.
+
+            ALN, ALOC, and AHEX are described at the end of this
+          document. ABEGIN is described in the following section.
+
+          3.8 The ABEGIN startup routine.
+
+            ABEGIN is the startup routine that's used by programs that
+          have been generated using the ALN, ALOC, and AHEX programs.
+
+          3.8.1 ABEGIN files
+
+            To support different memory models, ABEGIN is provided in
+          two source files and four object module files, in directory
+          LIB\ROM86. Source files:
+               ABEGINSD.ASM   Source for programs that use small data
+                              memory model;
+               ABEGINLD.ASM   Source for programs that use large data
+                              memory model;
+
+            Object files:
+               ABEGINSD.O     Object module for programs that use small
+                              code, small data memory model. Generated
+                              from ABEGINSD.ASM;
+               ABEGINSD.OLC   Object module for programs that use large
+                              code, small data memory model; Generated
+                              from ABEGINSD.ASM;
+               ABEGINLD.OLD   Object module for programs that use small
+                              code, large data memory model; Generated
+                              from ABEGINLD.ASM;
+               ABEGINLD.OL    Object module for programs that use large
+                              code, large data memory model. Generated
+                              from ABEGINLD.ASM;
+
+          3.8.2 Notes about ABEGIN
+            *  By default, ABEGIN initializes a program's DATA class in
+               RAM from a copy in ROM. The copy must immediately follow
+               the program's CODE class in ROM.
+            *  ABEGIN can optionally initialize a program's FAR_DATA
+               class in RAM from a copy in ROM. This is the class in
+               which the compiler by default places a program's far
+               data. This class must immediately follow the program's
+               DATA class in ROM.
+            *  ABEGIN contains the target system's reset code, in the
+               RESET_CODE segment. By default, AHEX will position this
+               segment so that it resides at the system's reset vector
+               location.
+            *  ABEGIN contains code that will initialize an 80186. To
+               enable generation of this code, assemble ABEGINxx.ASM
+               with the symbol CPU_186 defined.
+            *  The small data version of ABEGIN (ABEGINSD.ASM) puts a
+               program's stack within the program's uninitialized data
+               area, beginning at the location defined by symbol
+               'cstack'. The number of paragraphs in the stack area is
+               defined by the symbol 'stacksize', which defaults to 80h
+               paragraphs.
+
+
+
+Release notes                   page 8
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+            *  The small data version of ABEGIN puts a program's heap
+               right after the program's uninitialized data area. The
+               number of paragraphs in the heap is defined by the symbol
+               'heapsize', which defaults to 80h paragraphs.
+            *  The large data version of ABEGIN (ABEGINLD.ASM) puts a
+               program's stack right after the program's uninitialized
+               data area. The symbol 'stacksize' defines the number of
+               paragraphs in this area, and defaults to 80h paragraphs.
+            *  The large data version of ABEGIN puts a program's heap
+               right after the program's stack area. The symbol
+               'heapsize' defines the number of paragraphs in this area,
+               and defaults to 80h paragraphs.
+
+          3.9 SDB changes
+            *  There are now two versions of SDB: the regular SDB; and
+               RDB, which allows remote source level debugging of a
+               program that resides in another MSDOS/PCDOS- or ROM-based
+               system.
+            *  Both SDB and RDB have a new windowed interface, and
+               hypertext help.
+            *  INITSDB is no longer needed for configuring SDB.
+            *  RDB and SDB occupy significantly more RAM memory than
+               v4.10d SDB. This is not a problem for RDB, since the
+               program being debugged resides in a separate machine. But
+               it is a problem with SDB since it and the program being
+               debugged must reside in the same system. Until we resolve
+               this problem with SDB, which we will probably do by
+               moving SDB up into extended memory, we are providing the
+               v4.10d SDB, in file SDB410D.EXE, and INITSDB (for
+               configuring the SDB410D).
+
+          3.10 Z changes
+            *  The command :se 50=1 can be used on VGA screens to
+               display 50 lines.
+
+          3.11 Other program changes
+
+            Other new programs in v5.2 are these:
+            *  XREF, which generates a cross-reference listing of symbol
+               references and definitions in object modules.
+
+            Programs that are no longer provided:
+            *  PROTO, which has been replaced with the new compiler
+               options -F and -X;
+            *  CPP, which has been replaced with the new compiler option
+               -W;
+            *  ENGTOC;
+            *  CTOENG;
+            *  ARCV.
+
+          3.12 Building libraries
+
+            Library source is in the optional Level 1 extensions to
+          Aztec C86. The INSTALL program will create a LIB subdirectory
+          of the root Aztec directory and several subdirectories of LIB,
+          and then install the source in these subdirectories.
+
+
+
+
+
+Release notes                   page 9
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+            You can build one or more libraries by CD'ing into the LIB
+          directory and then invoking MAKE with codes that identify the
+          libraries you want made. The codes and their associated
+          libraries are:
+            
+                    ALL       All libraries
+                    C_ALL     All C libraries
+                    C         C.LIB
+                    CL        CL.LIB
+                    CLC       CLC.LIB
+                    CLD       CLD.LIB
+                    M_ALL     All M libraries
+                    M         M.LIB
+                    ML        ML.LIB
+                    MLC       MLC.LIB
+                    MLD       MLD.LIB
+                    M87_ALL   All M87 libraries
+                    M87       M87.LIB
+                    M87L      M87L.LIB
+                    M87LC     M87LC.LIB
+                    M87LD     M87LD.LIB
+                    MS_ALL    All MS (8087-sensing) math libraries
+                    MS        MS.LIB
+                    MSL       MSL.LIB
+                    MSLC      MSLC.LIB
+                    MSLD      MSLD.LIB
+                    S_ALL     All S (screen) libraries
+                    S         S.LIB
+                    SL        SL.LIB
+                    SLC       SLC.LIB
+                    SLD       SLD.LIB
+                    G_ALL     All G (graphics) libraries
+                    G         G.LIB
+                    GL        GL.LIB
+                    GLC       GLC.LIB
+                    GLD       GLD.LIB
+
+            To build libraries, MAKE will invoke a second copy of MAKE,
+          passing to it parameters that define what's to be made.
+
+            For each library that it's to make, this second MAKE will do
+          the following:
+            
+            *  CD into each required subdirectory of the LIB
+               subdirectory and invoke a third copy of MAKE. This third
+               MAKE will generate object modules for the library, from
+               the source that's in the subdirectory.
+            *  CD into the INP subdirectory and sort the names of the
+               object modules that will go into the library, using the
+               ORD utility;
+            *  Build the library into the LIBS subdirectory of the LIB
+               directory, using the LB utility.
+
+
+
+
+
+
+
+
+
+Release notes                  page 10
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+          4. New Features since the 4/9/92 beta
+
+            This section describes changes that have been made since the
+          9 April 92 beta release. It first describes functional changes
+          that have been made, and then bug fixes.
+
+          4.1 Compiler changes
+            *  The new -M option causes the compiler to issue a warning
+               if a function is called without a prototype being in
+               scope.
+            *  The new +T option causes $$var statements (used to access
+               far data) to be put into the code segment instead of the
+               data segment.
+
+          4.2 Z changes
+            *  On a VGA display, the command :se 50=1 can be used to
+               display 50 lines.
+
+          4.3 Library changes
+            *  The new TimeFile2TM() function converts a time value
+               that's in the format used for file directory time fields
+               to the format that's used by the time() function.
+            *  The new TimeTM2File() function converts a time value
+               that's in the format used by the time() function to file
+               system format.
+            *  The graphics functions now support VGA modes 0x10, 0x11,
+               0x12, and 0x13.
+            *  The movblock() function has been changed. A length
+               argument of 0 now means don't copy anything; used to mean
+               copy 64kbytes.
+            *  The scdir() function has been changed. When passed a
+               NULL, it resets itself so that the next call can specify
+               a new pattern.
+
+          4.4 SDB/RDB changes
+            *  The DI command causes sdb/rdb to display information
+               about the debugger's heap usage.
+
+
+          5. New features since the 10/4/92 beta
+
+          5.1 SDB/RDB changes
+            *  The name of the default configuration file for SDB and
+               RDB has been changed to SDB.SET, from SDB.INI.
+            *  The sequence in which SDB/RDB search for SDB.SET has been
+               changed. On startup they look in the following places:
+                 1. The current directory;
+                 2. The directory whose name is assigned to the AZTEC
+                    environment variable;
+                 3. If SDB.SET is not found and AZTEC environment
+                    variable doesn't exist, SDB.SET is created in the
+                    current directory.
+
+          5.2 CNM changes
+            *  The -U option has been added, to display information
+               about a module's unnamed symbols.
+
+
+
+
+
+Release notes                  page 11
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+          5.3 Library changes
+            *  The following functions have been added:
+                 +  fnsplit(), which breaks a file name up into drive,
+                    path, filename, and extension components; Calling
+                    sequence:
+                         int fnsplit(char *name, char *drive, char *dir,
+                         char *fname, char *ext);
+                    where
+                      -  name points at the name to be broken down;
+                      -  drive points at the area where the name's drive
+                         component is placed;
+                      -  dir points at the area where the name's
+                         directory component is placed;
+                      -  fname points at the area where the name's
+                         filename component is placed;
+                      -  ext points at the area where the name's
+                         extension is placed.
+                 +  fnmerge(), which creates a file name from drive,
+                    path, filename, and extension components. It has the
+                    same arguments as fnsplit(); a complete file name is
+                    built up from the drive, dir, fname, and ext args,
+                    and stored in the area pointed at by name.
+                 +  strdup(), which makes a copy of a string in the
+                    heap. Calling sequence:
+                         char *strdup(char *str);
+                 +  lfind(), which performs a linear search of an array
+                    for a specified item. Calling sequence:
+                         void *lfind(void *key, void *base, size_t *num,
+                         size_t width, int (*fcmp)(void *, void *));
+                    where:
+                      -  key points at the value to be located;
+                      -  base points at the array to be searched;
+                      -  num points at the number of array elements;
+                      -  width is the width in bytes of each array
+                         element;
+                      -  fcmp points at a function that compares two
+                         keys. The function returns 0 if the items are
+                         identical, and non-zero if different.
+                    lfind() returns a pointer to the matching array
+                    element, or NULL if not found.
+                 +  lsearch(), same as lfind(), except it appends the
+                    item if not found. The calling sequence is the same
+                    as for lfind().
+                 +  min(), returns the lesser of two ints. Calling
+                    sequence:
+                         int min(int a, int b);
+                    where a and b are the items to be compared.
+                 +  max(), returns the greater of two ints. Calling
+                    sequence:
+                         int max(int a, int b);
+                    where a and b are the items to be compared.
+            *  The following symbols were added to the ABEGINSD.ASM and
+               ABEGINLD.ASM startup routines:
+                 +  NEAR_DATA_INIT. If 1, the initialized near data
+                    segment (dataseg) is initialized from a copy in ROM.
+                    If 0, this initialization is not done. Default
+                    value: 1.
+
+
+
+
+Release notes                  page 12
+
+
+Aztec C86, beta v5.2a                                                11/17/92
+
+                 +  FAR_DATA_INIT. If 1, the initialized far data class
+                    FAR_DATA is initialized from a copy in ROM. If 0,
+                    this initialization is not done. Default value: 0.
+                 +  FAR_BSS_INIT. If 1, the uninitialized fat data class
+                    FAR_BSS is cleared. If 0, FAR_BSS is not cleared.
+                    Default value: 0.
+                 +  CPU_186. Set to 1 if processor is an 80186/80188, or
+                    0 if not. Default value: 0.
+
+          5.4 The AI program
+
+            AI is a new program that displays information about Aztec
+          C86 programs. For information, type AI.
+
+          5.5 Bug fixes
+
+               Numerous bugs have been fixed, in programs, library
+               functions, and include files. These fixes are described
+               in the CHANGES.* files that are stored in the BIN,
+               INCLUDE, and LIB subdirectories of the main Aztec
+               directory. Once you've finished examining these files,
+               you can delete them.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Release notes                  page 13
+
--- a/v52a/INCLUDE/ALLOC.H
+++ b/v52a/INCLUDE/ALLOC.H
@ -0,0 +1,18 @@
+/* Copyright 1992 Manx Software Systems, Inc. All rights reserved */
+
+#ifndef __ALLOC_H
+#define	__ALLOC_H
+
+int 			brk(void *ptr);
+void *			sbrk(int _size);
+
+huge void *		lcalloc(long _nelem, long _size);
+huge void *		lfree(huge void *_ptr);
+huge void *		lmalloc(long _size);
+huge void *		lrealloc(huge void *_ptr, long _size);
+
+unsigned int	rsvstk(int _size);
+
+#endif	/* __ALLOC_H */
+
+
--- a/v52a/INCLUDE/ASSERT.H
+++ b/v52a/INCLUDE/ASSERT.H
@ -0,0 +1,13 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __ASSERT_H 
+#define __ASSERT_H
+
+#ifndef NDEBUG
+void _assert(char *, char *, unsigned int);
+#define assert(x) (x == 0 ? _assert(#x, __FILE__, __LINE__):(void)0)
+#else
+#define assert(x)	((void)0)
+#endif
+
+#endif
--- a/v52a/INCLUDE/CHANGES.INC
+++ b/v52a/INCLUDE/CHANGES.INC
@ -0,0 +1,19 @@
+Changes to include files:
+
+4/9/92 ------------- Released v5.2a beta 1 -------------------
+
+9/18/92 jd: time.h
+	LocalFileTime() replaced by TimeFile2TM(), so replaced prototype in time.h.
+
+	Added prototype to time.h for new function TimeTM2File()
+
+10/4/92 ------------- Released v5.2a beta 2 -------------------
+
+11/17/92 jd: 
+  stdlib.h:
+	Added prototypes for non-ANSI functions lsearch(), lfind(), lfree(),
+	min(), max()
+  fcntl.h:
+	Added prototypes for non-ANSI functions fnsplit(), fnmerge()
+  string.h:
+  	Added prototype for non-ANSI function strdup()
--- a/v52a/INCLUDE/COLOR.H
+++ b/v52a/INCLUDE/COLOR.H
@ -0,0 +1,13 @@
+#define BLACK	 	0
+#define BLUE	   	1
+#define GREEN	   	2
+#define CYAN	   	3
+#define RED	   		4
+#define MAGENTA		5
+#define YELLOW		6
+#define WHITE		7
+
+#define BLINK	    1
+#define NO_BLINK    0
+#define HIGH		1
+#define LOW			0
--- a/v52a/INCLUDE/CTYPE.H
+++ b/v52a/INCLUDE/CTYPE.H
@ -0,0 +1,51 @@
+/* Copyright 1990 Manx Software Systems, Inc.	*/
+/* All rights reserved.							*/
+
+#ifndef __CTYPE_H
+#define __CTYPE_H
+
+extern char _ctype[];
+
+#define	_U	0x01	/* Upper-case	*/
+#define	_L	0x02	/* Lower-case	*/
+#define	_D	0x04	/* Decimal-digit */
+#define	_H	0x08	/* Hex-digit	*/
+#define	_W	0x10	/* White-space	*/
+#define	_C	0x20	/* Control char	*/
+#define	_P	0x40	/* Punctuation	*/
+#define	_B	0x80	/* Blank		*/
+
+int isalpha(int _c);
+int isupper(int _c);
+int islower(int _c);
+int isdigit(int _c);
+int isxdigit(int _c);
+int isalnum(int _c);
+int isspace(int _c);
+int ispunct(int _c);
+int iscntrl(int _c);
+int isprint(int _c);
+int isgraph(int _c);
+int isascii(int _c);
+int tolower(int _c);
+int toupper(int _c);
+
+#define isalpha(x)	((_ctype+1)[(unsigned char)(x)]&(_L|_U))
+#define isupper(x)	((_ctype+1)[(unsigned char)(x)]&(_U))
+#define islower(x)	((_ctype+1)[(unsigned char)(x)]&(_L))
+#define isdigit(x)	((_ctype+1)[(unsigned char)(x)]&(_D))
+#define isxdigit(x)	((_ctype+1)[(unsigned char)(x)]&(_H))
+#define isalnum(x)	((_ctype+1)[(unsigned char)(x)]&(_L|_U|_D))
+#define isspace(x)	((_ctype+1)[(unsigned char)(x)]&(_W))
+#define ispunct(x)	((_ctype+1)[(unsigned char)(x)]&(_P))
+#define iscntrl(x)	((_ctype+1)[(unsigned char)(x)]&(_C))
+#define isprint(x)	((_ctype+1)[(unsigned char)(x)]&(_P|_L|_U|_D|_B))
+#define isgraph(x)	((_ctype+1)[(unsigned char)(x)]&(_P|_L|_U|_D))
+#define isascii(x)	(((x)&0x80)==0)
+
+#define toascii(x) ((x)&0x7f)
+#define _tolower(x) ((x)|0x20)
+#define _toupper(x) ((x)&0x5f)
+
+#endif /* _CTYPE_H */
+
--- a/v52a/INCLUDE/DBG.H
+++ b/v52a/INCLUDE/DBG.H
@ -0,0 +1,114 @@
+/* Copyright (C) 1985 by Manx Software Systems, Inc. */
+
+#define RECORDSIZE	64
+
+#define DBG_MAGIC		0x356e	/* Magic # for relative .dbg files */
+#define	DBG_MAGICROM	0x4d53	/* Magic # for absolute .dbg files */
+#define LINE_MAGIC		0x3039	/* Magic # for line number records */
+#define BLOCK_MAGIC		0x3c48	/* Magic # for block records */
+#define LOCAL_MAGIC		0x3c47	/* Magic # for symbol records */
+
+#define LOCSIZE	6	/* # of local symbols per record */
+#define BLKSIZE	6	/* # of blocks per record */
+#define STRSIZE (RECORDSIZE/sizeof(struct structab)) /* # of structs/record */
+
+struct dbgheader {
+	short h_stsize;				/* 02 */ /* # of struct table entries */
+	short h_stpos;				/* 04 */ /* record # for start of structs */
+	short h_stgsize;			/* 06 */ /* # of string table entries */
+	unsigned short h_stgbytes;	/* 08 */ /* total length of strings */
+	short h_stgpos;				/* 0a */ /* record # for start of strings */
+	short h_linerec;			/* 0c */ /* # of line # records */
+	short h_blkrec;				/* 0e */ /* # of block records */
+	short h_symrec;				/* 10 */ /* # of symbol table records */
+	unsigned short h_abssym;	/* 12 */ /* symbol # of first absolute global */
+	unsigned short h_codesym;	/* 14 */ /* symbol # of first code global */
+	unsigned short h_datasym;	/* 16 */ /* symbol # of first data global */
+};
+
+struct structab {
+	unsigned short st_tag;
+	unsigned short st_size;
+	unsigned short st_first;	/* first member contained in this struct */
+	unsigned short st_last;		/* last member	"" */
+};
+
+/* macros for bit field stuff in localsym records for struct members */
+#define FIELDPACK(pos, wid)	((pos)&0x7f | ((wid)&0x7f)<<8)
+#define GETPOS(x)	((x)&0x7f)
+#define GETWID(x)	((x)>>8 & 0x7f)
+
+/* special flag values for ls_seg */
+#define AUTOFLG	-2		/* auto-variable on the stack */
+#define REGFLG	-3		/* Register variable */
+#define ARGFLG	-4		/* function-parameter on the stack */
+#define AREGFLG	-5		/* Register fucntion-parameter */
+#define TDEFFLG	-6		/* Typedef */
+
+struct localsym {
+	unsigned short ls_name;
+	unsigned short ls_type;
+	short ls_struct;	/* for bit fields, pos and wid */
+	short ls_offset;
+	short ls_seg; 		/* see special flag values above */
+	/* for struct members: 0 for standard members, !0 for bit fields */
+};
+
+struct block {
+	short b_function;		/* function containing this block */
+	unsigned short b_start;	/* start of block (relative to function start) */
+	unsigned short b_end;	/* end of block */
+	unsigned short b_first;	/* first local contained in this block */
+	unsigned short b_last;	/* last local	"" */
+};
+
+#define LINEENTRY (RECORDSIZE-5*sizeof(short))
+
+struct lineinfo {
+	unsigned short l_offset, l_seg;
+	unsigned short l_file;
+	unsigned short l_lnum;
+	unsigned char l_data[LINEENTRY];
+};
+
+/* codes in LINE info blocks */
+#define NEXTREC	0xff	/* line info continues in the next line record */
+#define EXTADDR	0x80	/* if bit on then 15 bit address increment */
+#define EXTMAX	0x7f00	/* largest possible displacement + 1 */
+
+#define db_blk	db_u.u_block
+#define db_syms	db_u.u_syms
+#define db_line db_u.u_line
+#define db_head db_u.u_head
+
+typedef struct {
+	short db_magic;
+	union {
+		struct block u_block[BLKSIZE];
+		struct localsym u_syms[LOCSIZE];
+		struct lineinfo u_line;
+		struct dbgheader u_head;
+		char u_buffer[RECORDSIZE-sizeof(short)];
+	} db_u;
+} dbgrec;
+
+/* type modifiers */
+#define D_PTR	'*'
+#define D_LPTR	'#'
+#define D_ARRAY	'['
+#define D_FUNC	'('
+#define D_FFUNC '{'
+
+/* base type values (always last char of type string) */
+#define D_CHAR	'c'
+#define D_UCHAR	'C'
+#define D_INT	'i'
+#define D_UINT	'I'
+#define D_LONG	'l'
+#define D_ULONG	'L'
+#define D_FLOAT	'f'
+#define D_DOUBLE 'd'
+#define D_VOID	'v'
+#define D_STRUCT ':'	/* type string is followed by struct # */
+
+#define BASETYPES	"cCiIlLfdv:"
--- a/v52a/INCLUDE/DIOCTL.H
+++ b/v52a/INCLUDE/DIOCTL.H
@ -0,0 +1,26 @@
+/* Copyright (C) 1983 by Manx Software Systems */
+
+#define TIOCGETP	0		/* read contents of tty control structure */
+#define TIOCSETP	1		/* set contents of tty control structure */
+#define TIOCSETN	1		/* ditto only don't wait for output to flush */
+
+/* special codes for MSDOS 2.x only */
+#define TIOCREAD	2		/* read control info from device */
+#define TIOCWRITE	3		/* write control info to device */
+#define TIOCDREAD	4		/* same as 2 but for drives */
+#define TIOCDWRITE	5		/* same as 3 but for drives */
+#define GETISTATUS	6		/* get input status */
+#define GETOSTATUS	7		/* get output status */
+
+struct sgttyb {
+	short sg_flags;		/* control flags */
+	char sg_erase;		/* ignored */
+	char sg_kill;		/* ignored */
+};
+
+/* settings for flags */
+#define RAW		0x20	/* no echo or mapping of input/output BDOS(6) */
+
+/* Refer to the MSDOS technical reference for detailed information on
+ * the remaining flags.
+ */
--- a/v52a/INCLUDE/DOS.H
+++ b/v52a/INCLUDE/DOS.H
@ -0,0 +1,14 @@
+/* Copyright 1992 Manx Software Systems, Inc. All rights reserved */
+
+#ifndef __DOS_H
+#define	__DOS_H
+
+int bdos(int _func, int _dx, int _cx);
+int bdosx(int _func, far void *_dsdx, int _cx);
+int dos(int _func, int _bx, int _cx, int _dx, int _di, int _si);
+int dosx(int _func, int _bx, int _cx, void *_dsdx, int _di, int _si);
+int dup(int _oldfd);
+int fcbinit(char *_name, void *_fcb);
+int fdup(int _oldfd, int _newfd);
+
+#endif	/* __DOS_H */
--- a/v52a/INCLUDE/ERRNO.H
+++ b/v52a/INCLUDE/ERRNO.H
@ -0,0 +1,40 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __ERRNO_H 
+#define __ERRNO_H 
+
+extern int errno;
+
+/* MsDos return codes */
+#define EINVAL	1
+#define ENOENT	2
+#define ENOTDIR	3
+#define EMFILE	4
+#define EACCES	5
+#define EBADF	6
+#define EARENA	7
+#define ENOMEM	8
+#define EFAULT	9
+#define EINVENV	10
+#define EBADFMT	11
+#define EINVACC	12
+#define EINVDAT	13
+#define ENODEV	15
+#define ERMCD	16
+#define EXDEV	17
+#define ENOMORE	18
+
+/* additional codes used by Aztec C */
+#define EEXIST	19
+#define ENOTTY	20
+/* used by the math library */
+#define ERANGE	21
+#define EDOM	22
+
+/* non ANSI C definitions */
+
+extern char *_sys_errlist[];
+extern int _sys_nerr;
+
+#endif
+
--- a/v52a/INCLUDE/FCB.H
+++ b/v52a/INCLUDE/FCB.H
@ -0,0 +1,27 @@
+/* Copyright (C) 1982 by Manx Software Systems */
+
+struct fcb {
+	char f_driv;
+	char f_name[8];
+	char f_type[3];
+	char f_ext;
+	char f_resv[2];
+	char f_rc;
+	char f_sydx[16];
+	char f_cr;
+	unsigned f_record; char f_overfl;
+};
+
+#define	OPNFIL	15
+#define CLSFIL	16
+#define DELFIL	19
+#define READSQ	20
+#define WRITSQ	21
+#define MAKFIL	22
+#define SETDMA	26
+#define GETUSR	32
+#define READRN	33
+#define WRITRN	34
+#define FILSIZ	35
+#define SETREC	36
+
--- a/v52a/INCLUDE/FCNTL.H
+++ b/v52a/INCLUDE/FCNTL.H
@ -0,0 +1,83 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+#include <time.h>
+
+#ifndef __FCNTL_H 
+#define __FCNTL_H 
+
+#ifndef _SIZE_T
+#define _SIZE_T
+typedef unsigned int size_t;
+#endif
+
+#define O_RDONLY	0
+#define O_WRONLY	1
+#define O_RDWR		2
+#define O_DENYRW	0x10
+#define O_DENYW		0x20
+#define O_DENYR		0x30
+#define O_DENYN		0x40
+#define O_INHER		0x80
+#define O_COMP		0x00
+#define O_CREAT		0x0100
+#define O_TRUNC		0x0200
+#define O_EXCL		0x0400
+#define O_APPEND	0x0800
+
+#define	O_TEXT		0x1000
+#define	O_ISOPEN	0x2000 /* not for use except in io library */
+#define	O_CONRAW	0x4000
+#define	O_ISTTY		0x8000
+
+#define MAXCHAN	20	/* maximum number of I/O channels *jd 9/8/92 */
+
+int 			_creat(const char *_name, int _mode);
+int 			_open(const char * _name, int _mode, ...);
+int 			_access(char *, int);
+int 			_close(int);
+size_t 			_read(int, void *, size_t);
+size_t 			_write(int, void *, size_t);
+long 			_lseek(int, long, int);
+struct sgttyb;
+int 			_ioctl(int, int, ...);
+int 			_isatty(int);
+int 			_unlink(char *);
+
+int 			creat(const char *_name, int _mode);
+int 			open(const char * _name, int _mode, ...);
+int 			access(char *, int);
+int 			close(int);
+size_t 			read(int, void *, size_t);
+size_t 			write(int, void *, size_t);
+long 			lseek(int, long, int);
+int 			ioctl(int, int, struct sgttyb *);
+int 			isatty(int);
+int 			unlink(char *);
+int 			_csread(int _fd, char *_buff, size_t _size);
+int				filelock(int _fd, int _flag, long _offset, long _len);
+
+void 			_exit(int _code);
+int 			chmod(char *_name, int _attr);
+
+int 			chdir(char *_path);
+char *			getcwd(char *_path, int _size);
+int 			mkdir(char *_name);
+char *			mktemp(char * _template);
+int 			rmdir(char *_dir);
+char *			scdir(char *_pat);
+
+int 			wait(void);
+int 			fexecl(char *_file, char *_arg0, ...);
+int 			fexecv(char *_file, char **_argv);
+
+int 			execl(char *_file, char *_arg0, ...);
+int 			execv(char *_file, char **_argv);
+int 			execlp(char *_file, char *arg0, ...);
+int 			execvp(char *_file, char **_argv);
+
+int				fnsplit(char *_name, char *_drive, char *_dir, 
+							char *_fname, char *_ext);
+int				fnmerge(char *_name, char *_drive, char *_dir, 
+							char *_fname, char *_ext);
+
+#endif
+
--- a/v52a/INCLUDE/FLOAT.H
+++ b/v52a/INCLUDE/FLOAT.H
@ -0,0 +1,73 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __FLOAT_H
+#define __FLOAT_H
+
+#ifdef _FLT_IEEE
+#define FLT_ROUNDS		-1
+#define	FLT_RADIX		2
+#define FLT_MANT_DIG	24
+#define FLT_EPSILON		1.19209290E-07F
+#define FLT_DIG			6
+#define	FLT_MIN_EXP		-125
+#define	FLT_MIN			1.17549435E-38F
+#define FLT_MIN_10_EXP	-37
+#define FLT_MAX_EXP		+128
+#define FLT_MAX			3.40282347E+38F
+#define FLT_MAX_10_EXP	+38
+
+#define DBL_MANT_DIG	53
+#define DBL_EPSILON		2.2204460492503131E-16
+#define DBL_DIG			15
+#define	DBL_MIN_EXP		-1021
+#define	DBL_MIN			2.225073858507201E-308
+#define DBL_MIN_10_EXP	-307
+#define DBL_MAX_EXP		+1024
+#define DBL_MAX			1.797693134862316E+308
+#define DBL_MAX_10_EXP	+308
+
+#define LDBL_MANT_DIG	53
+#define LDBL_EPSILON	2.2204460492503131E-16
+#define LDBL_DIG		15
+#define	LDBL_MIN_EXP	-1021
+#define	LDBL_MIN		2.225073858507201E-308
+#define LDBL_MIN_10_EXP	-307
+#define LDBL_MAX_EXP	+1024
+#define LDBL_MAX		1.797693134862316E+308
+#define LDBL_MAX_10_EXP	+308
+#else
+#define FLT_ROUNDS		-1
+#define	FLT_RADIX		2
+#define FLT_MANT_DIG	24
+#define FLT_EPSILON		1.19209290E-07F
+#define FLT_DIG			6
+#define	FLT_MIN_EXP		-125
+#define	FLT_MIN			1.17549435E-38F
+#define FLT_MIN_10_EXP	-37
+#define FLT_MAX_EXP		+128
+#define FLT_MAX			3.40282347E+38F
+#define FLT_MAX_10_EXP	+38
+
+#define DBL_MANT_DIG	53
+#define DBL_EPSILON		2.2204460492503131E-16
+#define DBL_DIG			15
+#define	DBL_MIN_EXP		-1021
+#define	DBL_MIN			2.225073858507201E-308
+#define DBL_MIN_10_EXP	-307
+#define DBL_MAX_EXP		+1024
+#define DBL_MAX			1.797693134862316E+308
+#define DBL_MAX_10_EXP	+308
+
+#define LDBL_MANT_DIG	53
+#define LDBL_EPSILON	2.2204460492503131E-16
+#define LDBL_DIG		15
+#define	LDBL_MIN_EXP	-1021
+#define	LDBL_MIN		2.225073858507201E-308
+#define LDBL_MIN_10_EXP	-307
+#define LDBL_MAX_EXP	+1024
+#define LDBL_MAX		1.797693134862316E+308
+#define LDBL_MAX_10_EXP	+308
+#endif
+
+#endif
+
--- a/v52a/INCLUDE/GRAPHICS.H
+++ b/v52a/INCLUDE/GRAPHICS.H
@ -0,0 +1,30 @@
+/* Copyright 1992 Manx Software Systems, Inc. All rights reserved */
+
+#ifndef __GRAPHICS_H
+#define	__GRAPHICS_H
+
+#define BLACK	 	0
+#define BLUE	   	1
+#define GREEN	   	2
+#define CYAN	   	3
+#define RED	   		4
+#define MAGENTA		5
+#define YELLOW		6
+#define WHITE		7
+
+#define BLINK	    1
+#define NO_BLINK    0
+#define HIGH		1
+#define LOW			0
+
+void circle(int _x, int _y, int _r);
+void color(int _clr);
+void ground(int _color);
+void line(int _x1, int _y1, int _x2, int _y2);
+void lineto(int _x2, int _y2);
+void mode(int _newmode);
+void palette(int _val);
+void point(int _x, int _y);
+void set_asp(int _x_asp, int _y_asp);
+
+#endif	/* __GRAPHICS_H */
--- a/v52a/INCLUDE/IO.H
+++ b/v52a/INCLUDE/IO.H
@ -0,0 +1,82 @@
+/* Copyright (C) 1982 by Manx Software Systems */
+/*
+ * if MAXCHAN is changed then the initialization of chantab in croot.c
+ * should be adjusted so that it initializes EXACTLY MAXCHAN elements of 
+ * the array.  If this is not done, the I/O library may exhibit
+ * strange behavior.
+ */
+#define MAXCHAN	11	/* maximum number of I/O channels */
+
+/*
+ * argument to device routines.
+ *		this is a typedef to allow future redeclaration to guarantee 
+ *		enough space to store either a pointer or an integer.
+ */
+typedef char *_arg;
+
+/*
+ * device control structure
+ */
+struct device {
+	char d_read;
+	char d_write;
+	char d_ioctl;	/* used by character special devices (eg CON:) */
+	char d_seek;	/* used by random I/O devices (eg: a file) */
+	int (*d_open)();	/* for special open handling */
+};
+
+/*
+ * device table, contains names and pointers to device entries
+ */
+struct devtabl {
+	char *d_name;
+	struct device *d_dev;
+	_arg d_arg;
+};
+
+/*
+ * channel table: relates fd's to devices
+ */
+struct channel {
+	char c_read;
+	char c_write;
+	char c_ioctl;
+	char c_seek;
+	int (*c_close)();
+	_arg c_arg;
+} ;
+extern struct channel chantab[MAXCHAN];
+
+struct fcb {
+	char f_driv;
+	char f_name[8];
+	char f_type[3];
+	char f_ext;
+	char f_resv[2];
+	char f_rc;
+	char f_sydx[16];
+	char f_cr;
+	unsigned f_record; char f_overfl;
+};
+
+struct fcbtab {
+	struct fcb fcb;
+	char offset;
+	char flags;
+	char user;
+};
+
+#define	OPNFIL	15
+#define CLSFIL	16
+#define DELFIL	19
+#define READSQ	20
+#define WRITSQ	21
+#define MAKFIL	22
+#define SETDMA	26
+#define GETUSR	32
+#define READRN	33
+#define WRITRN	34
+#define FILSIZ	35
+#define SETREC	36
+
+#define Wrkbuf ((char *)0x80)
--- a/v52a/INCLUDE/LIMITS.H
+++ b/v52a/INCLUDE/LIMITS.H
@ -0,0 +1,24 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __LIMITS_H 
+#define __LIMITS_H 
+
+#define	CHAR_BIT	8
+#define	SCHAR_MIN	-127
+#define SCHAR_MAX	127
+#define UCHAR_MAX	255U
+#define	CHAR_MIN	SCHAR_MIN
+#define CHAR_MAX	SCHAR_MAX
+#define	MB_LEN_MAX	1
+#define	SHRT_MIN	-32767
+#define SHRT_MAX	+32767
+#define USHRT_MAX	65535U
+#define LONG_MIN	-2147483647
+#define LONG_MAX	+2147483647
+#define ULONG_MAX	4294967295U
+#define INT_MIN		-32767
+#define	INT_MAX		+32767
+#define UINT_MAX	65535U
+
+#endif
+
--- a/v52a/INCLUDE/LMACROS.H
+++ b/v52a/INCLUDE/LMACROS.H
@ -0,0 +1,210 @@
+	nlist
+; Copyright (C) 1985 by Manx Software Systems, Inc.
+; :ts=8
+	ifndef	MODEL
+MODEL	equ	0
+	endif
+	if	MODEL and 1
+	largecode
+FARPROC	equ 1
+FPTRSIZE equ	4
+	else
+FPTRSIZE equ	2
+	endif
+	if	MODEL and 2
+LONGPTR equ 1
+	endif
+
+;this macro to be used on returning
+;restores bp and registers 
+pret	macro
+if havbp
+	pop bp
+endif
+	ret
+	endm
+
+internal macro	pname
+	public	pname
+pname	proc
+	endm
+
+intrdef	macro	pname
+	public	pname
+ifdef FARPROC
+	pname	label	far
+else
+	pname	label	near
+endif
+	endm
+
+procdef	macro	pname, args
+	public pname&_
+ifdef	FARPROC
+	_arg	= 6
+	pname&_	proc	far
+else
+	_arg	= 4
+	pname&_	proc	near
+endif
+ifnb <args>
+	push bp
+	mov bp,sp
+	havbp = 1
+	decll <args>
+else
+	havbp = 0
+endif
+	endm
+
+entrdef	macro	pname, args
+	public pname&_
+ifdef	FARPROC
+	_arg	= 6
+	pname&_:
+else
+	_arg	= 4
+	pname&_:
+endif
+ifnb <args>
+if	havbp
+	push	bp
+	mov	bp,sp
+else
+	error must declare main proc with args, if entry has args
+endif
+	decll <args>
+endif
+	endm
+
+;this macro equates 'aname' to arg on stack
+decl	macro 	aname, type
+;;'byte' or anything else
+havtyp	= 0
+ifidn	<type>,<byte>
+	aname	equ	byte ptr _arg[bp]
+	_arg = _arg + 2
+	havtyp = 1
+endif
+ifidn	<type>,<dword>
+	aname	equ dword ptr _arg[bp]
+	_arg = _arg + 4
+	havtyp = 1
+endif
+ifidn <type>,<cdouble>
+	aname	equ qword ptr _arg[bp]
+	_arg = _arg + 8
+	havtyp = 1
+endif
+ifidn <type>, <ptr>
+	ifdef LONGPTR
+		aname	equ dword ptr _arg[bp]
+		_arg = _arg + 4
+	else
+		aname equ	word ptr _arg[bp]
+		_arg = _arg + 2
+	endif
+	havtyp = 1
+endif
+ifidn <type>, <fptr>
+	ifdef FARPROC
+		aname	equ dword ptr _arg[bp]
+		_arg = _arg + 4
+	else
+		aname equ	word ptr _arg[bp]
+		_arg = _arg + 2
+	endif
+	havtyp = 1
+endif
+ifidn <type>, <word>
+	aname equ	word ptr _arg[bp]
+	_arg = _arg + 2
+	havtyp = 1
+endif
+ife	havtyp
+	error -- type is unknown.
+endif
+	endm
+
+;this macro loads an arg pointer into DEST, with optional SEGment
+ldptr	macro	dest, argname, seg
+ifdef	LONGPTR
+	ifnb <seg>		;;get segment if specified
+		ifidn <seg>,<es>
+			les	dest,argname
+		else
+			ifidn <seg>,<ds>
+				lds dest,argname
+			else
+				mov dest, word ptr argname
+				mov seg, word ptr argname[2]
+			endif
+		endif
+	else
+		ifidn <dest>,<si>		;;si gets seg in ds
+			lds	si, argname
+		else
+			ifidn <dest>,<di>	;;or, es:di
+				les	di, argname
+			else
+				garbage error: no seg for long pointer
+			endif
+		endif
+	endif
+else
+	mov dest, word ptr argname	;;get the pointer
+ENDIF
+	ENDM
+
+decll	macro	list
+	IRP	i,<list>
+	decl i
+	ENDM
+	ENDM
+
+pend	macro	pname
+pname&_	endp
+	endm
+
+retptrm	macro	src,seg
+mov	ax, word ptr src
+ifdef	LONGPTR
+	mov	dx, word ptr src+2
+endif
+	endm
+
+retptrr	macro	src,seg
+mov	ax,src
+ifdef LONGPTR
+	ifnb <seg>
+		mov	dx, seg
+	endif
+endif
+	endm
+
+retnull	macro
+ifdef LONGPTR
+	sub	dx,dx
+endif
+	sub	ax,ax
+ 	endm
+
+pushds	macro
+	ifdef LONGPTR
+	push	ds
+	endif
+	endm
+
+popds	macro
+	ifdef LONGPTR
+	pop	ds
+	endif
+	endm
+
+finish	macro
+codeseg	ends
+	endm
+
+	list
+codeseg	segment	byte public 'code'
+	assume	cs:codeseg
--- a/v52a/INCLUDE/LOCALE.H
+++ b/v52a/INCLUDE/LOCALE.H
@ -0,0 +1,42 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __LOCALE_H 
+#define __LOCALE_H 
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+#define LC_ALL		0
+#define LC_COLLATE	1
+#define LC_CTYPE	2
+#define LC_MONETARY	3
+#define LC_NUMERIC	4
+#define LC_TIME		5
+
+typedef struct lconv {
+	char *decimal_point;		/* "." */
+	char *thousands_sep;		/* "" */
+	char *grouping;				/* "" */
+	char *int_curr_symbol;		/* "" */
+	char *currency_symbol;		/* "" */
+	char *mon_decimal_point;	/* "" */
+	char *mon_thousands_sep;	/* "" */
+	char *mon_grouping;			/* "" */
+	char *positive_sign;		/* "" */
+	char *negative_sign;		/* "" */
+	char int_frac_digits;		/* CHAR_MAX */
+	char frac_digits;			/* CHAR_MAX */
+	char p_cs_precedes;			/* CHAR_MAX */
+	char p_sep_by_space;		/* CHAR_MAX */
+	char n_cs_precedes;			/* CHAR_MAX */
+	char n_sep_by_space;		/* CHAR_MAX */
+	char p_sign_posn;			/* CHAR_MAX */
+	char n_sign_posn;			/* CHAR_MAX */
+} lconv;
+
+char *setlocale(int _category, const char *_locale);
+struct lconv *localeconv(void);
+
+#endif
+
--- a/v52a/INCLUDE/MATH.H
+++ b/v52a/INCLUDE/MATH.H
@ -0,0 +1,49 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __MATH_H
+#define __MATH_H
+
+double atof(const char *);
+double frexp(double, int *);
+double ldexp(double, int);
+double modf(double, double *);
+double cotan(double);
+double log10(double);
+#if 0
+#define pow(x,y) power(x,y)
+#endif
+double log(double);
+double pow(double, double);
+double sqrt(double);
+double fabs(double);
+double fmod(double, double);
+double sin(double);
+double cos(double);
+double tan(double);
+double exp(double);
+double floor(double);
+double ceil(double);
+double sinh(double);
+double cosh(double);
+double tanh(double);
+double asin(double);
+double acos(double);
+double atan(double);
+double atan2(double, double);
+
+#define HUGE_VAL	1.797693134862316E+308
+#define HUGE		HUGE_VAL	
+#define LOGHUGE		(709.778)
+#define TINY_VAL	(2.2e-308)
+#define TINY		TINY_VAL
+#define LOGTINY		(-708.396)
+
+#if !__STDC__ /* non ANSI C functions */
+
+double ran(void);
+double randl(double _x);
+void sran(long _seed);
+
+#endif /* !__STDC__ */
+
+#endif
--- a/v52a/INCLUDE/MCH86.H
+++ b/v52a/INCLUDE/MCH86.H
@ -0,0 +1,23 @@
+/* Copyright 1992 Manx Software Systems, Inc. All rights reserved */
+
+#ifndef __MCH86_H
+#define	__MCH86_H
+
+far void *		abstoptr(long _addr);
+int 			farcall(void (*_func)(void), 
+					struct regs *_inregs, struct regs *_outregs);
+int 			inportb(int _port);
+int 			inportw(int _port);
+void 			outportb(int _port, int _val);
+void 			outportw(int _port, int _val);
+far void *		_ptradd(far void *_lptr, long _val);
+long 			_ptrdiff(far void *_lptr1, far void *_lptr2);
+void 			pokeb(far char *_addr, int);
+void 			pokew(far int *_addr, int);
+unsigned char 	peekb(far char *_addr);	
+unsigned int 	peekw(far int *_addr);
+void 			segread(unsigned *_ptr);
+int 			sysint(int _sint, struct regs *_inregs, struct regs *_outregs);
+
+
+#endif	/* __MCH86_H */
--- a/v52a/INCLUDE/MEMORY.H
+++ b/v52a/INCLUDE/MEMORY.H
@ -0,0 +1,2 @@
+extern char *memcpy(), *memchr(), *memccpy(), memset();
+extern int memcmp();
--- a/v52a/INCLUDE/MODEL.H
+++ b/v52a/INCLUDE/MODEL.H
@ -0,0 +1,7 @@
+#if (sizeof(int (*)()) == 4)
+#define _LARGECODE
+#endif
+
+#if (sizeof(char *) == 4)
+#define _LARGEDATA
+#endif
--- a/v52a/INCLUDE/MONITOR.H
+++ b/v52a/INCLUDE/MONITOR.H
@ -0,0 +1,8 @@
+int 			_intr_sp(int _speed);
+void 			monitor(
+					void (*_lowpc)(), 
+					void (*_highpc)(), 
+					unsigned int *_buf, 
+					int _pockets, 
+					int _nfunc
+				);
--- a/v52a/INCLUDE/OBJ86.H
+++ b/v52a/INCLUDE/OBJ86.H
@ -0,0 +1,255 @@
+/* Copyright (C) 1990 by Manx Software Systems, Inc. - All rights reserved */
+
+/*****************************************************************************
+ OBJ86.H - Aztec 8086 Object Format definitions.
+*****************************************************************************/
+
+/*---------------------------------------------------------------------------
+							OBJECT RECORD TYPES
+---------------------------------------------------------------------------*/
+
+#define SPECIAL	0xf0	/* Mask for primary loader codes */
+#define SPEC2	0x00	/* Value of above mask for debug items */
+#define EXTEND	0x0f	/* Shift-code for extended object records (2-bytes) */
+
+/* PRIMARY LOADER ITEM SET */
+
+#define THEEND	0x00	/* End of the object module */
+
+/* Debugging information types */
+
+#define BLOCKST	0x01	/* block start */
+#define AUTOSYM	0x02	/* auto variable def */
+#define ARGSYM	0x03	/* function argument def */
+#define REGSYM	0x04	/* register variable def */
+#define AREGSYM	0x05	/* register var argument */
+#define STATSYM	0x06	/* static variable def */
+#define FILESYM	0x07	/* file scope static var def */
+#define GBLTYPE	0x08	/* global variable type info */
+#define TDEFSYM	0x09	/* typedef name */
+#define STRCTAG	0x0a	/* structure tag definition */
+#define STRCDEF	0x0b	/* start of structure definition */
+#define SETFILE 0x0c	/* set working file name for line table */
+#define SETLINE 0x0d	/* set current line # */
+
+/* 0x0f reserved for EXTEND shift-code */
+
+/* 'Normal' loader items (may use lower nybble for data) */
+
+#define ABSDATA	0x10	/* Raw data items */
+#define EXPR	0x20	/* Expression to follow */
+#define SMLINT	0x30	/* Small sized integer (generally part of an EXPR) */
+#define SMLNEG	0x40	/* Small sized neg int (generally part of an EXPR) */
+#define MEDINT	0x50	/* Medium sized integer (generally part of an EXPR) */
+#define LCLSYM	0x60	/* Unnamed symbol reference (ex: $20000) */
+#define GBLSYM	0x70	/* Named symbol reference */
+#define SPACE	0x80	/* Blank space (dup (?) in assembly) */
+#define USECOMN	0x90	/* Switch current segment */
+#define CODEREF	0xa0	/* Code reference w/ small offset */
+#define DATAREF 0xb0	/* Data reference w/ small offset */
+#define BSSREF	0xc0	/* BSS reference w/ small offset */
+#define SEGREL	0xd0	/* General segment relative reference */
+
+/* 'Special' loader items (use lower nybble for type code) */
+
+#define DATASEG	0xf0	/* para # of data segment */
+#define BEXPR	0xf1	/* Fixup modifier - byte-sized absolute ref */
+#define BREL	0xf2	/* Fixup modifier - byte-sized self-relative ref */
+#define LRGINT	0xf3	/* Large-sized integer (generally part of an EXPR) */
+#define USECODE	0xf4	/* Switch to code segment */
+#define USEDATA	0xf5	/* Switch to data segment */
+#define STARTAD	0xf6	/* Specify starting address of program */
+#define LRGCODE 0xf7	/* Code reference w/ large offset */
+#define LRGDATA 0xf8	/* Data reference w/ large offset */
+#define INTJSR	0xf9	/* interpreter call instruction (unused on 8086) */
+#define WREL	0xfa	/* Fixup modifier - word-sized self-relative ref */
+#define LRGBSS	0xfb	/* BSS reference w/ large offset */
+#define HUGINT	0xfc	/* Really-large-sized int (generally part of an EXPR) */
+#define LEXPR	0xfd	/* Fixup modifier - 32-bit absolute reference */
+#define CODESEG	0xfe	/* para # of code segment */
+#define NLINE	0xff	/* Increment source code line counter by one */
+
+/*
+   If no Fixup modifier is specified (BREL, BEXPR, etc.) then word-sized
+   absolute is assumed.
+*/
+
+/* EXTENDED LOADER ITEM SET */
+
+/*
+	Extended loader item set (Selected by loader item EXTEND)
+	Codes 01->3f in the extended set are reserved as normal 1-byte IDs
+	Codes 40->f0 in the extended set are reserved as high-nybble IDs, with
+	the low nybble usable for data.
+*/
+#define ORIGIN		0x01	/* Set location to an abs off w/in current seg */
+
+/* LOW-NYBBLE OBJECT RECORD INFORMATION */
+
+/* within STRCDEF the following are used */
+#define MEMBDEF		0x01	/* structure member info */
+#define FLDDEF		0x02	/* bit field member */
+
+/* low nibble of EXPR item (operators) */
+#define ADD	1
+#define SUB	2
+#define MUL	3
+#define DIV	4
+#define MOD	5
+#define AND	6
+#define OR	7
+#define XOR	8
+#define RSH	9
+#define LSH	10
+#define NOT	11 /* must be the first unary op, and only unarys may follow */
+#define NEG	12
+#define OHIGH 13
+#define OLOW 14
+#define OSEG 15
+
+/*---------------------------------------------------------------------------
+							MODULE MAGIC NUMBERS
+---------------------------------------------------------------------------*/
+
+#define M_MAGIC		0x5466				/* Small code object module */
+#define M_LMAGIC	0x020c				/* Large code object module */
+#define M_OVROOT	((short)0xcf56)		/* Root symbol table (overlay) */
+#define M_LIBRARY	((short)0xec62)		/* Object code library */
+
+/*---------------------------------------------------------------------------
+					  LIBRARY AND MODULE HEADER RECORDS
+---------------------------------------------------------------------------*/
+
+/* Header record for an object module */
+struct module {
+	short m_magic;			/* magic number for object files */
+	char m_name[8];			/* module name */
+	unsigned short m_code;	/* size of code in this module */
+	unsigned short m_data;	/* size of data in this module */
+	unsigned short m_static;/* size of static storage (bss) in this module */
+	unsigned short m_global;/* offset of start of global symbols */
+	short m_nglobal;		/* # of global symbols */
+	unsigned short m_local;	/* offset of start of local symbols */
+	short m_nlocal;			/* # of local symbols */
+	unsigned short m_end;	/* end of local symbols */
+	unsigned short m_next;	/* offset of next module in this file */
+	unsigned short m_nfix;	/* number of segment fixes required */
+};
+
+#define LBSIZE (2048-2*sizeof(short))
+
+/* Header record for a library file */
+struct newlib {
+	short nl_magic;		/* magic number for library files */
+	unsigned short nl_next;	/* location of next dictionary block */
+	char nl_dict[LBSIZE];		/* dictionary buffer */
+	/* the format of the dictionary is:
+		two bytes - (position of module defining symbol) / 128
+		nul terminated string - name of symbol
+	*/
+};
+
+/*---------------------------------------------------------------------------
+					  NAMED AND UNNAMED SYMBOL STRUCTURE
+---------------------------------------------------------------------------*/
+
+struct symtab {
+	char s_type,s_flags;
+	unsigned short s_value;
+};
+
+/*
+	symbol table entry is followed by a segment or group # if the SF_HAVSEG
+	flag is set.
+
+	Global symbols are followed by a nul terminated string which is the
+	name of the symbol.
+*/
+
+/*---------------------------------------------------------------------------
+					  SYMBOL TYPES AND FLAGS
+---------------------------------------------------------------------------*/
+
+/* S_TYPE FIELD VALUES FOR SYMBOLS/SEGMENTS */
+#define S_ABS		1		/* Equ-type absolute symbols & abs segments */
+#define S_CODE		2		/* Item in code segment */
+#define S_DATA		3		/* Item in data segment */
+#define S_COMN		4		/* common segment (obsolete) */
+#define S_CMNREF	5		/* Item in a general segment */
+
+#define S_ROOTSYM	6		/* used by DOS linker to tag root symbols */
+#define S_ABSOLUTE	6		/* used by ROM linker to designate absolute syms */
+
+#define S_EXPR		6		/* Used internally by assembler */
+#define S_UND		7		/* Symbol is undefined or BSS */
+#define S_WEAK		8		/* Currently unused */
+#define S_BSS		9		/* Symbol is BSS */
+#define S_GROUP		10		/* Group */
+#define S_PSEG		11		/* public segment */
+#define S_SSEG		12		/* stack segment */
+#define S_MSEG		13		/* memory segment */
+#define S_CSEG		14		/* common segment (new form) */
+#define S_CLASS		15		/* segment class name */
+
+#define ST_TYPE		0x0f	/* Mask for type portion of a symbol */
+
+/* S_TYPE FIELD MODIFIERS (SEGMENTS) */
+
+#define ST_ALIGN	0x70	/* Mask for alignment type (for segments) */
+
+#define ST_BYTE		0x00	/* alignment boundarys (byte) */
+#define ST_WORD		0x10	/* even */
+#define ST_PARA		0x20	/* 16-byte */
+#define ST_PAGE		0x30	/* 256-byte */
+#define ST_INPAGE	0x40	/* Must fit completely within 256 byte page */
+#define	ST_ABSSEG	0x70	/* segment @ absolute address */
+#define ST_BIGSEG	0x80	/* set for 64k segment */
+
+/* S_FLAGS FIELD VALUES (MIXED SEGMENT/NON-SEGMENT) */
+
+#define SF_HAVEAT	0x01	/* Segment followed by par # (seg only) */
+#define SF_HAVTYPE	0x01	/* symbol is followed by type info (sym only) */
+
+#define SF_DATAREF	0x02	/* used for dataseg references */
+#define SF_HAVCLAS	0x04	/* symbol is followed by class index */
+#define SF_GLOBL 	0x08	/* symbol is public/extern */
+#define SF_HAVSEG	0x10	/* symbol is followed by segment/group # */
+#define SF_OVSYM	0x20	/* overlay symbol */
+#define S_FIXED		0x40
+#define S_UNNAMED	0x80
+
+/*
+						TYPICAL DATA DECLATAIONS
+						------------------------
+
+	extern code:
+		    Declaration: extern int func();
+				 s_type: S_UND
+				s_flags: S_FIXED | SF_GLOBL
+				s_value: always 0
+
+	defined code:
+		    Declaration: int func() { }
+				 s_type: S_CODE
+				s_flags: S_FIXED | SF_GLOBL
+				s_value: offset from the base of the module's code segment
+
+	extern data:
+		    Declaration: extern int an_int;
+				 s_type: S_UND
+				s_flags: S_FIXED | SF_GLOBL
+				s_value: always 0
+
+	defined BSS data:
+		    Declaration: int an_int;
+				 s_type: S_DATA
+				s_flags: S_FIXED | SF_GLOBL | SF_DATAREF
+				s_value: size of the object
+
+	defined init data:
+		    Declaration: int an_int = 5;
+				 s_type: S_DATA
+				s_flags: S_FIXED | SF_GLOBL | SF_DATAREF
+				s_value: offset from the base of the module's data segment
+
+*/
--- a/v52a/INCLUDE/SETJMP.H
+++ b/v52a/INCLUDE/SETJMP.H
@ -0,0 +1,14 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __SETJMP_H
+#define __SETJMP_H
+
+#define __JBUFSIZE	(6*sizeof(char *))
+
+typedef char jmp_buf[__JBUFSIZE];
+
+int setjmp(jmp_buf _env);
+void longjmp(jmp_buf _env, int _val);
+
+#endif
+
--- a/v52a/INCLUDE/SGTTY.H
+++ b/v52a/INCLUDE/SGTTY.H
@ -0,0 +1,52 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __SGTTY_H
+#define __SGTTY_H
+
+#define TIOCGETP	0		/* read contents of tty control structure */
+#define TIOCSETP	1		/* set contents of tty control structure */
+#define TIOCSETN	1		/* ditto only don't wait for output to flush */
+
+struct sgttyb {
+	char sg_erase;		/* ignored */
+	char sg_kill;		/* ignored */
+	short sg_flags;		/* control flags */
+};
+
+/* settings for flags */
+#define _VALID	0x3a
+#define RAW		0x20	/* no echo or mapping of input/output BDOS(6) */
+#define CRMOD	0x10	/* map input CR to NL, output NL to CR LF */
+#define ECHO	0x08	/* ignored unless CBREAK is set */
+#define CBREAK	0x02	/* input using BDOS(1), unless echo off then */
+						/* same as RAW */
+
+#if 0	/* Not yet implemented */
+#define	TIOCNTLC	3	/* check for control C */
+#define TIOCGETC	4	/* get tchars structure */
+#define TIOCSETC	5	/* set tchars structure */
+#define TIOCFLUSH	6	/* flush input/typeahead queues */
+
+/* settings for flags */
+#define	TABSIZ	0x000f	/* size of tab if XTABS is set */
+#define	XTABS	0x0010	/* convert tabs to spaces on output */
+#define	CRMOD	0x0020	/* CR -> LF on input, LF -> CR/LF on output */
+#define	ECHO	0x0040	/* echo input to output */
+#define	ECHOE	0x0080	/* follow erase character by space, BS */
+#define	CBREAK	0x0100	/* don't wait for the whole line */
+#define	NODELAY	0x0200	/* return even if no characters */
+#define RAW		0x0400	/* no input or output mapping at all */
+#define	CHKKEY	0x0800	/* check for keyboard characters during output */
+#define	ERASE	0x1000	/* erase character space before drawing */
+
+struct tchars {
+	char t_intrc;		/* interrupt - ^C (not [yet] implemented) */
+	char t_quitc;		/* quit - ^\ (not [yet] implemented) */
+/*	char t_startc;		/* start output (not supported) */
+/*	char t_stop;		/* stop output (not supported) */
+	char t_eofc;		/* end-of-file - ^D */
+/*	char t_brck;		/* input delimiter (like nl) (not supported) */
+};
+#endif
+
+#endif
--- a/v52a/INCLUDE/SIGNAL.H
+++ b/v52a/INCLUDE/SIGNAL.H
@ -0,0 +1,25 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __SIGNAL_H
+#define __SIGNAL_H
+
+typedef char sig_atomic_t;
+
+#define SIGINT	1
+#define SIGTERM	2
+#define SIGABRT	3
+#define SIGFPE	4
+#define SIGILL	5
+#define SIGSEGV	6
+
+#define _NUMSIG	6
+#define _FSTSIG	1
+
+#define SIG_DFL	((void (*)(int))0)
+#define SIG_IGN	((void (*)(int))1)
+#define SIG_ERR	((void (*)(int))-1)
+
+void (*signal(int _sig, void (*_func)(int)))(int);
+int raise(int _sig);
+
+#endif
--- a/v52a/INCLUDE/STAT.H
+++ b/v52a/INCLUDE/STAT.H
@ -0,0 +1,36 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __STAT_H 
+#define __STAT_H 
+struct stat {
+	char st_attr;			/* file's attributes */
+	long st_mtime;			/* date&time file was created or last modified */
+	long st_size;			/* size of file, in bytes */
+};
+
+/* settings of the st_attr field */
+#define ST_RDONLY	0x01	/* read only file */
+#define ST_HIDDEN	0x02	/* hidden file */
+#define ST_SYSTEM	0x04	/* system file */
+#define ST_VLABEL	0x08	/* volume label */
+#define ST_DIRECT	0x10	/* file is a sub-directory */
+#define ST_ARCHIV	0x20	/* set when file has been written and closed */
+
+/* the format of the st_mtime field is:
+	<   year    > < month> <  day  >  < hours > <  minutes > < sec/2 >
+	3 3 2 2 2 2 2 2  2 2 2 2 1 1 1 1  1 1 1 1 1 1 0 0  0 0 0 0 0 0 0 0
+	1 0 9 8 7 6 5 4  3 2 1 0 9 8 7 6  5 4 3 2 1 0 9 8  7 6 5 4 3 2 1 0
+
+where:
+	year is from 0-119 for 1980-2099
+	month is 1-12
+	day is 1-31
+	hours is 0-23
+	minutes is 0-59
+	sec/2 is 0-29
+*/
+
+int stat(char *_file, struct stat *_sp);
+
+#endif
+
--- a/v52a/INCLUDE/STDARG.H
+++ b/v52a/INCLUDE/STDARG.H
@ -0,0 +1,11 @@
+/* Copyright Manx Software Systems, Inc. 1990.  All rights reserved */
+
+#ifndef __STDARG_H
+#define __STDARG_H
+
+typedef char *va_list;
+#define va_start(ap, parmN) ((ap) = (char *)(&parmN + 1))
+#define va_arg(ap, type) ((ap) += sizeof(type), ((type *)(ap))[-1])
+#define va_end(ap)
+
+#endif
--- a/v52a/INCLUDE/STDDEF.H
+++ b/v52a/INCLUDE/STDDEF.H
@ -0,0 +1,30 @@
+/* Copyright 1990 Manx Software Systems, Inc */
+
+#ifndef __STDDEF_H 
+#define __STDDEF_H
+
+#ifndef _SIZE_T
+#define _SIZE_T
+typedef unsigned int size_t;
+#endif
+
+#ifndef _PTRDIFF_T
+#define _PTRDIFF_T
+typedef int ptrdiff_t;
+#endif
+
+#ifndef _WCHAR_T
+#define _WCHAR_T
+typedef char wchar_t;
+#endif
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+extern int errno;
+
+#define offsetof(type,memb) ((size_t)((unsigned long)&((type *)0)->memb))
+
+#endif
+
--- a/v52a/INCLUDE/STDIO.H
+++ b/v52a/INCLUDE/STDIO.H
@ -0,0 +1,133 @@
+/* Copyright 1989 Manx Software Systems, Inc. All rights reserved */
+
+#ifndef __STDIO_H
+#define	__STDIO_H
+
+#include <stdarg.h>
+
+#ifndef _SIZE_T
+#define _SIZE_T
+  typedef unsigned int size_t;
+#endif
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+#define BUFSIZ 1024
+
+#define EOF (-1)
+
+#define L_tmpnam 40
+#define FOPEN_MAX 20	/* must agree with MAXCHAN in fcntl.h */
+#define FILENAME_MAX 126
+#define TMP_MAX 25
+
+#define SEEK_SET 0	/* from beginning of file */
+#define SEEK_CUR 1	/* from current position */
+#define SEEK_END 2	/* from end of file */
+
+#define stdin (&_iob[0])
+#define stdout (&_iob[1])
+#define stderr (&_iob[2])
+
+typedef long int fpos_t;
+
+typedef struct __stdio {
+	unsigned char *_bp;			/* current position in buffer */
+	unsigned char *_bend;		/* last character in buffer + 1 */
+	unsigned char *_buff;		/* address of buffer */
+	unsigned short _flags;		/* open mode, etc. */
+	char _unit;					/* fd returned by open */
+	unsigned char _bytbuf;		/* single byte buffer for unbuffered streams */
+	size_t _buflen;				/* length of buffer */
+	unsigned short _tmpnum;		/* name of file for temporaries */
+} FILE;
+extern FILE _iob[];
+
+#define _IOMYBUF	0x0001	/* malloced buffer */
+#define _IOEOF		0x0002	/* end-of-file encountered */
+#define _IOERR		0x0004	/* error occurred */
+#define _IOSTRNG	0x0008	/* special string stream */
+#define _IOBIN		0x0010	/* file is binary ("b") */
+#define _IOLBF		0x0020	/* line buffered */
+#define _IOFBF		0x0040	/* fully buffered */
+#define _IONBF		0x0080	/* completely unbuffered */
+#define _IOCON		0x0100	/* console device */
+#define _IOR		0x0200	/* stream opened in read mode */
+#define _IOW		0x0400	/* stream opened in write mode */
+#define _IORW		0x0800	/* stream opened in update mode */
+#define _IOUNG		0x1000	/* ungetc was called */
+#define _IOSYNC 	0x2000	/* MPW compatibility */
+#define _IODIRTY	0x4000	/* buffer has been written */
+
+int remove(const char *_filename);
+int rename(const char *_old, const char *_new);
+FILE *tmpfile(void);
+char *tmpnam(char *_s);
+int fclose(FILE *_stream);
+int fflush(FILE *_stream);
+FILE *fopen(const char *_filename, const char *_mode);
+FILE *freopen(const char *_filename, const char *_mode, FILE *_stream);
+void setbuf(FILE *_stream, char *_buf);
+int setvbuf(FILE *_stream, char *_buf, int _mode, size_t _size);
+int fprintf(FILE *_stream, const char *_format, ...);
+int fscanf(FILE *_stream, const char *_format, ...);
+int printf(const char *_format, ...);
+int scanf(const char *_format, ...);
+int sprintf(char *_s, const char *_format, ...);
+int sscanf(const char *_s, const char *_format, ...);
+int vfprintf(FILE *_stream, const char *_format, va_list _arg);
+int vprintf(const char *_format, va_list _arg);
+int vsprintf(char *_s, const char *_format, va_list _arg);
+int fgetc(FILE *_stream);
+char *fgets(char *_s, int _n, FILE *_stream);
+int fputc(int _c, FILE *_stream);
+int fputs(const char *_s, FILE *_stream);
+int getc(FILE *_stream);
+int getchar(void);
+char *gets(char *_s);
+int putc(int _c, FILE *_stream);
+int putchar(int _c);
+int puts(const char *_s);
+int ungetc(int _c, FILE *_stream);
+size_t fread(void *_ptr, size_t _size, size_t _nmemb, FILE *_stream);
+size_t fwrite(const void *_ptr, size_t _size, size_t _nmemb, FILE *_stream);
+int fgetpos(FILE *_stream, fpos_t *_pos);
+int fseek(FILE *_stream, long int _offset, int _whence);
+int fsetpos(FILE *_stream, const fpos_t *_pos);
+long int ftell(FILE *_stream);
+void rewind(FILE *_stream);
+void clearerr(FILE *_stream);
+int feof(FILE *_stream);
+int ferror(FILE *_stream);
+void perror(const char *_s);
+
+#ifdef __C_MACROS__
+#define getc(fp)	(((fp)->_flags & (_IOBIN|_IOSTRNG)) ? _getc(fp) : _agetc(fp))
+#define putc(c,fp)	(((fp)->_flags & (_IOBIN|_IOSTRNG)) ? _putc(c,fp) : _aputc(c,fp))
+#define getchar() getc(stdin)
+#define putchar(c) putc((c), stdout)
+#define clearerr(fp) ((void)((fp)->_flags &= ~(_IOERR|_IOEOF)))
+#define feof(fp) ((fp)->_flags&_IOEOF)
+#define ferror(fp) ((fp)->_flags&_IOERR)
+#endif
+
+int _flsbuf(FILE *, int);
+int _filbuf(FILE *);
+
+#if !__STDC__ /* non ANSI C user-visible stuff */
+
+FILE *		fdopen(int, const char *);
+#define fileno(fp) ((int)(fp)->_unit)
+#define puterr(c)	(putc((c),stderr))
+
+int			format(int (*_func)(int), const char *_fmt, va_list _varargs);
+
+int 		putw(int _w, FILE *_stream);
+int 		getw(FILE *_stream);
+
+#endif /* !__STDC__ */
+
+#endif /* _STDIO_H */
+
--- a/v52a/INCLUDE/STDLIB.H
+++ b/v52a/INCLUDE/STDLIB.H
@ -0,0 +1,93 @@
+/* Copyright 1989 Manx Software Systems, Inc. All rights reserved */
+
+#ifndef __STDLIB_H
+#define __STDLIB_H
+
+# ifndef _SIZE_T
+# define _SIZE_T
+  typedef unsigned int size_t;
+# endif
+
+#ifndef _WCHAR_T
+#define _WCHAR_T
+typedef char wchar_t;
+#endif
+
+# ifndef ERANGE
+#define ERANGE 21	/* Was 13 */
+# endif
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+#define EXIT_FAILURE (-1)
+#define EXIT_SUCCESS 0
+
+#define HUGE_VAL	1.797693134862316E+308
+
+#define RAND_MAX 32767
+
+#define	MB_CUR_MAX	1
+#define	MB_LEN_MAX	1
+
+typedef struct {
+	int quot;
+	int rem;
+} div_t;						/* quotient and remainder for div() */
+
+typedef struct {
+	long quot;
+	long rem;
+} ldiv_t;						/* quotient and remainder for ldiv() */
+
+double atof(const char *_nptr);
+int atoi(const char *_nptr);
+long int atol(const char *_nptr);
+double strtod(const char *_nptr, char **_endptr);
+long int strtol(const char *_nptr, char **_endptr, int _base);
+unsigned long int strtoul(const char *_nptr, char **_endptr, int _base);
+
+int rand(void);
+void srand(unsigned int _seed);
+
+void *calloc(size_t _nmemb, size_t _size);
+void free(void *_ptr);
+void *malloc(size_t _size);
+void *realloc(void *_ptr, size_t _size);
+
+void abort(void);
+int atexit(void (*_func)(void));
+void exit(int _status);
+char *getenv(const char *_name);
+int system(const char *_string);
+
+void *bsearch(const void *_key, const void *_base, size_t _nmemb, size_t _size,
+								int (*_compar)(const void *, const void *));
+void qsort(void *_base, size_t _nmemb, size_t _size,
+								int (*_compar)(const void *, const void *));
+
+int abs(int _j);
+div_t div(int _numer, int _denom);
+long int labs(long int _j);
+ldiv_t ldiv(long int _numer, long int _denom);
+
+int mblen(const char *_s, size_t _n);
+int mbtowc(wchar_t *_pwc, const char *_s, size_t _n);
+int wctomb(char *_s, wchar_t _wchar);
+size_t mbstowcs(wchar_t *_pwcs, const char *_s, size_t _n);
+size_t wcstombs(char *_s, const wchar_t *_pwcs, size_t _n);
+
+#if !__STDC__
+/* non ANSI C functions */
+void ftoa(double _val, char *_buf, int, int);
+void *lfind(const void *_key, const void *_base, 
+	size_t *_num, size_t _width, int (*_fcmp)(const void *, const void *));
+void *lsearch(const void *_key, const void *_base, 
+	size_t *_num , size_t _width, int (*_fcmp)(const void *, const void *));
+int max(int _x1, int _x2);
+int min(int _x1, int _x2);
+long double strtold(const char *_nptr, char **_endptr);
+#endif	/* !__STDC__ */
+
+#endif	/* _STDLIB_H */
--- a/v52a/INCLUDE/STRING.H
+++ b/v52a/INCLUDE/STRING.H
@ -0,0 +1,57 @@
+/* Copyright 1989 Manx Software Systems, Inc. All rights reserved */
+
+#ifndef __STRING_H
+#define __STRING_H
+
+#ifndef _SIZE_T
+#define _SIZE_T
+typedef unsigned int size_t;
+#endif
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+void *memcpy(void *_dst, const void *_src, size_t _n);
+void *memmove(void *_dst,const void *_src, size_t _n);
+char *strcpy(char *_dst, const char *_src);
+char *strncpy(char *_dst, const char *_src, size_t _n);
+char *strcat(char *_dst, const char *_src);
+char *strncat(char *_dst, const char *_src, size_t _n);
+
+void *memchr(const void *_s, int _c, size_t _n);
+void *memset(void *_s, int _c, size_t _n);
+int memcmp(const void *_s1, const void *_s2, size_t _n);
+int strcmp(const char *_s1, const char *_s2);
+int strncmp(const char *_s1, const char *_s2, size_t _n);
+char *strpbrk(const char *_s1, const char *_s2);
+char *strchr(const char *_s, int _c);
+char *strrchr(const char *_s, int _c);
+char *strstr(const char *_s1, const char *_s2);
+char *strtok(char *_s1, const char *_s2);
+char *strerror(int _errnum);
+size_t strcspn(const char *_s1, const char *_s2);
+size_t strlen(const char *_s);
+size_t strspn(const char *_s1, const char *_s2);
+int strcoll(const char *_s1, const char *_s2);
+size_t strxfrm(char *_s1, const char *_s2, size_t _n);
+
+#if !__STDC__ /* non ANSI C functions */
+
+void *memccpy(void *_dst, const void *_src, int _c, size_t _n);
+void  movblock(far char *_src, far char *_dest, int _len);
+void  movmem(const void *_src, void *_dest, int _len);
+char *index(char *_s, int _c);
+char *rindex(char *_s, int _c);
+void  setmem(void *_area, int _len, int _val);
+void  swapmem(void *_s1, void *_s2, size_t _n);
+char *strdup(char *_s);
+int   stricmp(const char *_str1, const char *_str2);
+char *strlwr(char *_str);
+int   strnicmp(const char *_str1, const char *_str2, int _max);
+char *strrev(char *_str);
+
+#endif /* !__STDC__ */
+
+#endif /* _STRING_H */
+
--- a/v52a/INCLUDE/TIME.H
+++ b/v52a/INCLUDE/TIME.H
@ -0,0 +1,58 @@
+/* Copyright 1990 Manx Software Systems, Inc */
+
+#ifndef __TIME_H
+#define __TIME_H
+
+#ifndef __STDDEF_H
+#include <stddef.h>
+#endif
+
+#define CLOCKS_PER_SEC 100	/* clock() ticks per second */
+
+typedef unsigned long clock_t;
+typedef unsigned long time_t;
+
+struct tm {
+	int tm_sec;		/* seconds after the minute [0,60] */
+	int tm_min;		/* minutes after the hour [0,59] */
+	int tm_hour;	/* hours since midnight [0,23] */
+	int tm_mday;	/* day of the month [1,31] */
+	int tm_mon;		/* months since jan [0,11] */
+	int tm_year;	/* years since 1900 */
+	int tm_wday;	/* days since sunday [0,6] */
+	int tm_yday;	/* days since jan 1 [0,365] */
+	int tm_isdst;	/* pos if DST in effect; 0 if not; neg if can't tell */
+	int tm_hsec;	/* hundreths of second; not in ANSI C */
+};
+
+clock_t clock(void);
+double difftime(time_t _time1, time_t _time2);
+time_t mktime(struct tm *_timeptr);
+time_t time(time_t *_timer);
+char *asctime(const struct tm *_timeptr);
+char *ctime(const time_t *_timer);
+struct tm *gmtime(const time_t *_timer);
+struct tm *localtime(const time_t *_timer);
+size_t strftime(char *_s, size_t _maxsize, const char *_format,
+												const struct tm *_timeptr);
+
+#if !__STDC__
+
+struct ft {
+	unsigned	sec		: 5,
+				min		: 6,
+				hour	: 5,
+				day		: 5,
+				month	: 4,
+				year	: 7;
+};
+
+void			dostime(struct tm *_buf);
+struct tm *		TimeFile2TM(struct ft *);
+struct ft *		TimeTM2File(struct tm *);
+int 			utime(char *_name, struct utimebuf *_timeptr);
+
+#endif	/* !__STDC__ */
+
+#endif
+
--- a/v52a/LIB/86SUP/BRKC.ASM
+++ b/v52a/LIB/86SUP/BRKC.ASM
@ -0,0 +1,15 @@
+; :ts=8
+;Copyright (C) 1983 by Manx Software Systems
+	include	lmacros.h
+
+ifdef FARPROC
+	extrn	_brk_:far
+else
+	extrn	_brk_:near
+endif
+
+	procdef brk
+	jmp	_brk_
+	pend	brk
+	finish
+	end
--- a/v52a/LIB/86SUP/CLSWIT.ASM
+++ b/v52a/LIB/86SUP/CLSWIT.ASM
@ -0,0 +1,52 @@
+; Copyright (C) 1983, 85 by Manx Software Systems
+; :ts=8
+	include lmacros.h
+	public $clswt
+
+$clswt	proc
+	pop	bx			; get address of table
+ifdef FARPROC
+	pop	es
+endif
+	push	di
+	push	si
+	mov	si,bx			; save base address
+	dec	cx
+	mov	di,cx			; save number of entries in di
+ltop:
+ifdef FARPROC
+	cmp	ax,es:word ptr [bx]
+	jne	notit
+	cmp	dx,es:word ptr 2[bx]
+	je	found
+else
+	cmp	ax,cs:word ptr [bx]
+	jne	notit
+	cmp	dx,cs:word ptr 2[bx]
+	je	found
+endif
+notit:
+	add	bx,4
+	loop	ltop
+found:
+	shl	di,1
+	shl	di,1			; adjust di for length of values
+	add	di,si			; di now points at array of labels
+	sub	bx,si			; find which entry matched
+	shr	bx,1			; divide by 2 to get offset to label
+ifdef FARPROC
+	mov	ax,es:word ptr [di][bx]	; get address to return to
+	pop	si
+	pop	di
+	push	es
+	push	ax
+	ret
+else
+	mov	ax,cs:word ptr [di][bx]	; get address to return to
+	pop	si
+	pop	di
+	jmp	ax
+endif
+$clswt	endp
+	finish
+	end
--- a/v52a/LIB/86SUP/CROOT.ASM
+++ b/v52a/LIB/86SUP/CROOT.ASM
@ -0,0 +1,256 @@
+codeseg segment para public 'code'
+dataseg segment para public 'data'
+dataseg ends
+	assume cs:codeseg,ds:dataseg,es:dataseg,ss:dataseg
+;/* Copyright (C) 1981,1982, 1983 by Manx Software Systems */
+;#include "errno.h"
+;#include "fcntl.h"
+;
+;static char **Argv;
+;static int Argc;
+;
+;extern int _ioflg[];
+;
+;_Croot(cp, first)
+;register char *cp;
+# 10 'croot.c'
+^| $3
+	public _Croot_
+_Croot_ proc	near
+ifdef $20004
+	push bp
+	mov bp,sp
+endif
+ifdef $20001
+	add sp,$20001
+endif
+ifdef	$20002
+	push	di
+endif
+ifdef $20003
+	push	si
+endif
+;{
+	mov si,4[bp]
+;	register char **cpp;
+;	char *_sbrk();
+;#ifdef REDIR
+;
+;	/* start the timer */
+;
+;	(void)_clock(0);
+~ cpp di "**c"
+~ cp si "*c"
+~~ first 6 "i"
+^^^^^^^^^^^	mov	ax,00H
+	push	ax
+	call	near ptr _clock_
+	pop	cx
+;
+;	_ioflg[0] = _ioflg[1] = _ioflg[2] = O_TEXT;
+^^	mov	ax,01000H
+	mov	 word ptr _ioflg_+4,01000H
+	mov	 word ptr _ioflg_+2,ax
+	mov	 word ptr _ioflg_,ax
+;	_ioflg[0] |= _isatty(0) ? O_ISTTY:0;	/* set flag for i/o routines */
+^	mov	ax,00H
+	push	ax
+	call	near ptr _isatty_
+	pop	cx
+	test	ax,ax
+	beq 	$20005
+	mov	ax,08000H
+	jmp $20006
+$20005:
+	mov	ax,00H
+$20006:
+	or 	ax, word ptr _ioflg_
+	mov	 word ptr _ioflg_,ax
+;	_ioflg[1] |= _isatty(1) ? O_ISTTY:0;	/* set flag for i/o routines */
+^	mov	ax,01H
+	push	ax
+	call	near ptr _isatty_
+	pop	cx
+	test	ax,ax
+	beq 	$20007
+	mov	ax,08000H
+	jmp $20008
+$20007:
+	mov	ax,00H
+$20008:
+	or 	ax, word ptr _ioflg_+2
+	mov	 word ptr _ioflg_+2,ax
+;	_ioflg[2] |= _isatty(2) ? O_ISTTY:0;	/* set flag for i/o routines */
+^	mov	ax,02H
+	push	ax
+	call	near ptr _isatty_
+	pop	cx
+	test	ax,ax
+	beq 	$20009
+	mov	ax,08000H
+	jmp $20010
+$20009:
+	mov	ax,00H
+$20010:
+	or 	ax, word ptr _ioflg_+4
+	mov	 word ptr _ioflg_+4,ax
+;
+;	Argv = (char **)_sbrk((first+1)*sizeof(char *));
+^^	mov	ax,word ptr 6[bp]
+	shl	ax,1
+	inc	ax
+	inc	ax
+	push	ax
+	call	near ptr _sbrk_
+	pop	cx
+	mov	 word ptr Argv_,ax
+;	Argv[0] = "";
+^	mov	ax, offset $20000+0
+	mov	bx, word ptr Argv_
+	mov	word ptr [bx], offset $20000+0
+;	cpp = &Argv[Argc = first];
+^	mov	ax,word ptr 6[bp]
+	mov	 word ptr Argc_,ax
+	shl	ax,1
+	mov	di, word ptr Argv_
+	add	di,ax
+
+;	for (;;) {
+^$6:
+;		while (*cp == ' ' || *cp == '\t')
+^$7:
+	cmp	byte ptr [si],020H
+	beq 	$20011
+	cmp	byte ptr [si],09H
+	bne 	$8
+$20011:
+;			++cp;
+^	inc	si
+	jmp $7
+$8:
+;		if (*cp == 0)
+^;			break;
+	cmp	byte ptr [si],0
+	beq 	$5
+;#ifdef REDIR
+;		{
+^^^^^^^^^^^^^^^^^^^^^
+^^^^^;			*cpp++ = cp;
+^	mov	word ptr [di],si
+	inc	di
+	inc	di
+;			Argc++;
+^	inc	 word ptr Argc_
+;			if (_sbrk(sizeof(char *)) == (char *)-1) {
+^	mov	ax,02H
+	push	ax
+	call	near ptr _sbrk_
+	pop	cx
+	cmp	ax,0ffffH
+	bne 	$9
+;				_write(2, "Too many args.", 14);
+^	mov	ax,0eH
+	push	ax
+	mov	ax, offset $20000+1
+	push	ax
+	mov	ax,02H
+	push	ax
+	call	near ptr _write_
+	add sp,6
+;				_exit(200);
+^	mov	ax,0c8H
+	push	ax
+	call	near ptr _exit_
+	pop	cx
+;			}
+^;			while (*++cp)
+$9:
+^$10:
+	inc	si
+	cmp	byte ptr [si],0
+	beq 	$11
+;				if (*cp == ' ' || *cp == '\t') {
+^	mov	al,byte ptr [si]
+	cmp	al,020H
+	beq 	$20012
+	cmp	al,09H
+	bne 	$12
+$20012:
+;					*cp++ = 0;
+^	mov	byte ptr [si],00H
+	inc	si
+;					break;
+^	jmp $11
+;				}
+^;		}
+$12:
+	jmp $10
+$11:
+^;	}
+^$4:
+	jmp $6
+$5:
+;	*cpp = 0;
+^	mov	word ptr [di],00H
+;	main(Argc,Argv);
+^	push	 word ptr Argv_
+	push	 word ptr Argc_
+	call	near ptr main_
+	add sp,4
+;	exit(0);
+^	mov	ax,00H
+	push	ax
+	call	near ptr exit_
+	pop	cx
+;}
+^$20013:
+ifdef $20003
+	pop si
+endif
+ifdef	$20002
+	pop	di
+endif
+ifdef $20004
+	mov	sp,bp
+	pop	bp
+endif
+	ret
+$20004 equ	1
+$20003	equ 1
+$20002	equ 1
+_Croot_ endp
+$3:
+dataseg segment word public 'data'
+$20000	db 0,84,111,111,32,109
+	db 97,110,121,32,97,114
+	db 103,115,46,0
+dataseg ends
+;
+;#ifdef REDIR
+|
+~ size_t "L"
+~ _exit_ . "(v"
+	bss	Argv_:word,2
+~ Argv Argv_ "**c"
+	bss	Argc_:word,2
+~ Argc Argc_ "i"
+~ _ioflg_ . "[0i"
+~ _Croot_ . "(i"
+~ _sbrk_ . "(*c"
+~ _clock_ . "(i"
+~ _isatty_ . "(i"
+~ _write_ . "(i"
+~ main_ . "(i"
+~ exit_ . "(i"
+	extrn	exit_:near
+	extrn	main_:near
+	extrn	_exit_:near
+	extrn	_write_:near
+	extrn	_sbrk_:near
+	extrn	_isatty_:near
+	extrn	_clock_:near
+codeseg	ends
+dataseg segment word public 'data'
+	extrn	_ioflg_:word
+dataseg ends
+	end
--- a/v52a/LIB/86SUP/CROOT.C
+++ b/v52a/LIB/86SUP/CROOT.C
@ -0,0 +1,106 @@
+/* Copyright (C) 1981,1982, 1983 by Manx Software Systems */
+#include "errno.h"
+#include "fcntl.h"
+
+static char **Argv;
+static int Argc;
+
+extern int _ioflg[];
+
+_Croot(cp, first)
+register char *cp;
+{
+	register char **cpp;
+	char *_sbrk();
+#ifdef REDIR
+	register int k;
+	register char *fname;
+#endif
+
+	/* start the timer */
+
+	(void)_clock(0);
+
+	_ioflg[0] = _ioflg[1] = _ioflg[2] = O_TEXT;
+	_ioflg[0] |= _isatty(0) ? O_ISTTY:0;	/* set flag for i/o routines */
+	_ioflg[1] |= _isatty(1) ? O_ISTTY:0;	/* set flag for i/o routines */
+	_ioflg[2] |= _isatty(2) ? O_ISTTY:0;	/* set flag for i/o routines */
+
+	Argv = (char **)_sbrk((first+1)*sizeof(char *));
+	Argv[0] = "";
+	cpp = &Argv[Argc = first];
+	for (;;) {
+		while (*cp == ' ' || *cp == '\t')
+			++cp;
+		if (*cp == 0)
+			break;
+#ifdef REDIR
+		if (*cp == '>') {		/* redirect output */
+			k = 1;
+			goto redirect;
+		} else if (*cp == '<') {	/* redirect input */
+			k = 0;
+redirect:
+			while (*++cp == ' ' || *cp == '\t')
+				;
+			fname = cp;
+			while (*++cp)
+				if (*cp == ' ' || *cp == '\t') {
+					*cp++ = 0;
+					break;
+				}
+			_close(k);
+			if (k)
+				k = _creat(fname, 0666);
+			else
+				k = _open(fname, O_RDONLY);
+			if (k == -1)
+				_redir_err(fname);
+		} else 
+#endif
+		{
+			Argc++;
+			if (_sbrk(sizeof(char *)) == (char *)-1) {
+				_write(2, "Too many args.", 14);
+				_exit(200);
+			}
+			if (*cp=='"'){
+				++cp;
+				while (*cp == ' ' || *cp == '\t')
+					++cp;
+				if (*cp == 0)
+					break;
+				*cpp++ = cp;
+				while (*++cp)
+					if (*cp == '"'){
+						*cp++ = 0;
+						break;
+					}
+			} else {
+				*cpp++ = cp;
+				while (*++cp)
+					if (*cp == ' ' || *cp == '\t') {
+						*cp++ = 0;
+						break;
+					}
+			}
+		}
+	}
+	*cpp = 0;
+	main(Argc,Argv);
+	exit(0);
+}
+
+#ifdef REDIR
+static _redir_err(name)
+char *name;
+{
+	char buff[200];
+
+	strcpy(buff, "Can't open file for redirection: ");
+	strcat(buff, name);
+	strcat(buff, "\n");
+	_write(2, buff, strlen(buff));
+	exit(10);
+}
+#endif
--- a/v52a/LIB/86SUP/CRT0.ASM
+++ b/v52a/LIB/86SUP/CRT0.ASM
@ -0,0 +1,41 @@
+; Copyright (C) 1983-1992 by Manx Software Systems
+; :ts=8
+; Note: This module must be assembled using Microsoft's MASM 
+; or Borland's TASM assembler, not the Manx as assembler.
+PGROUP	group	@CODE,PROG
+@CODE	segment	byte public 'CODE'
+@CODE	ends
+PROG	segment	byte public 'CODE'
+PROG	ends
+
+DGROUP	group	@DATAB,@DATAI,@DATAT,@DATAU,@DATAV,@STACK
+
+@DATAB	segment	para public 'DATAB'
+@DATAB	ends
+
+@DATAI	segment	word public 'DATAI'
+	db	'Aztec C86 version 5.2a',0
+	even
+	public	__Dorg
+__Dorg	label	 byte
+@DATAI	ends
+
+@DATAT	segment	word public 'DATAT'
+	public	__Dend
+__Dend	label	 byte
+	public	__Uorg
+__Uorg	label	 byte
+@DATAT	ends
+
+@DATAU	segment	word public 'DATAU'
+@DATAU	ends
+
+@DATAV	segment	word public 'DATAV'
+	public	__Uend
+__Uend	label	 byte
+@DATAV	ends
+
+@STACK	segment	para stack 'STACK'
+First	db	2048 dup (?)
+@STACK	ends
+	end
--- a/v52a/LIB/86SUP/CSAV.ASM
+++ b/v52a/LIB/86SUP/CSAV.ASM
@ -0,0 +1,59 @@
+; Copyright (C) 1983 by Manx Software Systems
+; :ts=8
+	include lmacros.h
+dataseg segment para public 'data'
+	extrn _sbot_:word
+	extrn	_lowwater_:word
+dataseg ends
+	assume ds:dataseg,cs:codeseg
+ifdef FARPROC
+	extrn	_stkover_:far
+else
+	extrn	_stkover_:near
+endif
+	extrn	$begin:far
+	dw	near ptr $begin
+	public	$csav, $cret
+$csav	proc
+	pop	bx
+ifdef FARPROC
+	pop	dx
+endif
+	push	bp
+	mov	bp,sp
+	add	sp,ax
+	cmp	sp,bp			;check for wrap around
+	ja	stackfault
+	cmp	sp,word ptr _sbot_	;or moving into the RED zone
+	jb	stackfault
+	cmp	sp,word ptr _lowwater_
+	ja	nodeeper
+	mov	word ptr _lowwater_,sp
+nodeeper:
+	push	di
+	push	si
+ifdef	FARPROC
+	push	cs
+	mov	ax,offset $cret
+	push	ax
+	push	dx
+	push	bx
+	ret
+else
+	call	bx
+endif
+$csav	endp
+
+$cret	proc
+	pop	si
+	pop	di
+	mov	sp,bp
+	pop	bp
+	ret
+$cret	endp
+
+stackfault:
+	mov	sp,bp		;put stack back the way it was
+	jmp	_stkover_
+	finish
+	end
--- a/v52a/LIB/86SUP/CSWIT.ASM
+++ b/v52a/LIB/86SUP/CSWIT.ASM
@ -0,0 +1,29 @@
+; Copyright (C) 1983, 85 by Manx Software Systems
+; :ts=8
+	include lmacros.h
+	public $cswt
+
+$cswt	proc
+ifndef	FARPROC
+	pop	bx			; get address of table
+	push	di
+ifndef LONGPTR
+	push	es
+endif
+	mov	di,cs
+	mov	es,di
+	mov	di,bx			; make di to point to table of values
+	mov	bx,cx			; save number of entries in bx
+	shl	bx,1			; adjusted for size of an entry
+	cld
+repne	scasw				; find the right entry
+	mov	cx,es:word ptr -4[di][bx] ; pick up target address
+ifndef LONGPTR
+	pop	es
+endif
+	pop	di
+	jmp	cx			; jump there
+endif
+$cswt	endp
+	finish
+	end
--- a/v52a/LIB/86SUP/CSWT.ASM
+++ b/v52a/LIB/86SUP/CSWT.ASM
@ -0,0 +1,51 @@
+; Copyright (C) 1983, 85 by Manx Software Systems
+; :ts=8
+	include lmacros.h
+	ifdef	FARPROC
+data	equ	word ptr es:[bx]
+addr	equ	word ptr es:2[bx]
+dflt	equ	word ptr es:[bx]
+	else
+data	equ	word ptr cs:[bx]
+addr	equ	word ptr cs:2[bx]
+dflt	equ	word ptr cs:[bx]
+	endif
+slot	equ	4
+	public $swt
+
+$swt	proc
+	pop	bx
+ifdef FARPROC
+ifndef LONGPTR
+	mov	dx,es
+endif
+	pop	es
+	push	es
+endif
+	mov	cx,data
+	add	bx,2
+	jcxz	eswt
+swtloop:
+	cmp	ax,data
+	je	found
+	add	bx,slot
+	loop	swtloop
+eswt:
+	push	dflt
+ifdef FARPROC
+ifndef LONGPTR
+	mov	es,dx
+endif
+endif
+	ret
+found:
+	push	addr
+ifdef FARPROC
+ifndef LONGPTR
+	mov	es,dx
+endif
+endif
+	ret
+$swt	endp
+	finish
+	end
--- a/v52a/LIB/86SUP/DOSCLOCK.ASM
+++ b/v52a/LIB/86SUP/DOSCLOCK.ASM
@ -0,0 +1,46 @@
+; Copyright (C) 1985, 1986 by Manx Software Systems, Inc.
+; :ts=8
+	include lmacros.h
+dataseg segment word public 'data'
+	public	__lastclock_
+__lastclock_	dw	0,0
+dataseg ends
+	assume	ds:dataseg
+
+	procdef _clock,<<kind,word>>	; long _clock(kind)
+	mov	ah,2ch
+	int	21h			; get time
+	mov	al,100
+	mul	dh			;get seconds as hundredths into ax
+	sub	dh,dh
+	add	ax,dx			;add in hundredths
+	mov	bx,ax			;save total hundredths
+	mov	al,60
+	mul	ch			; get hours as mins into ax
+	sub	ch,ch
+	add	ax,cx			; add minutes to converted hours
+	mov	cx,6000
+	mul	cx			; convert to hundredths of seconds
+	add	ax,bx			; add in seconds+hundredths
+	adc	dx,0			; axdx now contains value in hunredths
+	cmp	dx,word ptr __lastclock_+2
+	ja	valok
+	jne	clktrn
+	cmp	ax,word ptr __lastclock_
+	jae	valok
+clktrn:					; clock turned over since last call
+	add	ax,0d600h
+	adc	dx,083h			; add in 24 hours
+valok:
+	mov	cx,kind
+	jne	doret
+	mov word ptr __lastclock_+2,dx
+	mov word ptr __lastclock_,ax
+	pret
+doret:
+	sub	ax,__lastclock_
+	sbb	dx,__lastclock_+2
+	pret
+	pend _clock
+	finish
+	end
--- a/v52a/LIB/86SUP/FARCALL.ASM
+++ b/v52a/LIB/86SUP/FARCALL.ASM
@ -0,0 +1,45 @@
+; :ts=8
+;Copyright (C) 1983, 85 by Manx Software Systems
+	include	lmacros.h
+	procdef farcall, <<where,dword>, <srcregs,ptr>, <dstregs,ptr>>
+	push	si
+	push	di
+	push	ds
+	push	es
+;
+	ldptr	bx,srcregs,ds
+	mov	ax,[bx]
+	push	2[bx]		;save BX value for later
+	mov	cx,4[bx]
+	mov	dx,6[bx]
+	mov	si,8[bx]
+	mov	di,10[bx]
+	mov	es,14[bx]
+	mov	ds,12[bx]	;trash DS last
+	pop	bx		;now get value for BX
+	push	bp
+	call	where
+	pop	bp
+	push	ds		;save returned DS
+	push	bx		;save returned BX
+	mov	ds,-6[bp]	;fetch C's data seg, for small model
+	ldptr	bx,dstregs,ds
+	mov	[bx],ax
+	pop	2[bx]		;value returned in BX
+	mov	4[bx],cx
+	mov	6[bx],dx
+	mov	8[bx],si
+	mov	10[bx],di
+	pop	12[bx]		;value returned in DS
+	mov	14[bx],es
+	pop	es
+	pop	ds
+	pop	di
+	pop	si
+	pop	bp
+	pushf
+	pop	ax
+	ret
+	pend	farcall
+	finish
+	end
--- a/v52a/LIB/86SUP/FCALL.ASM
+++ b/v52a/LIB/86SUP/FCALL.ASM
@ -0,0 +1,13 @@
+; Copyright (C) 1985 by Manx Software Systems
+; :ts=8
+	largecode
+codeseg	segment byte public 'code'
+	assume cs:codeseg
+	public	$fcall
+$fcall	proc	far
+	push	dx
+	push	ax
+	ret
+$fcall	endp
+codeseg	ends
+	end
--- a/Show More
+++ b/Show More