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31591f162c
FreeDOS/kernel/config.c
Bart Oldeman c6aa00cce5 Remove unnecessary buffer fields and clean-up prototypes. 
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@403 6ac86273-5f31-0410-b378-82cca8765d1b
2002-08-03 02:13:51 +00:00

1778 lines
42 KiB
C
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/****************************************************************/
/* */
/* config.c */
/* DOS-C */
/* */
/* config.sys Processing Functions */
/* */
/* Copyright (c) 1996 */
/* 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. */
/****************************************************************/
#include "portab.h"
#include "init-mod.h"
#include "init-dat.h"
#include "dyndata.h"
#ifdef VERSION_STRINGS
static BYTE *RcsId =
"$Id$";
#endif
#ifdef DEBUG
#define DebugPrintf(x) printf x
#else
#define DebugPrintf(x)
#endif
#ifdef KDB
#include <alloc.h>
#define KernelAlloc(x) adjust_far((void far *)malloc((unsigned long)(x)))
#endif
/*
These are the far variables from the DOS data segment that we need here. The
init procedure uses a different default DS data segment, which is discarded
after use. I hope to clean this up to use the DOS List of List and Swappable
Data Area obtained via INT21.
-- Bart
*/
extern f_node_ptr DOSFAR f_nodes; /* pointer to the array */
extern UWORD DOSFAR f_nodes_cnt, /* number of allocated f_nodes */
DOSFAR ASM first_mcb; /* Start of user memory */
extern UBYTE DOSFAR ASM lastdrive, DOSFAR ASM nblkdev, DOSFAR ASM mem_access_mode,
DOSFAR ASM uppermem_link;
extern struct dhdr
DOSTEXTFAR ASM blk_dev, /* Block device (Disk) driver */
DOSFAR ASM nul_dev;
extern struct buffer FAR *DOSFAR ASM firstbuf; /* head of buffers linked list */
extern struct dpb FAR *DOSFAR ASM DPBp;
/* First drive Parameter Block */
extern struct cds FAR *DOSFAR ASM CDSp;
/* Current Directory Structure */
extern sfttbl FAR *DOSFAR ASM sfthead;
/* System File Table head */
extern sfttbl FAR *DOSFAR ASM FCBp;
extern BYTE DOSFAR ASM VgaSet, DOSFAR _HMATextAvailable, /* first byte of available CODE area */
FAR _HMATextStart[], /* first byte of HMAable CODE area */
FAR _HMATextEnd[], DOSFAR ASM break_ena, /* break enabled flag */
DOSFAR os_major, /* major version number */
DOSFAR os_minor, /* minor version number */
DOSFAR ASM switchar, DOSFAR _InitTextStart, /* first available byte of ram */
DOSFAR ReturnAnyDosVersionExpected;
extern UWORD DOSFAR ASM uppermem_root, DOSFAR ASM LoL_nbuffers;
UWORD umb_start = 0, UMB_top = 0;
UWORD ram_top = 0; /* How much ram in Kbytes */
struct config Config = {
NUMBUFF,
NFILES,
NFCBS,
0,
"command.com",
" /P /E:256\r\n",
NLAST,
NSTACKS,
128
/* COUNTRY= is initialized within DoConfig() */
, 0 /* country ID */
, 0 /* codepage */
, "" /* filename */
, 0 /* amount required memory */
, 0 /* pointer to loaded data */
, 0 /* strategy for command.com is low by default */
};
/* MSC places uninitialized data into COMDEF records,
that end up in DATA segment. this can't be tolerated
in INIT code.
please make sure, that ALL data in INIT is initialized !!
*/
BYTE FAR *lpBase = 0;
BYTE FAR *upBase = 0;
BYTE FAR *lpTop = 0;
BYTE FAR *lpOldTop = 0;
STATIC unsigned nCfgLine = 0;
STATIC COUNT nPass = 0;
COUNT UmbState = 0;
STATIC BYTE szLine[256] = { 0 };
STATIC BYTE szBuf[256] = { 0 };
BYTE singleStep = FALSE; /* F8 processing */
BYTE SkipAllConfig = FALSE; /* F5 processing */
BYTE askThisSingleCommand = FALSE; /* ?device= device?= */
BYTE DontAskThisSingleCommand = FALSE; /* !files= */
COUNT MenuTimeout = -1;
BYTE MenuSelected = 0;
UCOUNT MenuLine = 0;
UCOUNT Menus = 0;
STATIC VOID zumcb_init(UCOUNT seg, UWORD size);
STATIC VOID mumcb_init(UCOUNT seg, UWORD size);
STATIC VOID Config_Buffers(BYTE * pLine);
STATIC VOID sysScreenMode(BYTE * pLine);
STATIC VOID sysVersion(BYTE * pLine);
STATIC VOID CfgBreak(BYTE * pLine);
STATIC VOID Device(BYTE * pLine);
STATIC VOID DeviceHigh(BYTE * pLine);
STATIC VOID Files(BYTE * pLine);
STATIC VOID Fcbs(BYTE * pLine);
STATIC VOID CfgLastdrive(BYTE * pLine);
STATIC BOOL LoadDevice(BYTE * pLine, COUNT top, COUNT mode);
STATIC VOID Dosmem(BYTE * pLine);
STATIC VOID Country(BYTE * pLine);
STATIC VOID InitPgm(BYTE * pLine);
STATIC VOID InitPgmHigh(BYTE * pLine);
STATIC VOID CfgSwitchar(BYTE * pLine);
STATIC VOID CfgFailure(BYTE * pLine);
STATIC VOID CfgIgnore(BYTE * pLine);
STATIC VOID CfgMenu(BYTE * pLine);
STATIC VOID DoMenu(void);
STATIC VOID CfgMenuDefault(BYTE * pLine);
STATIC VOID Stacks(BYTE * pLine);
STATIC VOID SetAnyDos(BYTE * pLine);
STATIC VOID Numlock(BYTE * pLine);
STATIC BYTE * GetNumArg(BYTE * pLine, COUNT * pnArg);
BYTE *GetStringArg(BYTE * pLine, BYTE * pszString);
STATIC int SkipLine(char *pLine);
#if 0
STATIC char * stristr(char *s1, char *s2);
#endif
STATIC COUNT strcasecmp(REG BYTE * d, REG BYTE * s);
void HMAconfig(int finalize);
VOID config_init_buffers(COUNT anzBuffers); /* from BLOCKIO.C */
STATIC VOID FAR * AlignParagraph(VOID FAR * lpPtr);
#ifndef I86
#define AlignParagraph(x) ((VOID *)x)
#endif
#define EOF 0x1a
STATIC struct table * LookUp(struct table *p, BYTE * token);
typedef void config_sys_func_t(BYTE * pLine);
struct table {
BYTE *entry;
BYTE pass;
config_sys_func_t *func;
};
STATIC struct table commands[] = {
/* rem is never executed by locking out pass */
{"REM", 0, CfgIgnore},
{";", 0, CfgIgnore},
{"MENUDEFAULT", 0, CfgMenuDefault},
{"MENU", 0, CfgMenu}, /* lines to print in pass 0 */
{"ECHO", 2, CfgMenu}, /* lines to print in pass 2 - when devices are loaded */
{"BREAK", 1, CfgBreak},
{"BUFFERS", 1, Config_Buffers},
{"COMMAND", 1, InitPgm},
{"COUNTRY", 1, Country},
{"DOS", 1, Dosmem},
{"FCBS", 1, Fcbs},
{"FILES", 1, Files},
{"LASTDRIVE", 1, CfgLastdrive},
{"NUMLOCK", 1, Numlock},
{"SHELL", 1, InitPgm},
{"SHELLHIGH", 1, InitPgmHigh},
{"STACKS", 1, Stacks},
{"SWITCHAR", 1, CfgSwitchar},
{"SCREEN", 1, sysScreenMode}, /* JPP */
{"VERSION", 1, sysVersion}, /* JPP */
{"ANYDOS", 1, SetAnyDos}, /* JPP */
{"DEVICE", 2, Device},
{"DEVICEHIGH", 2, DeviceHigh},
/* {"INSTALL", 3, install}, would go here */
/* default action */
{"", -1, CfgFailure}
};
BYTE *pLineStart = 0;
BYTE HMAState = 0;
#define HMA_NONE 0 /* do nothing */
#define HMA_REQ 1 /* DOS = HIGH detected */
#define HMA_DONE 2 /* Moved kernel to HMA */
#define HMA_LOW 3 /* Definitely LOW */
STATIC void FAR* ConfigAlloc(COUNT bytes)
{
VOID FAR *p;
p = HMAalloc(bytes);
if (p == NULL)
p = KernelAlloc(bytes);
/* printf("ConfigAlloc %d at %p\n", bytes, p); */
return p;
}
/* Do first time initialization. Store last so that we can reset it */
/* later. */
void PreConfig(void)
{
VgaSet = 0;
UmbState = 0;
/* Initialize the base memory pointers */
#ifdef DEBUG
{
extern BYTE FAR ASM internal_data[];
printf("SDA located at 0x%p\n", internal_data);
}
#endif
/* Begin by initializing our system buffers */
/* the dms_scratch buffer is statically allocated
in the DSK module */
/* dma_scratch = (BYTE FAR *) KernelAllocDma(BUFFERSIZE); */
/* DebugPrintf(("Preliminary DMA scratchpad allocated at 0x%p\n",dma_scratch));*/
/* buffers = (struct buffer FAR *)
KernelAlloc(Config.cfgBuffers * sizeof(struct buffer)); */
#ifdef DEBUG
/* printf("Preliminary %d buffers allocated at 0x%p\n", Config.cfgBuffers, buffers);*/
#endif
/* Initialize the file table */
/* f_nodes = (f_node_ptr)
KernelAlloc(Config.cfgFiles * sizeof(struct f_node));*/
f_nodes = (f_node_ptr)
DynAlloc("f_nodes", Config.cfgFiles, sizeof(struct f_node));
f_nodes_cnt = Config.cfgFiles;
/* sfthead = (sfttbl FAR *)&basesft; */
/* FCBp = (sfttbl FAR *)&FcbSft; */
/* FCBp = (sfttbl FAR *)
KernelAlloc(sizeof(sftheader)
+ Config.cfgFiles * sizeof(sft)); */
lpBase = AlignParagraph((BYTE FAR *) DynLast() + 0x0f);
config_init_buffers(Config.cfgBuffers);
sfthead->sftt_next = (sfttbl FAR *)
KernelAlloc(sizeof(sftheader) + (Config.cfgFiles - 5) * sizeof(sft));
sfthead->sftt_next->sftt_next = (sfttbl FAR *) - 1;
sfthead->sftt_next->sftt_count = Config.cfgFiles - 5;
CDSp = KernelAlloc(sizeof(struct cds) * lastdrive);
DPBp = KernelAlloc(blk_dev.dh_name[0] * sizeof(struct dpb));
#ifdef DEBUG
printf("Preliminary:\n f_node 0x%x", f_nodes);
/* printf(" FCB table 0x%p\n",FCBp);*/
printf(" sft table 0x%p\n", sfthead->sftt_next);
printf(" CDS table 0x%p\n", CDSp);
printf(" DPB table 0x%p\n", DPBp);
#endif
/* Done. Now initialize the MCB structure */
/* This next line is 8086 and 80x86 real mode specific */
#ifdef DEBUG
printf("Preliminary allocation completed: top at 0x%p\n", lpBase);
#endif
#ifdef KDB
lpBase = malloc(4096);
first_mcb = FP_SEG(lpBase) + ((FP_OFF(lpBase) + 0x0f) >> 4);
#else
first_mcb = FP_SEG(lpBase) + ((FP_OFF(lpBase) + 0x0f) >> 4);
#endif
/* We expect ram_top as Kbytes, so convert to paragraphs */
mcb_init(first_mcb, ram_top * 64 - first_mcb - 1);
}
/* Do second pass initialization. */
/* Also, run config.sys to load drivers. */
void PostConfig(void)
{
/* close all (device) files */
/* compute lastdrive ... */
lastdrive = Config.cfgLastdrive;
if (lastdrive < nblkdev)
lastdrive = nblkdev;
/* initialize NEAR allocated things */
/* Initialize the file table */
DynFree(f_nodes);
f_nodes = (f_node_ptr)
DynAlloc("f_nodes", Config.cfgFiles, sizeof(struct f_node));
f_nodes_cnt = Config.cfgFiles; /* and the number of allocated files */
/* Initialize the base memory pointers from last time. */
/*
if the kernel could be moved to HMA, everything behind the dynamic
near data is free.
otherwise, the kernel is moved down - behind the dynamic allocated data,
and allocation starts after the kernel.
*/
lpBase = AlignParagraph((BYTE FAR *) DynLast() + 0x0f);
DebugPrintf(("starting FAR allocations at %p\n", lpBase));
/* Begin by initializing our system buffers */
/* dma_scratch = (BYTE FAR *) KernelAllocDma(BUFFERSIZE); */
#ifdef DEBUG
/* printf("DMA scratchpad allocated at 0x%p\n", dma_scratch); */
#endif
config_init_buffers(Config.cfgBuffers);
/* sfthead = (sfttbl FAR *)&basesft; */
/* FCBp = (sfttbl FAR *)&FcbSft; */
/* FCBp = KernelAlloc(sizeof(sftheader)
+ Config.cfgFiles * sizeof(sft)); */
sfthead->sftt_next =
KernelAlloc(sizeof(sftheader) + (Config.cfgFiles - 5) * sizeof(sft));
sfthead->sftt_next->sftt_next = (sfttbl FAR *) - 1;
sfthead->sftt_next->sftt_count = Config.cfgFiles - 5;
CDSp = KernelAlloc(sizeof(struct cds) * lastdrive);
DPBp = KernelAlloc(blk_dev.dh_name[0] * sizeof(struct dpb));
#ifdef DEBUG
printf("Final: \n f_node 0x%x\n", f_nodes);
/* printf(" FCB table 0x%p\n",FCBp);*/
printf(" sft table 0x%p\n", sfthead->sftt_next);
printf(" CDS table 0x%p\n", CDSp);
printf(" DPB table 0x%p\n", DPBp);
#endif
if (Config.cfgStacks)
{
VOID FAR *stackBase =
KernelAlloc(Config.cfgStacks * Config.cfgStackSize);
init_stacks(stackBase, Config.cfgStacks, Config.cfgStackSize);
DebugPrintf(("Stacks allocated at %p\n", stackBase));
}
DebugPrintf(("Allocation completed: top at 0x%p\n", lpBase));
}
/* This code must be executed after device drivers has been loaded */
VOID configDone(VOID)
{
if (HMAState != HMA_DONE)
{
lpBase = AlignParagraph(lpBase);
DebugPrintf(("HMA not available, moving text to %x\n",
FP_SEG(lpBase)));
MoveKernel(FP_SEG(lpBase));
lpBase = AlignParagraph((BYTE FAR *) lpBase + HMAFree + 0x0f);
DebugPrintf(("kernel is low, start alloc at %p", lpBase));
/* final buffer processing, now upwards */
HMAState = HMA_LOW;
config_init_buffers(Config.cfgBuffers);
}
if (lastdrive < nblkdev)
{
DebugPrintf(("lastdrive %c too small upping it to: %c\n",
lastdrive + 'A', nblkdev + 'A' - 1));
lastdrive = nblkdev;
CDSp = KernelAlloc(sizeof(struct cds) * lastdrive);
}
first_mcb = FP_SEG(lpBase) + ((FP_OFF(lpBase) + 0x0f) >> 4);
/* We expect ram_top as Kbytes, so convert to paragraphs */
mcb_init(first_mcb, ram_top * 64 - first_mcb - 1);
if (UmbState == 1)
{
UCOUNT umr_new = FP_SEG(upBase) + ((FP_OFF(upBase) + 0x0f) >> 4);
mumcb_init(ram_top * 64 - 1, umb_start - 64 * ram_top);
/* Check if any devices were loaded in umb */
if (umb_start != FP_SEG(upBase))
{
/* make last block normal with SC for the devices */
mumcb_init(umb_start, umr_new - umb_start - 1);
zumcb_init(umr_new, (umb_start + UMB_top) - umr_new - 1);
upBase += 16;
}
else
umr_new = FP_SEG(upBase);
{
/* are there any more UMB's ??
this happens, if memory mapped devces are in between
like UMB memory c800..c8ff, d8ff..efff with device at d000..d7ff
*/
/* TE - this code
a) isn't the best I ever wrote :-(
b) works for 2 memory areas (no while(), use of UMB_top,...)
and the first discovered is the larger one.
no idea what happens, if the larger one is higher in memory.
might work, though
*/
UCOUNT umb_seg, umb_size, umbz_root;
umbz_root = umr_new;
if (UMB_get_largest(&umb_seg, &umb_size))
{
mcb_init(umbz_root, (umb_start + UMB_top) - umr_new - 1);
/* change UMB 'Z' to 'M' */
((mcb FAR *) MK_FP(umbz_root, 0))->m_type = 'M';
/* move to end */
umbz_root += ((mcb FAR *) MK_FP(umbz_root, 0))->m_size + 1;
/* create link mcb */
mumcb_init(umbz_root, umb_seg - umbz_root - 1);
/* should the UMB driver return
adjacent memory in several pieces */
if (umb_seg - umbz_root - 1 == 0)
((mcb FAR *) MK_FP(umbz_root, 0))->m_psp = FREE_PSP;
/* create new 'Z' mcb */
zumcb_init(umb_seg, umb_size - 1);
}
}
}
DebugPrintf(("UMB Allocation completed: top at 0x%p\n", upBase));
/* The standard handles should be reopened here, because
we may have loaded new console or printer drivers in CONFIG.SYS */
}
VOID DoConfig(int pass)
{
COUNT nFileDesc;
BYTE *pLine;
BOOL bEof;
/* Set pass number */
nPass = pass;
/* Check to see if we have a config.sys file. If not, just */
/* exit since we don't force the user to have one. */
if ((nFileDesc = open("fdconfig.sys", 0)) >= 0)
{
DebugPrintf(("Reading FDCONFIG.SYS...\n"));
}
else
{
DebugPrintf(("FDCONFIG.SYS not found\n"));
if ((nFileDesc = open("config.sys", 0)) < 0)
{
DebugPrintf(("CONFIG.SYS not found\n"));
return;
}
DebugPrintf(("Reading CONFIG.SYS...\n"));
}
/* Have one -- initialize. */
nCfgLine = 0;
bEof = 0;
pLine = szLine;
/* Read each line into the buffer and then parse the line, */
/* do the table lookup and execute the handler for that */
/* function. */
for (; !bEof; nCfgLine++)
{
struct table *pEntry;
pLineStart = szLine;
/* read in a single line, \n or ^Z terminated */
for (pLine = szLine;;)
{
if (read(nFileDesc, pLine, 1) <= 0)
{
bEof = TRUE;
break;
}
/* immediately convert to upper case */
*pLine = toupper(*pLine);
if (pLine >= szLine + sizeof(szLine) - 3)
{
CfgFailure(pLine);
printf("error - line overflow line %d \n", nCfgLine);
break;
}
if (*pLine == '\n' || *pLine == EOF) /* end of line */
break;
if (*pLine == '\r') /* ignore */
;
else
pLine++;
}
*pLine = 0;
pLine = szLine;
/* Skip leading white space and get verb. */
pLine = scan(pLine, szBuf);
/* If the line was blank, skip it. Otherwise, look up */
/* the verb and execute the appropriate function. */
if (*szBuf == '\0')
continue;
pEntry = LookUp(commands, szBuf);
if (pEntry->pass >= 0 && pEntry->pass != nPass)
continue;
if (nPass == 0) /* pass 0 always executed (rem Menu prompt) */
{
(*(pEntry->func)) (pLine);
continue;
}
else
{
if (SkipLine(pLineStart)) /* F5/F8 processing */
continue;
}
if (pEntry->func != CfgMenu)
pLine = skipwh(pLine);
if ('=' != *pLine && pEntry->func != CfgMenu)
CfgFailure(pLine);
else /* YES. DO IT */
(*(pEntry->func)) (skipwh(pLine + 1));
/* might have been the UMB driver */
if (UmbState == 2)
{
UCOUNT umb_seg, umb_size;
if (UMB_get_largest(&umb_seg, &umb_size))
{
UmbState = 1;
upBase = MK_FP(umb_seg, 0);
UMB_top = umb_size;
umb_start = umb_seg;
/* reset root */
uppermem_root = ram_top * 64 - 1;
/* setup the real mcb for the devicehigh block */
zumcb_init(umb_seg, UMB_top - 1);
upBase += 16;
}
}
}
close(nFileDesc);
if (nPass == 0)
{
DoMenu();
}
}
STATIC struct table * LookUp(struct table *p, BYTE * token)
{
while (*(p->entry) != '\0')
{
if (strcasecmp(p->entry, token) == 0)
break;
else
++p;
}
return p;
}
/*
get BIOS key with timeout:
timeout < 0: no timeout
timeout = 0: poll only once
timeout > 0: timeout in seconds
return
0xffff : no key hit
0xHH.. : scancode in upper half
0x..LL : asciicode in lower half
*/
ULONG GetBiosTime(VOID)
{
return *(ULONG FAR *) (MK_FP(0x40, 0x6c));
}
UWORD GetBiosKey(int timeout)
{
iregs r;
ULONG startTime = GetBiosTime();
for (;;)
{
r.a.x = 0x0100; /* are there keys available ? */
init_call_intr(0x16, &r);
if ((r.flags & 0x40) == 0) /* yes - fetch and return */
{
r.a.x = 0x0000;
init_call_intr(0x16, &r);
return r.a.x;
}
if (timeout < 0)
continue;
if (GetBiosTime() - startTime >= (unsigned)timeout * 18)
break;
}
return 0xffff;
}
STATIC BOOL SkipLine(char *pLine)
{
short key;
if (InitKernelConfig.SkipConfigSeconds >= 0)
{
if (InitKernelConfig.SkipConfigSeconds > 0)
printf("Press F8 to trace or F5 to skip CONFIG.SYS/AUTOEXEC.BAT");
key = GetBiosKey(InitKernelConfig.SkipConfigSeconds); /* wait 2 seconds */
InitKernelConfig.SkipConfigSeconds = -1;
if (key == 0x3f00) /* F5 */
{
SkipAllConfig = TRUE;
}
if (key == 0x4200) /* F8 */
{
singleStep = TRUE;
}
printf("\r%79s\r", ""); /* clear line */
if (SkipAllConfig)
printf("Skipping CONFIG.SYS/AUTOEXEC.BAT\n");
}
if (SkipAllConfig)
return TRUE;
/* 1?device=CDROM.SYS */
/* 12?device=OAKROM.SYS */
/* 123?device=EMM386.EXE NOEMS */
if ( MenuLine != 0 &&
(MenuLine & (1 << MenuSelected)) == 0)
return TRUE;
if (DontAskThisSingleCommand) /* !files=30 */
return FALSE;
if (!askThisSingleCommand && !singleStep)
return FALSE;
printf("%s[Y,N]?", pLine);
for (;;)
{
key = GetBiosKey(-1);
switch (toupper(key & 0x00ff))
{
case 'N':
case 'n':
printf("N\n");
return TRUE;
case 0x1b: /* don't know where documented
ESCAPE answers all following questions
with YES
*/
singleStep = FALSE; /* and fall through */
case '\r':
case '\n':
case 'Y':
case 'y':
printf("Y\n");
return FALSE;
}
if (key == 0x3f00) /* YES, you may hit F5 here, too */
{
printf("N\n");
SkipAllConfig = TRUE;
return TRUE;
}
}
}
STATIC BYTE * GetNumArg(BYTE * pLine, COUNT * pnArg)
{
/* look for NUMBER */
pLine = skipwh(pLine);
if (!isnum(pLine) && *pLine != '-')
{
CfgFailure(pLine);
return (BYTE *) 0;
}
return GetNumber(pLine, pnArg);
}
BYTE *GetStringArg(BYTE * pLine, BYTE * pszString)
{
/* look for STRING */
pLine = skipwh(pLine);
/* just return whatever string is there, including null */
return scan(pLine, pszString);
}
STATIC void Config_Buffers(BYTE * pLine)
{
COUNT nBuffers;
/* Get the argument */
if (GetNumArg(pLine, &nBuffers) == (BYTE *) 0)
return;
/* Got the value, assign either default or new value */
Config.cfgBuffers =
(nBuffers < 0 ? nBuffers : max(Config.cfgBuffers, nBuffers));
}
STATIC VOID sysScreenMode(BYTE * pLine)
{
COUNT nMode;
/* Get the argument */
if (GetNumArg(pLine, &nMode) == (BYTE *) 0)
return;
if ((nMode != 0x11) && (nMode != 0x12) && (nMode != 0x14))
return;
/* Modes
0x11 (17) 28 lines
0x12 (18) 43/50 lines
0x14 (20) 25 lines
*/
#if defined(__TURBOC__)
_AX = (0x11 << 8) + nMode;
_BL = 0;
__int__(0x10);
#elif defined(I86)
asm
{
mov al, byte ptr nMode;
mov ah, 0x11;
mov bl, 0;
int 0x10;
}
#endif
}
STATIC VOID sysVersion(BYTE * pLine)
{
COUNT major, minor;
char *p;
p = pLine;
while (*p && *p != '.')
p++;
if (*p++ == '\0')
return;
/* Get major number */
if (GetNumArg(pLine, &major) == (BYTE *) 0)
return;
/* Get minor number */
if (GetNumArg(p, &minor) == (BYTE *) 0)
return;
printf("Changing reported version to %d.%d\n", major, minor);
os_major = major;
os_minor = minor;
}
STATIC VOID Files(BYTE * pLine)
{
COUNT nFiles;
/* Get the argument */
if (GetNumArg(pLine, &nFiles) == (BYTE *) 0)
return;
/* Got the value, assign either default or new value */
Config.cfgFiles = max(Config.cfgFiles, nFiles);
}
STATIC VOID CfgLastdrive(BYTE * pLine)
{
/* Format: LASTDRIVE = letter */
BYTE drv;
pLine = skipwh(pLine);
drv = *pLine & ~0x20;
if (drv < 'A' || drv > 'Z')
{
CfgFailure(pLine);
return;
}
drv -= 'A';
drv++; /* Make real number */
Config.cfgLastdrive = max(Config.cfgLastdrive, drv);
}
/*
UmbState of confidence, 1 is sure, 2 maybe, 4 unknown and 0 no way.
*/
STATIC VOID Dosmem(BYTE * pLine)
{
BYTE *pTmp;
BYTE UMBwanted = FALSE;
/* extern BYTE FAR INITDataSegmentClaimed; */
pLine = GetStringArg(pLine, szBuf);
for (pTmp = szBuf; *pTmp != '\0'; pTmp++)
*pTmp = toupper(*pTmp);
/* printf("DOS called with %s\n", szBuf); */
for (pTmp = szBuf;;)
{
if (fmemcmp(pTmp, "UMB", 3) == 0)
{
UMBwanted = TRUE;
pTmp += 3;
}
if (fmemcmp(pTmp, "HIGH", 4) == 0)
{
HMAState = HMA_REQ;
pTmp += 4;
}
/* if (fmemcmp(pTmp, "CLAIMINIT",9) == 0) { INITDataSegmentClaimed = 0; pTmp += 9; }*/
pTmp = skipwh(pTmp);
if (*pTmp != ',')
break;
pTmp++;
}
if (UmbState == 0)
{
uppermem_link = 0;
uppermem_root = 0xffff;
UmbState = UMBwanted ? 2 : 0;
}
/* Check if HMA is available straight away */
if (HMAState == HMA_REQ && MoveKernelToHMA())
{
HMAState = HMA_DONE;
}
}
STATIC VOID CfgSwitchar(BYTE * pLine)
{
/* Format: SWITCHAR = character */
GetStringArg(pLine, szBuf);
switchar = *szBuf;
}
STATIC VOID Fcbs(BYTE * pLine)
{
/* Format: FCBS = totalFcbs [,protectedFcbs] */
COUNT fcbs;
if ((pLine = GetNumArg(pLine, &fcbs)) == 0)
return;
Config.cfgFcbs = fcbs;
pLine = skipwh(pLine);
if (*pLine == ',')
{
GetNumArg(++pLine, &fcbs);
Config.cfgProtFcbs = fcbs;
}
if (Config.cfgProtFcbs > Config.cfgFcbs)
Config.cfgProtFcbs = Config.cfgFcbs;
}
/* LoadCountryInfo():
* Searches a file in the COUNTRY.SYS format for an entry
* matching the specified code page and country code, and loads
* the corresponding information into memory. If code page is 0,
* the default code page for the country will be used.
*
* Returns TRUE if successful, FALSE if not.
*/
STATIC BOOL LoadCountryInfo(char *filename, UWORD ctryCode, UWORD codePage)
{
/* printf("cntry: %u, CP%u, file=\"%s\"\n", ctryCode, codePage, filename); */
printf("Sorry, the COUNTRY= statement has been temporarily disabled\n");
UNREFERENCED_PARAMETER(codePage);
UNREFERENCED_PARAMETER(ctryCode);
UNREFERENCED_PARAMETER(filename);
return FALSE;
}
STATIC VOID Country(BYTE * pLine)
{
/* Format: COUNTRY = countryCode, [codePage], filename */
COUNT ctryCode;
COUNT codePage;
if ((pLine = GetNumArg(pLine, &ctryCode)) == 0)
return;
pLine = skipwh(pLine);
if (*pLine == ',')
{
pLine = skipwh(pLine + 1);
if (*pLine == ',')
{
codePage = NLS_DEFAULT;
}
else
{
if ((pLine = GetNumArg(pLine, &codePage)) == 0)
return;
}
pLine = skipwh(pLine);
if (*pLine == ',')
{
GetStringArg(++pLine, szBuf);
if (LoadCountryInfo(szBuf, ctryCode, codePage))
return;
}
}
CfgFailure(pLine);
}
STATIC VOID Stacks(BYTE * pLine)
{
COUNT stacks;
/* Format: STACKS = stacks [, stackSize] */
pLine = GetNumArg(pLine, &stacks);
Config.cfgStacks = stacks;
pLine = skipwh(pLine);
if (*pLine == ',')
{
GetNumArg(++pLine, &stacks);
Config.cfgStackSize = stacks;
}
if (Config.cfgStacks)
{
if (Config.cfgStackSize < 32)
Config.cfgStackSize = 32;
if (Config.cfgStackSize > 512)
Config.cfgStackSize = 512;
if (Config.cfgStacks > 64)
Config.cfgStacks = 64;
}
}
STATIC VOID InitPgmHigh(BYTE * pLine)
{
InitPgm(pLine);
Config.cfgP_0_startmode = 0x80;
}
STATIC VOID InitPgm(BYTE * pLine)
{
/* Get the string argument that represents the new init pgm */
pLine = GetStringArg(pLine, Config.cfgInit);
/* Now take whatever tail is left and add it on as a single */
/* string. */
strcpy(Config.cfgInitTail, pLine);
/* and add a DOS new line just to be safe */
strcat(Config.cfgInitTail, "\r\n");
Config.cfgP_0_startmode = 0;
}
STATIC VOID CfgBreak(BYTE * pLine)
{
/* Format: BREAK = (ON | OFF) */
GetStringArg(pLine, szBuf);
break_ena = strcasecmp(szBuf, "OFF") ? 1 : 0;
}
STATIC VOID Numlock(BYTE * pLine)
{
extern VOID ASMCFUNC keycheck(void);
/* Format: NUMLOCK = (ON | OFF) */
BYTE FAR *keyflags = (BYTE FAR *) MK_FP(0x40, 0x17);
GetStringArg(pLine, szBuf);
*keyflags &= ~32;
*keyflags |= strcasecmp(szBuf, "OFF") ? 32 : 0;
keycheck();
}
STATIC VOID DeviceHigh(BYTE * pLine)
{
if (UmbState == 1)
{
if (LoadDevice(pLine, UMB_top, TRUE) == DE_NOMEM)
{
printf("Not enough free memory in UMB's: loading low\n");
LoadDevice(pLine, ram_top, FALSE);
}
}
else
{
printf("UMB's unavailable!\n");
LoadDevice(pLine, ram_top, FALSE);
}
}
STATIC void Device(BYTE * pLine)
{
LoadDevice(pLine, ram_top, FALSE);
}
STATIC BOOL LoadDevice(BYTE * pLine, COUNT top, COUNT mode)
{
exec_blk eb;
struct dhdr FAR *dhp;
struct dhdr FAR *next_dhp;
BOOL result;
if (mode)
dhp = AlignParagraph(upBase);
else
dhp = AlignParagraph(lpBase);
/* Get the device driver name */
GetStringArg(pLine, szBuf);
/* The driver is loaded at the top of allocated memory. */
/* The device driver is paragraph aligned. */
eb.load.reloc = eb.load.load_seg = FP_SEG(dhp);
#ifdef DEBUG
printf("Loading device driver %s at segment %04x\n", szBuf, FP_SEG(dhp));
#endif
if ((result = init_DosExec(3, &eb, szBuf)) != SUCCESS)
{
CfgFailure(pLine);
return result;
}
strcpy(szBuf, pLine);
/* TE this fixes the loading of devices drivers with
multiple devices in it. NUMEGA's SoftIce is such a beast
*/
/* add \r\n to the command line */
strcat(szBuf, "\r\n");
for (next_dhp = NULL; FP_OFF(next_dhp) != 0xffff &&
(result = init_device(dhp, szBuf, mode, top)) == SUCCESS;
dhp = next_dhp)
{
next_dhp = dhp->dh_next;
if (FP_SEG(next_dhp) == 0xffff)
/* Does this ever occur with FP_OFF(next_dhp) != 0xffff ??? */
next_dhp = MK_FP(FP_SEG(dhp), FP_OFF(next_dhp));
#ifdef DEBUG
else if (FP_OFF(next_dhp) != 0xffff) /* end of internal chain */
printf("multisegmented device driver found, next %p\n", next_dhp);
/* give warning message */
#endif
/* Link in device driver and save nul_dev pointer to next */
dhp->dh_next = nul_dev.dh_next;
nul_dev.dh_next = dhp;
}
/* We could just have loaded FDXMS or HIMEM */
if (HMAState == HMA_REQ && MoveKernelToHMA())
{
/* final HMA processing: */
/* final buffer processing, now upwards */
HMAState = HMA_DONE;
config_init_buffers(Config.cfgBuffers);
}
return result;
}
STATIC VOID CfgFailure(BYTE * pLine)
{
BYTE *pTmp = pLineStart;
static UBYTE ErrorAlreadyPrinted[128];
/* suppress multiple printing of same unrecognized lines */
if (nCfgLine < sizeof(ErrorAlreadyPrinted)*8)
{
if (ErrorAlreadyPrinted[nCfgLine/8] & (1 << (nCfgLine%8)))
return;
ErrorAlreadyPrinted[nCfgLine/8] |= (1 << (nCfgLine%8));
}
printf("CONFIG.SYS error in line %d\n", nCfgLine);
printf(">>>%s\n ", pTmp);
while (++pTmp != pLine)
printf(" ");
printf("^\n");
}
#ifndef KDB
void FAR * KernelAlloc(size_t nBytes)
{
BYTE FAR *lpAllocated;
lpBase = AlignParagraph(lpBase);
lpAllocated = lpBase;
if (0xffff - FP_OFF(lpBase) <= nBytes)
{
UWORD newOffs = (FP_OFF(lpBase) + nBytes) & 0xFFFF;
UWORD newSeg = FP_SEG(lpBase) + 0x1000;
lpBase = MK_FP(newSeg, newOffs);
}
else
lpBase += nBytes;
fmemset(lpAllocated, 0, nBytes);
return lpAllocated;
}
#endif
#ifdef I86
/*
STATIC BYTE FAR * KernelAllocDma(WORD bytes)
{
BYTE FAR *allocated;
lpBase = AlignParagraph(lpBase);
if ((FP_SEG(lpBase) & 0x0fff) + (bytes >> 4) > 0x1000)
lpBase = MK_FP((FP_SEG(lpBase) + 0x0fff) & 0xf000, 0);
allocated = lpBase;
lpBase += bytes;
return allocated;
}
*/
STATIC void FAR * AlignParagraph(VOID FAR * lpPtr)
{
UWORD uSegVal;
/* First, convert the segmented pointer to linear address */
uSegVal = FP_SEG(lpPtr);
uSegVal += (FP_OFF(lpPtr) + 0xf) >> 4;
if (FP_OFF(lpPtr) > 0xfff0)
uSegVal += 0x1000; /* handle overflow */
/* and return an adddress adjusted to the nearest paragraph */
/* boundary. */
return MK_FP(uSegVal, 0);
}
#endif
STATIC BYTE * skipwh(BYTE * s)
{
while (*s && (*s == 0x0d || *s == 0x0a || *s == ' ' || *s == '\t'))
++s;
return s;
}
STATIC BYTE * scan(BYTE * s, BYTE * d)
{
askThisSingleCommand = FALSE;
DontAskThisSingleCommand = FALSE;
s = skipwh(s);
MenuLine = 0;
/* does the line start with "123?" */
if (isnum(s))
{
unsigned numbers = 0;
for ( ; isnum(s); s++)
numbers |= 1 << (*s -'0');
if (*s == '?')
{
MenuLine = numbers;
Menus |= numbers;
s = skipwh(s+1);
}
}
/* !dos=high,umb ?? */
if (*s == '!')
{
DontAskThisSingleCommand = TRUE;
s = skipwh(s+1);
}
if (*s == ';')
{
/* semicolon is a synonym for rem */
*d++ = *s++;
}
else
while (*s &&
!(*s == 0x0d
|| *s == 0x0a || *s == ' ' || *s == '\t' || *s == '='))
{
if (*s == '?')
{
askThisSingleCommand = TRUE;
s++;
}
else
*d++ = *s++;
}
*d = '\0';
return s;
}
/*
BYTE *scan_seperator(BYTE * s, BYTE * d)
{
s = skipwh(s);
if (*s)
*d++ = *s++;
*d = '\0';
return s;
}
*/
STATIC BOOL isnum(BYTE * pLine)
{
return (*pLine >= '0' && *pLine <= '9');
}
/* JPP - changed so will accept hex number. */
STATIC BYTE * GetNumber(REG BYTE * pszString, REG COUNT * pnNum)
{
BYTE Base = 10;
BOOL Sign = FALSE;
*pnNum = 0;
if (*pszString == '-')
{
pszString++;
Sign = TRUE;
}
while (isnum(pszString) || toupper(*pszString) == 'X')
{
if (toupper(*pszString) == 'X')
{
Base = 16;
pszString++;
}
else
*pnNum = *pnNum * Base + (*pszString++ - '0');
}
if (Sign)
*pnNum = -*pnNum;
return pszString;
}
/* Yet another change for true portability (WDL) */
#if 0
STATIC COUNT tolower(COUNT c)
{
if (c >= 'A' && c <= 'Z')
return (c + ('a' - 'A'));
else
return c;
}
#endif
/* Yet another change for true portability (PJV) */
STATIC COUNT toupper(COUNT c)
{
if (c >= 'a' && c <= 'z')
return (c - ('a' - 'A'));
else
return c;
}
/* The following code is 8086 dependant */
#if 1 /* ifdef KERNEL */
STATIC VOID mcb_init(UCOUNT seg, UWORD size)
{
COUNT i;
mcb FAR *mcbp = MK_FP(seg, 0);
mcbp->m_type = MCB_LAST;
mcbp->m_psp = FREE_PSP;
mcbp->m_size = (UmbState > 0 ? size - 1 : size);
for (i = 0; i < 8; i++)
mcbp->m_name[i] = '\0';
mem_access_mode = FIRST_FIT;
}
STATIC VOID zumcb_init(UCOUNT seg, UWORD size)
{
COUNT i;
mcb FAR *mcbp = MK_FP(seg, 0);
mcbp->m_type = MCB_LAST;
mcbp->m_psp = FREE_PSP;
mcbp->m_size = size;
for (i = 0; i < 8; i++)
mcbp->m_name[i] = '\0';
}
STATIC VOID mumcb_init(UCOUNT seg, UWORD size)
{
COUNT i;
mcb FAR *mcbp = MK_FP(seg, 0);
static char name[8] = "SC\0\0\0\0\0\0";
mcbp->m_type = MCB_NORMAL;
mcbp->m_psp = 8;
mcbp->m_size = size;
for (i = 0; i < 8; i++)
mcbp->m_name[i] = name[i];
}
#endif
char *strcat(register char * d, register const char * s)
{
char *tmp = d;
while (*d != 0)
++d;
strcpy(d, s);
return tmp;
}
#if 0
/* see if the second string is contained in the first one, ignoring case */
STATIC char * stristr(char *s1, char *s2)
{
int loop;
for (; *s1; s1++)
for (loop = 0;; loop++)
{
if (s2[loop] == 0) /* found end of string 2 -> success */
{
return s1; /* position where s2 was found */
}
if (toupper(s1[loop]) != toupper(s2[loop]))
break;
}
return NULL;
}
#endif
/* compare two ASCII strings ignoring case */
STATIC COUNT strcasecmp(REG BYTE * d, REG BYTE * s)
{
while (*s != '\0' && *d != '\0')
{
if (toupper(*d) == toupper(*s))
++s, ++d;
else
return toupper(*d) - toupper(*s);
}
return toupper(*d) - toupper(*s);
}
/*
moved from BLOCKIO.C here.
that saves some relocation problems
*/
VOID config_init_buffers(COUNT anzBuffers)
{
REG WORD i;
struct buffer FAR *pbuffer;
int HMAcount = 0;
BYTE FAR *tmplpBase = lpBase;
BOOL fillhma = TRUE;
if (anzBuffers < 0)
{
anzBuffers = -anzBuffers;
fillhma = FALSE;
}
anzBuffers = max(anzBuffers, 6);
if (anzBuffers > 99)
{
printf("BUFFERS=%u not supported, reducing to 99\n", anzBuffers);
anzBuffers = 99;
}
LoL_nbuffers = anzBuffers;
lpTop = lpOldTop;
if (HMAState == HMA_NONE || HMAState == HMA_REQ)
lpTop = lpBase = lpTop - anzBuffers * (sizeof(struct buffer) + 0xf);
firstbuf = ConfigAlloc(sizeof(struct buffer));
pbuffer = firstbuf;
DebugPrintf(("init_buffers (size %u) at", sizeof(struct buffer)));
for (i = 0;; ++i)
{
if (FP_SEG(pbuffer) == 0xffff)
HMAcount++;
pbuffer->b_dummy = FP_OFF(pbuffer);
pbuffer->b_unit = 0;
pbuffer->b_flag = 0;
pbuffer->b_blkno = 0;
pbuffer->b_next = NULL;
DebugPrintf((" (%d,%p)", i, pbuffer));
/* now, we can have quite some buffers in HMA
-- up to 37 for KE38616.
so we fill the HMA with buffers
but not if the BUFFERS count is negative ;-)
*/
if (i < (anzBuffers - 1))
{
pbuffer->b_next = HMAalloc(sizeof(struct buffer));
if (pbuffer->b_next == NULL)
{
/* if more buffer requested then fit into HMA, allocate
some from low memory as rewuested
*/
pbuffer->b_next = ConfigAlloc(sizeof(struct buffer));
}
}
else if (fillhma)
pbuffer->b_next = HMAalloc(sizeof(struct buffer));
if (pbuffer->b_next == NULL)
break;
pbuffer = pbuffer->b_next;
}
DebugPrintf((" done\n"));
if (HMAcount)
printf("Kernel: allocated %d Diskbuffers = %u Bytes in HMA\n",
HMAcount, HMAcount * sizeof(struct buffer));
if (HMAState == HMA_NONE || HMAState == HMA_REQ)
lpBase = tmplpBase;
}
/*
Undocumented feature:
ANYDOS
will report to MSDOS programs just the version number
they expect. be careful with it!
*/
STATIC VOID SetAnyDos(BYTE * pLine)
{
UNREFERENCED_PARAMETER(pLine);
ReturnAnyDosVersionExpected = TRUE;
}
STATIC VOID CfgIgnore(BYTE * pLine)
{
UNREFERENCED_PARAMETER(pLine);
}
/*
'MENU'ing stuff
although it's worse then MSDOS's , its better then nothing
*/
STATIC VOID CfgMenu(BYTE * pLine)
{
printf("%s\n",pLine);
}
STATIC VOID DoMenu(void)
{
if (Menus == 0)
return;
InitKernelConfig.SkipConfigSeconds = -1;
Menus |= 1 << 0; /* '0' Menu always allowed */
printf("\n\n");
for (;;)
{
int key,i;
printf("\rSinglestepping (F8) is :%s - ", singleStep ? "ON " : "OFF");
printf("please select a Menu[");
for (i = 0; i <= 9; i++)
if (Menus & (1 << i))
printf("%c", '0' + i);
printf("]");
key = GetBiosKey(MenuTimeout);
MenuTimeout = -1;
if (key == -1) /* timeout, take default */
{
break;
}
if (key == 0x3f00) /* F5 */
{
SkipAllConfig = TRUE;
break;
}
if (key == 0x4200) /* F8 */
{
singleStep = !singleStep;
}
key &= 0xff;
if (key == '\r') /* CR - use default */
{
break;
}
if (key == 0x1b) /* ESC - use default */
{
break;
}
printf("%c", key);
if (key >= '0' && key <= '9')
if (Menus & (1 << (key - '0')))
{
MenuSelected = key - '0'; break;
}
}
printf("\n");
}
STATIC VOID CfgMenuDefault(BYTE * pLine)
{
COUNT num = 0;
pLine = skipwh(pLine);
if ('=' != *pLine)
{
CfgFailure(pLine);
return;
}
pLine = skipwh(pLine + 1);
/* Format: STACKS = stacks [, stackSize] */
pLine = GetNumArg(pLine, &num);
MenuSelected = num;
pLine = skipwh(pLine);
if (*pLine == ',')
{
GetNumArg(++pLine, &MenuTimeout);
}
}
/*
* Log: config.c,v - for newer log entries see "cvs log config.c"
*
* Revision 1.15 2000/03/31 05:40:09 jtabor
* Added Eric W. Biederman Patches
*
* Revision 1.14 2000/03/17 22:59:04 kernel
* Steffen Kaiser's NLS changes
*
* Revision 1.13 2000/03/09 06:07:10 kernel
* 2017f updates by James Tabor
*
* Revision 1.12 1999/09/23 04:40:46 jprice
* *** empty log message ***
*
* Revision 1.10 1999/08/25 03:18:07 jprice
* ror4 patches to allow TC 2.01 compile.
*
* Revision 1.9 1999/05/03 06:25:45 jprice
* Patches from ror4 and many changed of signed to unsigned variables.
*
* Revision 1.8 1999/04/16 21:43:40 jprice
* ror4 multi-sector IO
*
* Revision 1.7 1999/04/16 12:21:21 jprice
* Steffen c-break handler changes
*
* Revision 1.6 1999/04/16 00:53:32 jprice
* Optimized FAT handling
*
* Revision 1.5 1999/04/12 03:21:17 jprice
* more ror4 patches. Changes for multi-block IO
*
* Revision 1.4 1999/04/11 04:33:38 jprice
* ror4 patches
*
* Revision 1.2 1999/04/04 22:57:47 jprice
* no message
*
* Revision 1.1.1.1 1999/03/29 15:40:46 jprice
* New version without IPL.SYS
*
* Revision 1.6 1999/03/23 23:38:15 jprice
* Now checks for a reads fdconfig.sys file, if exists
*
* Revision 1.5 1999/02/08 05:55:57 jprice
* Added Pat's 1937 kernel patches
*
* Revision 1.4 1999/02/01 01:48:41 jprice
* Clean up; Now you can use hex numbers in config.sys. added config.sys screen function to change screen mode (28 or 43/50 lines)
*
* Revision 1.3 1999/01/30 08:28:11 jprice
* Clean up; Fixed bug with set attribute function.
*
* Revision 1.2 1999/01/22 04:13:25 jprice
* Formating
*
* Revision 1.1.1.1 1999/01/20 05:51:01 jprice
* Imported sources
*
*
* Rev 1.6 22 Jan 1998 4:09:24 patv
* Fixed pointer problems affecting SDA
*
* Rev 1.5 04 Jan 1998 23:15:18 patv
* Changed Log for strip utility
*
* Rev 1.4 04 Jan 1998 17:26:14 patv
* Corrected subdirectory bug
*
* Rev 1.3 16 Jan 1997 12:46:50 patv
* pre-Release 0.92 feature additions
*
* Rev 1.1 29 May 1996 21:03:44 patv
* bug fixes for v0.91a
*
* Rev 1.0 19 Feb 1996 3:22:16 patv
* Added NLS, int2f and config.sys processing
*/
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