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FreeDOS/sys/sys.c
Bart Oldeman 9502a97d91 FAT32 detection fixes 
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@347 6ac86273-5f31-0410-b378-82cca8765d1b
2002-02-07 22:30:58 +00:00

899 lines
22 KiB
C
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/***************************************************************
sys.c
DOS-C
sys utility for DOS-C
Copyright (c) 1991
Pasquale J. Villani
All Rights Reserved
This file is part of DOS-C.
DOS-C is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 2, or (at your option) any later version.
DOS-C is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
DOS-C; see the file COPYING. If not, write to the Free Software Foundation,
675 Mass Ave, Cambridge, MA 02139, USA.
***************************************************************/
/*
TE thinks, that the boot info storage should be done by FORMAT, noone else
unfortunately, that doesn't work ???
*/
#define STORE_BOOT_INFO
#define DEBUG
/* #define DDEBUG */
#define SYS_VERSION "v2.4"
#include <stdlib.h>
#include <dos.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/stat.h>
#ifdef __TURBOC__
#include <mem.h>
#else
#include <memory.h>
#endif
#include <string.h>
#ifdef __TURBOC__
#include <dir.h>
#endif
#define SYS_MAXPATH 260
#include "portab.h"
extern WORD CDECL printf(CONST BYTE * fmt, ...);
extern WORD CDECL sprintf(BYTE * buff, CONST BYTE * fmt, ...);
#include "b_fat12.h"
#include "b_fat16.h"
#ifdef WITHFAT32
#include "b_fat32.h"
#endif
#ifndef __WATCOMC__
#include <io.h>
#else
/* some non-conforming functions to make the executable smaller */
int open(const char *pathname, int flags, ...)
{
int handle;
int result = (flags & O_CREAT ?
_dos_creat(pathname, _A_NORMAL, &handle) :
_dos_open(pathname, flags & (O_RDONLY | O_WRONLY | O_RDWR),
&handle));
return (result == 0 ? handle : -1);
}
int read(int fd, void *buf, unsigned count)
{
unsigned bytes;
int result = _dos_read(fd, buf, count, &bytes);
return (result == 0 ? bytes : -1);
}
int write(int fd, const void *buf, unsigned count)
{
unsigned bytes;
int result = _dos_write(fd, buf, count, &bytes);
return (result == 0 ? bytes : -1);
}
#define close _dos_close
int stat(const char *file_name, struct stat *buf)
{
struct find_t find_tbuf;
UNREFERENCED_PARAMETER(buf);
return _dos_findfirst(file_name, _A_NORMAL | _A_HIDDEN | _A_SYSTEM, &find_tbuf);
}
#endif
BYTE pgm[] = "SYS";
void put_boot(COUNT, BYTE *, BOOL);
BOOL check_space(COUNT, BYTE *);
BOOL copy(COUNT drive, BYTE * srcPath, BYTE * rootPath, BYTE * file);
COUNT DiskRead(WORD, WORD, WORD, WORD, WORD, BYTE FAR *);
COUNT DiskWrite(WORD, WORD, WORD, WORD, WORD, BYTE FAR *);
#define SEC_SIZE 512
#define COPY_SIZE 0x7e00
#ifdef _MSC_VER
#pragma pack(1)
#endif
struct bootsectortype {
UBYTE bsJump[3];
char OemName[8];
UWORD bsBytesPerSec;
UBYTE bsSecPerClust;
UWORD bsResSectors;
UBYTE bsFATs;
UWORD bsRootDirEnts;
UWORD bsSectors;
UBYTE bsMedia;
UWORD bsFATsecs;
UWORD bsSecPerTrack;
UWORD bsHeads;
ULONG bsHiddenSecs;
ULONG bsHugeSectors;
UBYTE bsDriveNumber;
UBYTE bsReserved1;
UBYTE bsBootSignature;
ULONG bsVolumeID;
char bsVolumeLabel[11];
char bsFileSysType[8];
char unused[2];
UWORD sysRootDirSecs; /* of sectors root dir uses */
ULONG sysFatStart; /* first FAT sector */
ULONG sysRootDirStart; /* first root directory sector */
ULONG sysDataStart; /* first data sector */
};
struct bootsectortype32 {
UBYTE bsJump[3];
char OemName[8];
UWORD bsBytesPerSec;
UBYTE bsSecPerClust;
UWORD bsResSectors;
UBYTE bsFATs;
UWORD bsRootDirEnts;
UWORD bsSectors;
UBYTE bsMedia;
UWORD bsFATsecs;
UWORD bsSecPerTrack;
UWORD bsHeads;
ULONG bsHiddenSecs;
ULONG bsHugeSectors;
ULONG bsBigFatSize;
UBYTE bsFlags;
UBYTE bsMajorVersion;
UWORD bsMinorVersion;
ULONG bsRootCluster;
UWORD bsFSInfoSector;
UWORD bsBackupBoot;
ULONG bsReserved2[3];
UBYTE bsDriveNumber;
UBYTE bsReserved3;
UBYTE bsExtendedSignature;
ULONG bsSerialNumber;
char bsVolumeLabel[11];
char bsFileSystemID[8];
ULONG sysFatStart;
ULONG sysDataStart;
UWORD sysFatSecMask;
UWORD sysFatSecShift;
};
UBYTE newboot[SEC_SIZE], oldboot[SEC_SIZE];
#define SBOFFSET 11
#define SBSIZE (sizeof(struct bootsectortype) - SBOFFSET)
#define SBSIZE32 (sizeof(struct bootsectortype32) - SBOFFSET)
/* essentially - verify alignment on byte boundaries at compile time */
struct VerifyBootSectorSize {
char failure1[sizeof(struct bootsectortype) == 78 ? 1 : -1];
char failure2[sizeof(struct bootsectortype) == 78 ? 1 : 0];
};
int FDKrnConfigMain(int argc, char **argv);
int main(int argc, char **argv)
{
COUNT drive; /* destination drive */
COUNT drivearg = 0; /* drive argument position */
BYTE *bsFile = NULL; /* user specified destination boot sector */
unsigned srcDrive; /* source drive */
BYTE srcPath[SYS_MAXPATH]; /* user specified source drive and/or path */
BYTE rootPath[4]; /* alternate source path to try if not '\0' */
WORD slen;
printf("FreeDOS System Installer " SYS_VERSION "\n\n");
if (argc > 1 && memicmp(argv[1], "CONFIG", 6) == 0)
{
exit(FDKrnConfigMain(argc, argv));
}
srcPath[0] = '\0';
if (argc > 1 && argv[1][1] == ':' && argv[1][2] == '\0')
drivearg = 1;
if (argc > 2 && argv[2][1] == ':' && argv[2][2] == '\0')
{
drivearg = 2;
strncpy(srcPath, argv[1], SYS_MAXPATH - 12);
/* leave room for COMMAND.COM\0 */
srcPath[SYS_MAXPATH - 13] = '\0';
/* make sure srcPath + "file" is a valid path */
slen = strlen(srcPath);
if ((srcPath[slen - 1] != ':') &&
((srcPath[slen - 1] != '\\') || (srcPath[slen - 1] != '/')))
{
srcPath[slen] = '\\';
slen++;
srcPath[slen] = '\0';
}
}
if (drivearg == 0)
{
printf("Usage: %s [source] drive: [bootsect [BOTH]]\n", pgm);
printf
(" source = A:,B:,C:\\KERNEL\\BIN\\,etc., or current directory if not given\n");
printf(" drive = A,B,etc.\n");
printf
(" bootsect = name of 512-byte boot sector file image for drive:\n");
printf(" to write to instead of real boot sector\n");
printf
(" BOTH : write to both the real boot sector and the image file\n");
printf("%s CONFIG /help\n", pgm);
exit(1);
}
drive = toupper(argv[drivearg][0]) - 'A';
if (drive < 0 || drive >= 26)
{
printf("%s: drive %c must be A:..Z:\n", pgm,
*argv[(argc == 3 ? 2 : 1)]);
exit(1);
}
/* Get source drive */
if ((strlen(srcPath) > 1) && (srcPath[1] == ':')) /* src specifies drive */
srcDrive = toupper(*srcPath) - 'A';
else /* src doesn't specify drive, so assume current drive */
{
#ifdef __TURBOC__
srcDrive = (unsigned) getdisk();
#else
_dos_getdrive(&srcDrive);
#endif
}
/* Don't try root if src==dst drive or source path given */
if ((drive == srcDrive)
|| (*srcPath
&& ((srcPath[1] != ':') || ((srcPath[1] == ':') && srcPath[2]))))
*rootPath = '\0';
else
sprintf(rootPath, "%c:\\", 'A' + srcDrive);
if (!check_space(drive, oldboot))
{
printf("%s: Not enough space to transfer system files\n", pgm);
exit(1);
}
printf("\nCopying KERNEL.SYS...\n");
if (!copy(drive, srcPath, rootPath, "kernel.sys"))
{
printf("\n%s: cannot copy \"KERNEL.SYS\"\n", pgm);
exit(1);
}
printf("\nCopying COMMAND.COM...\n");
if (!copy(drive, srcPath, rootPath, "command.com"))
{
printf("\n%s: cannot copy \"COMMAND.COM\"\n", pgm);
exit(1);
}
if (argc > drivearg + 1)
bsFile = argv[drivearg + 1];
printf("\nWriting boot sector...\n");
put_boot(drive, bsFile,
(argc > drivearg + 2)
&& memicmp(argv[drivearg + 2], "BOTH", 4) == 0);
printf("\nSystem transferred.\n");
return 0;
}
#ifdef DDEBUG
VOID dump_sector(unsigned char far * sec)
{
COUNT x, y;
char c;
for (x = 0; x < 32; x++)
{
printf("%03X ", x * 16);
for (y = 0; y < 16; y++)
{
printf("%02X ", sec[x * 16 + y]);
}
for (y = 0; y < 16; y++)
{
c = oldboot[x * 16 + y];
if (isprint(c))
printf("%c", c);
else
printf(".");
}
printf("\n");
}
printf("\n");
}
#endif
/*
TC absRead not functional on MSDOS 6.2, large disks
MSDOS requires int25, CX=ffff for drives > 32MB
*/
#ifdef __WATCOMC__
unsigned int2526readwrite(int DosDrive, void *diskReadPacket, unsigned intno);
#pragma aux int2526readwrite = \
"mov cx, 0xffff" \
"cmp si, 0x26" \
"je int26" \
"int 0x25" \
"jmp short cfltest" \
"int26:" \
"int 0x26" \
"cfltest:" \
"mov ax, 0" \
"adc ax, ax" \
parm [ax] [bx] [si] \
modify [cx] \
value [ax];
fat32readwrite(int DosDrive, void *diskReadPacket, unsigned intno);
#pragma aux fat32readwrite = \
"mov ax, 0x7305" \
"mov cx, 0xffff" \
"inc dx" \
"sub si, 0x25" \
"int 0x21" \
"mov ax, 0" \
"adc ax, ax" \
parm [dx] [bx] [si] \
modify [cx dx si] \
value [ax];
#else
int2526readwrite(int DosDrive, void *diskReadPacket, unsigned intno)
{
union REGS regs;
regs.h.al = (BYTE) DosDrive;
regs.x.bx = (short)&diskReadPacket;
regs.x.cx = 0xffff;
int86(intno, &regs, &regs);
return regs.x.cflag;
}
fat32readwrite(int DosDrive, void *diskReadPacket, unsigned intno)
{
union REGS regs;
regs.x.ax = 0x7305;
regs.h.dl = DosDrive + 1;
regs.x.bx = (short)&diskReadPacket;
regs.x.cx = 0xffff;
regs.x.si = intno - 0x25;
int86(0x21, &regs, &regs);
return regs.x.cflag;
}
#endif
int MyAbsReadWrite(int DosDrive, int count, ULONG sector, void *buffer,
unsigned intno)
{
struct {
unsigned long sectorNumber;
unsigned short count;
void far *address;
} diskReadPacket;
diskReadPacket.sectorNumber = sector;
diskReadPacket.count = count;
diskReadPacket.address = buffer;
if (intno != 0x25 && intno != 0x26)
return 0xff;
if (int2526readwrite(DosDrive, &diskReadPacket, intno))
{
#ifdef WITHFAT32
return fat32readwrite(DosDrive, &diskReadPacket, intno);
#else
return 0xff;
#endif
}
return 0;
}
#ifdef __WATCOMC__
unsigned getdrivespace(COUNT drive, unsigned *total_clusters);
#pragma aux getdrivespace = \
"mov ah, 0x36" \
"inc dx" \
"int 0x21" \
"mov [si], dx" \
parm [dx] [si] \
modify [bx cx dx] \
value [ax];
unsigned getextdrivespace(void *drivename, void *buf, unsigned buf_size);
#pragma aux getextdrivespace = \
"mov ax, 0x7303" \
"push ds" \
"pop es" \
"stc" \
"int 0x21" \
"mov ax, 0" \
"adc ax, ax" \
parm [dx] [di] [cx] \
modify [es] \
value [ax];
#else
unsigned getdrivespace(COUNT drive, unsigned *total_clusters)
{
union REGS regs;
regs.h.ah = 0x36; /* get drive free space */
regs.h.dl = drive + 1; /* 1 = 'A',... */
int86(0x21, &regs, &regs);
*total_clusters = regs.x.dx;
return regs.x.ax;
}
unsigned getextdrivespace(void *drivename, void *buf, unsigned buf_size)
{
union REGS regs;
struct SREGS sregs;
regs.x.ax = 0x7303; /* get extended drive free space */
sregs.es = FP_SEG(buf);
regs.x.di = FP_OFF(buf);
sregs.ds = FP_SEG(drivename);
regs.x.dx = FP_OFF(drivename);
regs.x.cx = buf_size;
int86x(0x21, &regs, &regs, &sregs);
return regs.x.ax == 0x7300 || regs.x.cflag;
}
#endif
VOID put_boot(COUNT drive, BYTE * bsFile, BOOL both)
{
ULONG temp;
struct bootsectortype *bs;
#ifdef WITHFAT32
struct bootsectortype32 *bs32;
#endif
int fs;
char drivename[] = "A:\\";
static unsigned char x[0x40]; /* we make this static to be 0 by default -
this avoids FAT misdetections */
unsigned total_clusters;
#ifdef DEBUG
printf("Reading old bootsector from drive %c:\n", drive + 'A');
#endif
if (MyAbsReadWrite(drive, 1, 0, oldboot, 0x25) != 0)
{
printf("can't read old boot sector for drive %c:\n", drive + 'A');
exit(1);
}
#ifdef DDEBUG
printf("Old Boot Sector:\n");
dump_sector(oldboot);
#endif
bs = (struct bootsectortype *)&oldboot;
if ((bs->bsFileSysType[4] == '6') && (bs->bsBootSignature == 0x29))
{
fs = 16;
}
else
{
fs = 12;
}
/*
the above code is not save enough for me (TE), so we change the
FS detection method to GetFreeDiskSpace().
this should work, as the disk was writeable, so GetFreeDiskSpace should work.
*/
if (getdrivespace(drive, &total_clusters) == 0xffff)
{
printf("can't get free disk space for %c:\n", drive + 'A');
exit(1);
}
if (total_clusters <= 0xff6)
{
if (fs != 12)
printf("warning : new detection overrides old detection\a\n");
fs = 12;
}
else
{
if (fs != 16)
printf("warning : new detection overrides old detection\a\n");
fs = 16;
/* fs = 16/32.
we don't want to crash a FAT32 drive
*/
drivename[0] = 'A' + drive;
if (getextdrivespace(drivename, x, sizeof(x)))
/* error --> no Win98 --> no FAT32 */
{
printf("get extended drive space not supported --> no FAT32\n");
}
else
{
if (*(unsigned long *)(x + 0x10) /* total number of clusters */
> (unsigned)65526l)
{
fs = 32;
}
}
}
if (fs == 16)
{
memcpy(newboot, b_fat16, SEC_SIZE); /* copy FAT16 boot sector */
printf("FAT type: FAT16\n");
}
else if (fs == 12)
{
memcpy(newboot, b_fat12, SEC_SIZE); /* copy FAT12 boot sector */
printf("FAT type: FAT12\n");
}
else
{
printf("FAT type: FAT32\n");
#ifdef WITHFAT32
memcpy(newboot, b_fat32, SEC_SIZE); /* copy FAT32 boot sector */
#else
printf("SYS hasn't been compiled with FAT32 support.");
printf("Consider using -DWITHFAT32 option.\n");
exit(1);
#endif
}
/* Copy disk parameter from old sector to new sector */
#ifdef WITHFAT32
if (fs == 32)
memcpy(&newboot[SBOFFSET], &oldboot[SBOFFSET], SBSIZE32);
else
#endif
memcpy(&newboot[SBOFFSET], &oldboot[SBOFFSET], SBSIZE);
bs = (struct bootsectortype *)&newboot;
memcpy(bs->OemName, "FreeDOS ", 8);
#ifdef WITHFAT32
if (fs == 32)
{
bs32 = (struct bootsectortype32 *)&newboot;
temp = bs32->bsHiddenSecs + bs32->bsResSectors;
bs32->sysFatStart = temp;
bs32->sysDataStart = temp + bs32->bsBigFatSize * bs32->bsFATs;
bs32->sysFatSecMask = bs32->bsBytesPerSec / 4 - 1;
temp = bs32->sysFatSecMask + 1;
for (bs32->sysFatSecShift = 0; temp != 1;
bs32->sysFatSecShift++, temp >>= 1) ;
}
#ifdef DEBUG
if (fs == 32)
{
printf("FAT starts at sector %lx = (%lx + %x)\n", bs32->sysFatStart,
bs32->bsHiddenSecs, bs32->bsResSectors);
printf("DATA starts at sector %lx\n", bs32->sysDataStart);
}
#endif
else
#endif
{
#ifdef STORE_BOOT_INFO
/* TE thinks : never, see above */
/* temporary HACK for the load segment (0x0060): it is in unused */
/* only needed for older kernels */
*((UWORD *) (bs->unused)) =
*((UWORD *) (((struct bootsectortype *)&b_fat16)->unused));
/* end of HACK */
/* root directory sectors */
bs->sysRootDirSecs = bs->bsRootDirEnts / 16;
/* sector FAT starts on */
temp = bs->bsHiddenSecs + bs->bsResSectors;
bs->sysFatStart = temp;
/* sector root directory starts on */
temp = temp + bs->bsFATsecs * bs->bsFATs;
bs->sysRootDirStart = temp;
/* sector data starts on */
temp = temp + bs->sysRootDirSecs;
bs->sysDataStart = temp;
}
#ifdef DEBUG
printf("Root dir entries = %u\n", bs->bsRootDirEnts);
printf("Root dir sectors = %u\n", bs->sysRootDirSecs);
printf("FAT starts at sector %lu = (%lu + %u)\n", bs->sysFatStart,
bs->bsHiddenSecs, bs->bsResSectors);
printf("Root directory starts at sector %lu = (PREVIOUS + %u * %u)\n",
bs->sysRootDirStart, bs->bsFATsecs, bs->bsFATs);
printf("DATA starts at sector %lu = (PREVIOUS + %u)\n", bs->sysDataStart,
bs->sysRootDirSecs);
#endif
#endif
#ifdef DDEBUG
printf("\nNew Boot Sector:\n");
dump_sector(newboot);
#endif
if ((bsFile == NULL) || both)
{
#ifdef DEBUG
printf("writing new bootsector to drive %c:\n", drive + 'A');
#endif
if (MyAbsReadWrite(drive, 1, 0, newboot, 0x26) != 0)
{
printf("Can't write new boot sector to drive %c:\n", drive + 'A');
exit(1);
}
}
if (bsFile != NULL)
{
int fd;
#ifdef DEBUG
printf("writing new bootsector to file %s\n", bsFile);
#endif
/* write newboot to bsFile */
if ((fd =
open(bsFile, O_RDWR | O_TRUNC | O_CREAT | O_BINARY,
S_IREAD | S_IWRITE)) < 0)
{
printf(" %s: can't create\"%s\"\nDOS errnum %d", pgm, bsFile, errno);
exit(1);
}
if (write(fd, newboot, SEC_SIZE) != SEC_SIZE)
{
printf("Can't write %u bytes to %s\n", SEC_SIZE, bsFile);
close(fd);
unlink(bsFile);
exit(1);
}
close(fd);
}
}
BOOL check_space(COUNT drive, BYTE * BlkBuffer)
{
/* this should check, if on destination is enough space
to hold command.com+ kernel.sys */
UNREFERENCED_PARAMETER(drive);
UNREFERENCED_PARAMETER(BlkBuffer);
return TRUE;
}
BYTE copybuffer[COPY_SIZE];
BOOL copy(COUNT drive, BYTE * srcPath, BYTE * rootPath, BYTE * file)
{
BYTE dest[SYS_MAXPATH], source[SYS_MAXPATH];
unsigned ret;
int fdin, fdout;
ULONG copied = 0;
struct stat fstatbuf;
sprintf(dest, "%c:\\%s", 'A' + drive, file);
sprintf(source, "%s%s", srcPath, file);
if (stat(source, &fstatbuf))
{
printf("%s: \"%s\" not found\n", pgm, source);
if ((rootPath != NULL) && (*rootPath) /* && (errno == ENOENT) */ )
{
sprintf(source, "%s%s", rootPath, file);
printf("%s: Trying \"%s\"\n", pgm, source);
if (stat(source, &fstatbuf))
{
printf("%s: \"%s\" not found\n", pgm, source);
return FALSE;
}
}
else
return FALSE;
}
if ((fdin = open(source, O_RDONLY | O_BINARY)) < 0)
{
printf("%s: failed to open \"%s\"\n", pgm, source);
return FALSE;
}
if ((fdout =
open(dest, O_RDWR | O_TRUNC | O_CREAT | O_BINARY,
S_IREAD | S_IWRITE)) < 0)
{
printf(" %s: can't create\"%s\"\nDOS errnum %d", pgm, dest, errno);
close(fdin);
return FALSE;
}
while ((ret = read(fdin, copybuffer, COPY_SIZE)) > 0)
{
if (write(fdout, copybuffer, ret) != ret)
{
printf("Can't write %u bytes to %s\n", ret, dest);
close(fdout);
unlink(dest);
break;
}
copied += ret;
}
#ifdef __TURBOC__
{
struct ftime ftime;
getftime(fdin, &ftime);
setftime(fdout, &ftime);
}
#endif
#ifdef __WATCOMC__
{
unsigned short date, time;
_dos_getftime(fdin, &date, &time);
_dos_setftime(fdout, date, time);
}
#endif
close(fdin);
close(fdout);
#ifdef _MSV_VER
{
#include <utime.h>
struct utimbuf utimb;
utimb.actime = /* access time */
utimb.modtime = fstatbuf.st_mtime; /* modification time */
utime(dest, &utimb);
};
#endif
printf("%lu Bytes transferred", copied);
return TRUE;
}
/* Log: sys.c,v see "cvs log sys.c" for newer entries.
/* version 2.2 jeremyd 2001/9/20
Changed so if no source given or only source drive (no path)
given, then checks for kernel.sys & command.com in current
path (of current drive or given drive) and if not there
uses root (but only if source & destination drive are different).
Fix printf to include count(ret) if copy can't write all requested bytes
*/
/* version 2.1a jeremyd 2001/8/19
modified so takes optional 2nd parameter (similar to PC DOS)
where if only 1 argument is given, assume to be destination drive,
but if two arguments given, 1st is source (drive and/or path)
and second is destination drive
*/
/* Revision 2.1 tomehlert 2001/4/26
changed the file system detection code.
*/
/* Revision 2.0 tomehlert 2001/4/26
no direct access to the disk any more, this is FORMAT's job
no floppy.asm anymore, no segmentation problems.
no access to partition tables
instead copy boot sector using int25/int26 = absdiskread()/write
if xxDOS is able to handle the disk, SYS should work
additionally some space savers:
replaced fopen() by open()
included (slighly modified) PRF.c from kernel
size is no ~7500 byte vs. ~13690 before
* Revision 1.10 2000/03/31 06:59:10 jprice
* Added discription of program.
*
* Revision 1.9 1999/09/20 18:34:40 jprice
* *** empty log message ***
*
* Revision 1.8 1999/09/20 18:27:19 jprice
* Changed open/creat to fopen to make TC2 happy.
*
* Revision 1.7 1999/09/15 05:39:02 jprice
* Changed boot sector writing code so easier to read.
*
* Revision 1.6 1999/09/14 17:30:44 jprice
* Added debug log creation to sys.com.
*
* Revision 1.5 1999/08/25 03:19:51 jprice
* ror4 patches to allow TC 2.01 compile.
*
* Revision 1.4 1999/04/17 19:14:44 jprice
* Fixed multi-sector code
*
* Revision 1.3 1999/04/01 07:24:05 jprice
* SYS modified for new boot loader
*
* Revision 1.2 1999/03/29 16:24:48 jprice
* Fixed error message
*
* Revision 1.1.1.1 1999/03/29 15:43:15 jprice
* New version without IPL.SYS
* Revision 1.3 1999/01/21 04:35:21 jprice Fixed comments.
* Added indent program
*
* Revision 1.2 1999/01/21 04:13:52 jprice Added messages to sys. Also made
* it create a .COM file.
*
*/
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