258 lines
5.4 KiB
C++
258 lines
5.4 KiB
C++
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/**
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*
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* This header file supplies information needed to interface with the
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* particular operating system and C compiler being used.
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*
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**/
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/**
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*
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* The following symbols define which processor is being used.
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*
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* I8080 Intel 8080
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* I8085 Intel 8085
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* Z80 Zilog Z80
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* I8086 Intel 8086 or 8088
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* M68000 Motorola 68000
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* GA16 General Automation 16-bit mini
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* IBMPC IBM Personal Computer (also sets I8086)
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*/
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#define IBMPC 1
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#ifdef IBMPC
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#define I8086 1
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#endif
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#ifdef I8086
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#include "m8086.h"
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#endif
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/**
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*
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* The following symbols specify which operating system is being used.
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*
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* CPM Any CP/M OS
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* CPM80 CP/M for Intel 8080 or Zilog Z80
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* CPM86 CP/M for Intel 8086
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* CPM68 CP/M for Motorola 68000
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* MSDOS Microsoft's MSDOS
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* MSDOS1 MSDOS Version 1 (also sets MSDOS)
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* MSDOS2 MSDOS Version 2 (also sets MSDOS)
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*
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* Note: CPM will be set to 1 for any of the above.
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*
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* UNIX "Standard" UNIX
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* QUNIX Quantum's QUNIX OS
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* MIBS General Automation's MIBS OS
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* OASIS OASIS OS
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* PICK PICK OS
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*
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*/
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#define MSDOS 1
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#ifdef MSDOS
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#include "msdos.h"
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#endif
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#ifdef CPM80
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#define CPM 1
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#endif
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#ifdef CPM86
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#define CPM 1
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#endif
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#ifdef CPM68
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#define CPM 1
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#endif
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#ifdef MSDOS
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#define CPM 1
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#endif
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/**
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*
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* The following definitions specify the particular C compiler being used.
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*
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* LATTICE Lattice C compiler
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* BDS BDS C compiler
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* BTL Bell Labs C compiler or equivalent
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* MANX MANX Aztec C compiler
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*
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*/
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#define LATTICE 1
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/**
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*
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* The following type definitions take care of the particularly nasty
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* machine dependency caused by the unspecified handling of sign extension
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* in the C language. When converting "char" to "int" some compilers
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* will extend the sign, while others will not. Both are correct, and
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* the unsuspecting programmer is the loser. For situations where it
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* matters, the new type "byte" is equivalent to "unsigned char".
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*
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*/
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#ifdef LATTICE
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typedef char byte;
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#endif
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#ifdef BDS
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#define byte char
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#endif
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#ifdef BTL
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typedef unsigned char byte;
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#endif
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#ifdef MANX
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#define byte char
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#endif
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/**
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*
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* Miscellaneous definitions
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*
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*/
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#define SECSIZ 128 /* disk sector size */
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#ifdef CPM
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#define DMA (char *)0x80 /* disk buffer address */
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#endif
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/**
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*
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* The following structure is a File Control Block. Operating systems
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* with CPM-like characteristics use the FCB to store information about
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* a file while it is open.
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*
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*/
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struct FCB
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{
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char fcbdrv; /* drive code */
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char fcbnam[8]; /* file name */
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char fcbext[3]; /* file name extension */
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#ifdef MSDOS
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short fcbcb; /* current block number */
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short fcblrs; /* logical record size */
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long fcblfs; /* logical file size */
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short fcbdat; /* create/change date */
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char fcbsys[10]; /* reserved */
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char fcbcr; /* current record number */
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long fcbrec; /* random record number */
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#else
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char fcbexn; /* extent number */
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char fcbs1; /* reserved */
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char fcbs2; /* reserved */
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char fcbrc; /* record count */
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char fcbsys[16]; /* reserved */
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char fcbcr; /* current record number */
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short fcbrec; /* random record number */
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char fcbovf; /* random record overflow */
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#endif
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};
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#define FCBSIZ sizeof(struct FCB)
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/**
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*
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* The following symbols define the sizes of file names and node names.
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*
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*/
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#ifdef CPM
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#define FNSIZE 16 /* maximum file node name size */
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#define FMSIZE 16 /* maximum file name size */
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#endif
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#ifdef MSDOS2
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#define FNSIZE 16
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#define FMSIZE 64
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#endif
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#ifdef UNIX
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#define FNSIZE 16
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#define FMSIZE 64
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#endif
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/**
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*
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* The following structures define the 8086 registers that are passed to
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* various low-level operating system service functions.
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*
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*/
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#ifdef I8086
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struct XREG
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{
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short ax,bx,cx,dx,si,di;
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};
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struct HREG
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{
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byte al,ah,bl,bh,cl,ch,dl,dh;
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};
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union REGS
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{
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struct XREG x;
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struct HREG h;
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};
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struct SREGS
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{
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short es,cs,ss,ds;
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};
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#endif
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/**
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*
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* The following symbols define the code numbers for the various service
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* functions.
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*
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*/
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#ifdef MSDOS
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#define SVC_DATE 0x2a /* get date */
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#define SVC_TIME 0x2c /* get time */
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#endif
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/**
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*
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* The following codes are used to open files in various modes.
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*
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*/
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#ifdef LATTICE
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#define OPENR 0x8000 /* open for reading */
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#define OPENW 0x8001 /* open for writing */
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#define OPENU 0x8002 /* open for read/write */
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#define OPENC 0x8001 /* create and open for writing */
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#else
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#define OPENR 0
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#define OPENW 1
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#define OPENU 2
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#endif
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/**
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*
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* The following codes are returned by the low-level operating system service
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* calls. They are usually placed into _oserr by the OS interface functions.
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*
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*/
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#if MSDOS2
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#define E_FUNC 1 /* invalid function code */
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#define E_FNF 2 /* file not found */
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#define E_PNF 3 /* path not found */
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#define E_NMH 4 /* no more file handles */
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#define E_ACC 5 /* access denied */
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#define E_IFH 6 /* invalid file handle */
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#define E_MCB 7 /* memory control block problem */
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#define E_MEM 8 /* insufficient memory */
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#define E_MBA 9 /* invalid memory block address */
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#define E_ENV 10 /* invalid environment */
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#define E_FMT 11 /* invalid format */
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#define E_IAC 12 /* invalid access code */
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#define E_DATA 13 /* invalid data */
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#define E_DRV 15 /* invalid drive code */
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#define E_RMV 16 /* remove denied */
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#define E_DEV 17 /* invalid device */
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#define E_NMF 18 /* no more files */
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#endif
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