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dosbox-wii/src/dos/dos.cpp
Carl.Kenner 0284615f36 DOSBox 0.55
2009-05-02 21:12:18 +00:00

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/*
* Copyright (C) 2002 The DOSBox Team
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include "dosbox.h"
#include "bios.h"
#include "mem.h"
#include "callback.h"
#include "regs.h"
#include "dos_inc.h"
DOS_Block dos;
DOS_InfoBlock dosInfoBlock;
static Bit8u dos_copybuf[0x10000];
static Bitu call_20,call_21,call_theend;
void DOS_SetError(Bit16u code) {
dos.errorcode=code;
};
#define DOSNAMEBUF 256
static Bitu DOS_21Handler(void) {
//TODO KEYBOARD Check for break
char name1[DOSNAMEBUF+1];
char name2[DOSNAMEBUF+1];
switch (reg_ah) {
case 0x00: /* Terminate Program */
E_Exit("DOS:Unhandled call %02X",reg_ah);
break;
case 0x01: /* Read character from STDIN, with echo */
{
Bit8u c;Bit16u n=1;
DOS_ReadFile(STDIN,&c,&n);
reg_al=c;
DOS_WriteFile(STDOUT,&c,&n);
}
break;
case 0x02: /* Write character to STDOUT */
{
Bit8u c=reg_dl;Bit16u n=1;
DOS_WriteFile(STDOUT,&c,&n);
}
break;
case 0x03: /* Read character from STDAUX */
case 0x04: /* Write Character to STDAUX */
case 0x05: /* Write Character to PRINTER */
E_Exit("DOS:Unhandled call %02X",reg_ah);
break;
case 0x06: /* Direct Console Output / Input */
switch (reg_dl) {
case 0xFF: /* Input */
{
//TODO Make this better according to standards
if (!DOS_GetSTDINStatus()) {
CALLBACK_SZF(true);
break;
}
Bit8u c;Bit16u n=1;
DOS_ReadFile(STDIN,&c,&n);
reg_al=c;
CALLBACK_SZF(false);
break;
}
default:
{
Bit8u c=reg_dl;Bit16u n=1;
DOS_WriteFile(STDOUT,&c,&n);
}
break;
};
break;
case 0x07: /* Character Input, without echo */
{
Bit8u c;Bit16u n=1;
DOS_ReadFile (STDIN,&c,&n);
reg_al=c;
break;
};
case 0x08: /* Direct Character Input, without echo */
{
Bit8u c;Bit16u n=1;
DOS_ReadFile (STDIN,&c,&n);
reg_al=c;
break;
};
case 0x09: /* Write string to STDOUT */
{
Bit8u c;Bit16u n=1;
PhysPt buf=SegPhys(ds)+reg_dx;
while ((c=mem_readb(buf++))!='$') {
DOS_WriteFile(STDOUT,&c,&n);
}
}
break;
case 0x0a: /* Buffered Input */
{
//TODO ADD Break checkin in STDIN but can't care that much for it
PhysPt data=SegPhys(ds)+reg_dx;
Bit8u free=mem_readb(data);
Bit8u read=0;Bit8u c;Bit16u n=1;
if (!free) break;
while (read<free) {
DOS_ReadFile(STDIN,&c,&n);
DOS_WriteFile(STDOUT,&c,&n);
mem_writeb(data+read+2,c);
if (c==13)
break;
read++;
};
mem_writeb(data+1,read);
break;
};
case 0x0b: /* Get STDIN Status */
if (DOS_GetSTDINStatus()) reg_al=0xff;
else reg_al=0;
break;
case 0x0c: /* Flush Buffer and read STDIN call */
{
switch (reg_al) {
case 0x1:
case 0x6:
case 0x7:
case 0x8:
case 0xa:
{
Bit8u oldah=reg_ah;
reg_ah=reg_al;
DOS_21Handler();
reg_ah=oldah;
}
break;
default:
LOG_ERROR("DOS:0C:Illegal Flush STDIN Buffer call %d",reg_al);
break;
}
}
break;
//TODO Find out the values for when reg_al!=0
//TODO Hope this doesn't do anything special
case 0x0d: /* Disk Reset */
//Sure let's reset a virtual disk
break;
case 0x0e: /* Select Default Drive */
DOS_SetDefaultDrive(reg_dl);
reg_al=26;
break;
case 0x0f: /* Open File using FCB */
if(DOS_FCBOpen(SegValue(ds),reg_dx)){
reg_al=0;
}else{
reg_al=0xff;
}
LOG_DEBUG("DOS:0x0f FCB-fileopen used, result:al=%d",reg_al);
break;
case 0x10: /* Close File using FCB */
if(DOS_FCBClose(SegValue(ds),reg_dx)){
reg_al=0;
}else{
reg_al=0xff;
}
LOG_DEBUG("DOS:0x10 FCB-fileclose used, result:al=%d",reg_al);
break;
case 0x11: /* Find First Matching File using FCB */
if(DOS_FCBFindFirst(SegValue(ds),reg_dx)){
reg_al=0;
}else{
reg_al=0xff;
}
LOG_DEBUG("DOS:0x11 FCB-FindFirst used, result:al=%d",reg_al);
break;
case 0x12: /* Find Next Matching File using FCB */
if(DOS_FCBFindNext(SegValue(ds),reg_dx)){
reg_al=0;
}else{
reg_al=0xff;
}
LOG_DEBUG("DOS:0x12 FCB-FindNext used, result:al=%d",reg_al);
break;
case 0x13: /* Delete File using FCB */
case 0x14: /* Sequential read from FCB */
case 0x15: /* Sequential write to FCB */
case 0x16: /* Create or truncate file using FCB */
case 0x17: /* Rename file using FCB */
case 0x21: /* Read random record from FCB */
case 0x22: /* Write random record to FCB */
case 0x23: /* Get file size for FCB */
case 0x24: /* Set Random Record number for FCB */
case 0x27: /* Random block read from FCB */
case 0x28: /* Random Block read to FCB */
LOG_ERROR("DOS:Unhandled call %02X, FCB Stuff",reg_ah);
reg_al=0xff; /* FCB Calls FAIL */
//CALLBACK_SCF(true); not needed.
break;
case 0x29: /* Parse filename into FCB */
{ Bit8u difference;
char string[1024];
MEM_StrCopy(SegPhys(ds)+reg_si,string,1024);
reg_al=FCB_Parsename(SegValue(es),reg_di,reg_al ,string, &difference);
reg_di+=difference;
}
LOG_DEBUG("DOS:29:FCB Parse Filename, result:al=%d",reg_al);
break;
case 0x18: /* NULL Function for CP/M compatibility or Extended rename FCB */
case 0x1d: /* NULL Function for CP/M compatibility or Extended rename FCB */
case 0x1e: /* NULL Function for CP/M compatibility or Extended rename FCB */
case 0x20: /* NULL Function for CP/M compatibility or Extended rename FCB */
case 0x6b: /* NULL Function */
case 0x61: /* UNUSED */
reg_al=0;
break;
case 0x19: /* Get current default drive */
reg_al=DOS_GetDefaultDrive();
break;
case 0x1a: /* Set Disk Transfer Area Address */
dos.dta=RealMakeSeg(ds,reg_dx);
break;
case 0x1c: /* Get allocation info for specific drive */
LOG_DEBUG("DOS: Allocation Info call not supported correctly");
SegSet16(ds,0xf000);
reg_bx=0;
real_writeb(0xf000,0,0);
reg_al=0x7f;
reg_cx=0x200;
reg_dx=0x1000;
break; /* TODO maybe but hardly think a game needs this */
case 0x1b: /* Get allocation info for default drive */
LOG_DEBUG("DOS: Allocation Info call not supported correctly");
SegSet16(ds,0xf000);
reg_bx=0;
real_writeb(0xf000,0,0);
reg_al=0x7f;
reg_cx=0x200;
reg_dx=0x1000;
break;
case 0x1f: /* Get drive parameter block for default drive */
case 0x32: /* Get drive parameter block for specific drive */
E_Exit("DOS:Unhandled call %02X",reg_ah);
break; /* TODO maybe but hardly think a game needs this */
case 0x25: /* Set Interrupt Vector */
RealSetVec(reg_al,RealMakeSeg(ds,reg_dx));
break;
case 0x26: /* Create new PSP */
DOS_NewPSP(reg_dx);
break;
case 0x2a: /* Get System Date */
reg_al=0; /* It's always sunday TODO find that correct formula */
reg_cx=dos.date.year;
reg_dh=dos.date.month;
reg_dl=dos.date.day;
break;
case 0x2b: /* Set System Date */
//TODO Check for months with less then 31 days
if (reg_cx<1980) { reg_al=0xff;break;}
if ((reg_dh>12) || (reg_dh==0)) { reg_al=0xff;break;}
if ((reg_dl>31) || (reg_dl==0)) { reg_al=0xff;break;}
dos.date.year=reg_cx;
dos.date.month=reg_dh;
dos.date.day=reg_dl;
reg_al=0;
break;
case 0x2c: /* Get System Time */
//TODO Get time through bios calls date is fixed
{
Bit32u ticks=mem_readd(BIOS_TIMER);
Bit32u seconds=(ticks*10)/182;
reg_ch=(Bit8u)(seconds/3600);
reg_cl=(Bit8u)(seconds % 3600)/60;
reg_dh=(Bit8u)(seconds % 60);
reg_dl=(Bit8u)(ticks % 19)*5;
}
break;
case 0x2d: /* Set System Time */
LOG_DEBUG("DOS:Set System Time not supported");
reg_al=0; /* Noone is changing system time */
break;
case 0x2e: /* Set Verify flag */
dos.verify=(reg_al==1);
break;
case 0x2f: /* Get Disk Transfer Area */
SegSet16(es,RealSeg(dos.dta));
reg_bx=RealOff(dos.dta);
break;
case 0x30: /* Get DOS Version */
if (reg_al==0) reg_bh=0xFF; /* Fake Microsoft DOS */
if (reg_al==1) reg_bh=0x10; /* DOS is in HMA */
reg_al=dos.version.major;
reg_ah=dos.version.minor;
break;
case 0x31: /* Terminate and stay resident */
//TODO First get normal files executing
DOS_ResizeMemory(dos.psp,&reg_dx);
if (DOS_Terminate(true)) {
dos.return_code=reg_al;
dos.return_mode=RETURN_TSR;
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x33: /* Extended Break Checking */
switch (reg_al) {
case 0:reg_dl=dos.breakcheck;break; /* Get the breakcheck flag */
case 1:dos.breakcheck=(reg_dl>0);break; /* Set the breakcheck flag */
case 2:{bool old=dos.breakcheck;dos.breakcheck=(reg_dl>0);reg_dl=old;}break;
case 5:reg_dl=3;break; /* Always boot from c: :) */
case 6: /* Get true version number */
reg_bl=dos.version.major;
reg_bh=dos.version.minor;
reg_dl=dos.version.revision;
reg_dh=0x10; /* Dos in HMA */
break;
default:
E_Exit("DOS:Illegal 0x33 Call %2X",reg_al);
}
break;
case 0x34: /* Get INDos Flag */
SegSet16(es,RealSeg(dos.tables.indosflag));
reg_bx=RealOff(dos.tables.indosflag);
break;
case 0x35: /* Get interrupt vector */
reg_bx=real_readw(0,((Bit16u)reg_al)*4);
SegSet16(es,real_readw(0,((Bit16u)reg_al)*4+2));
break;
case 0x36: /* Get Free Disk Space */
{
Bit16u bytes,sectors,clusters,free;
if (DOS_GetFreeDiskSpace(reg_dl,&bytes,&sectors,&clusters,&free)) {
reg_ax=sectors;
reg_bx=free;
reg_cx=bytes;
reg_dx=clusters;
} else {
reg_ax=0xffff;
}
}
break;
case 0x37: /* Get/Set Switch char Get/Set Availdev thing */
//TODO Give errors for these functions to see if anyone actually uses this shit-
switch (reg_al) {
case 0:
reg_al=0;reg_dl=0x2f;break; /* always return '/' like dos 5.0+ */
case 1:
reg_al=0;break;
case 2:
reg_al=0;reg_dl=0x2f;break;
case 3:
reg_al=0;break;
};
LOG_DEBUG("DOS:0x37:Call for not supported switchchar");
break;
case 0x38: /* Set Country Code */
LOG_DEBUG("DOS:Setting country code not supported");
CALLBACK_SCF(true);
break;
if (reg_al==0) { /* Get country specidic information */
} else { /* Set country code */
}
break;
case 0x39: /* MKDIR Create directory */
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_MakeDir(name1)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x3a: /* RMDIR Remove directory */
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_RemoveDir(name1)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x3b: /* CHDIR Set current directory */
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_ChangeDir(name1)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x3c: /* CREATE Create of truncate file */
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_CreateFile(name1,reg_cx,&reg_ax)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x3d: /* OPEN Open existing file */
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_OpenFile(name1,reg_al,&reg_ax)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x3e: /* CLOSE Close file */
if (DOS_CloseFile(reg_bx)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x3f: /* READ Read from file or device */
{
Bit16u toread=reg_cx;
if (DOS_ReadFile(reg_bx,dos_copybuf,&toread)) {
MEM_BlockWrite(SegPhys(ds)+reg_dx,dos_copybuf,toread);
reg_ax=toread;
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
}
case 0x40: /* WRITE Write to file or device */
{
Bit16u towrite=reg_cx;
MEM_BlockRead(SegPhys(ds)+reg_dx,dos_copybuf,towrite);
if (DOS_WriteFile(reg_bx,dos_copybuf,&towrite)) {
reg_ax=towrite;
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
};
case 0x41: /* UNLINK Delete file */
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_UnlinkFile(name1)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x42: /* LSEEK Set current file position */
{
Bit32u pos=(reg_cx<<16) + reg_dx;
if (DOS_SeekFile(reg_bx,&pos,reg_al)) {
reg_dx=(Bit16u)(pos >> 16);
reg_ax=(Bit16u)(pos & 0xFFFF);
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
}
case 0x43: /* Get/Set file attributes */
//TODO FIX THIS HACK
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
switch (reg_al)
case 0x00: /* Get */
{
if (DOS_GetFileAttr(name1,&reg_cx)) {
CALLBACK_SCF(false);
} else {
CALLBACK_SCF(true);
reg_ax=dos.errorcode;
}
break;
case 0x01: /* Set */
LOG_DEBUG("DOS:Set File Attributes for %s not supported",name1);
CALLBACK_SCF(false);
break;
default:
E_Exit("DOS:0x43:Illegal subfunction %2X",reg_al);
}
break;
case 0x44: /* IOCTL Functions */
if (DOS_IOCTL(reg_al,reg_bx)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x45: /* DUP Duplicate file handle */
if (DOS_DuplicateEntry(reg_bx,&reg_ax)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x46: /* DUP2,FORCEDUP Force duplicate file handle */
if (DOS_ForceDuplicateEntry(reg_bx,reg_ax)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x47: /* CWD Get current directory */
//TODO Memory
if (DOS_GetCurrentDir(reg_dl,name1)) {
MEM_BlockWrite(SegPhys(ds)+reg_si,name1,strlen(name1)+1);
reg_ax=0x0100;
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x48: /* Allocate memory */
{
Bit16u size=reg_bx;Bit16u seg;
if (DOS_AllocateMemory(&seg,&size)) {
reg_ax=seg;
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
reg_bx=size;
CALLBACK_SCF(true);
}
break;
}
case 0x49: /* Free memory */
if (DOS_FreeMemory(SegValue(es))) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x4a: /* Resize memory block */
{
Bit16u size=reg_bx;
if (DOS_ResizeMemory(SegValue(es),&size)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
reg_bx=size;
CALLBACK_SCF(true);
}
break;
}
case 0x4b: /* EXEC Load and/or execute program */
{
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_Execute(name1,(ParamBlock *)Phys2Host(SegPhys(es)+reg_bx),reg_al)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
}
break;
//TODO Check for use of execution state AL=5
case 0x4c: /* EXIT Terminate with return code */
{
if (DOS_Terminate(false)) {
dos.return_code=reg_al;
dos.return_mode=RETURN_EXIT;
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
}
case 0x4d: /* Get Return code */
reg_al=dos.return_code;
reg_ah=dos.return_mode;
break;
case 0x4e: /* FINDFIRST Find first matching file */
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_FindFirst(name1,reg_cx)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
};
break;
case 0x4f: /* FINDNEXT Find next matching file */
if (DOS_FindNext()) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
};
break;
case 0x50: /* Set current PSP */
dos.psp=reg_bx;
break;
case 0x51: /* Get current PSP */
reg_bx=dos.psp;
break;
case 0x52: { /* Get list of lists */
Bit16u seg;
dosInfoBlock.GetDIBPointer(seg,reg_bx);
SegSet16(es,seg);
LOG_DEBUG("Call is made for list of lists - let's hope for the best");
break; }
//TODO Think hard how shit this is gonna be
//And will any game ever use this :)
case 0x53: /* Translate BIOS parameter block to drive parameter block */
//YEAH RIGHT
case 0x54: /* Get verify flag */
case 0x55: /* Create Child PSP*/
E_Exit("Unhandled Dos 21 call %02X",reg_ah);
break;
case 0x56: /* RENAME Rename file */
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
MEM_StrCopy(SegPhys(es)+reg_di,name2,DOSNAMEBUF);
if (DOS_Rename(name1,name2)) {
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x57: /* Get/Set File's Date and Time */
reg_cx=0;
reg_dx=0;
LOG_DEBUG("DOS:57:Getting/Setting File Date is faked",reg_ah);
break;
case 0x58: /* Get/Set Memory allocation strategy */
LOG_DEBUG("DOS:58:Not Supported Set//Get memory allocation");
break;
case 0x59: /* Get Extended error information */
reg_ax=dos.errorcode;
reg_bh=0; //Unkown error class
reg_bl=1; //Retry retry retry
reg_ch=0; //Unkown error locus
break;
case 0x5a: /* Create temporary file */
{
Bit16u handle;
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_CreateTempFile(name1,&handle)) {
reg_ax=handle;
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
}
break;
case 0x5b: /* Create new file */
{
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
Bit16u handle;
if (DOS_OpenFile(name1,0,&handle)) {
DOS_CloseFile(handle);
DOS_SetError(DOSERR_ACCESS_DENIED);
reg_ax=dos.errorcode;
CALLBACK_SCF(false);
break;
}
if (DOS_CreateFile(name1,reg_cx,&handle)) {
reg_ax=handle;
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
}
case 0x5c: /* FLOCK File region locking */
case 0x5d: /* Network Functions */
case 0x5e: /* More Network Functions */
case 0x5f: /* And Even More Network Functions */
E_Exit("DOS:Unhandled call %02X",reg_ah);
break;
case 0x60: /* Canonicalize filename or path */
MEM_StrCopy(SegPhys(ds)+reg_dx,name1,DOSNAMEBUF);
if (DOS_Canonicalize(name1,name2)) {
MEM_BlockWrite(SegPhys(es)+reg_di,name2,strlen(name2)+1);
CALLBACK_SCF(false);
} else {
reg_ax=dos.errorcode;
CALLBACK_SCF(true);
}
break;
case 0x62: /* Get Current PSP Address */
reg_bx=dos.psp;
break;
case 0x63: /* Weirdo double byte stuff */
reg_al=0xff;
LOG_WARN("DOS:0x63:Doubly byte characters not supported");
break;
case 0x64: /* Set device driver lookahead flag */
E_Exit("Unhandled Dos 21 call %02X",reg_ah);
break;
case 0x65: /* Get extented country information and a lot of other useless shit*/
/* Todo maybe fully support this for now we set it standard for USA */
{
LOG_DEBUG("DOS:65:Extended country information call");
PhysPt data=SegPhys(es)+reg_di;
switch (reg_al) {
case 1:
mem_writeb(data,reg_al);
mem_writew(data+1,4);
mem_writew(data+3,1);
mem_writew(data+5,37);
reg_cx=4;
CALLBACK_SCF(false);
break;
default:
E_Exit("DOS:0x65:Unhandled country information call %2X",reg_al);
};
break;
}
case 0x66: /* Get/Set global code page table */
if (reg_al==1) {
LOG_DEBUG("Getting global code page table");
reg_bx=reg_dx=437;
CALLBACK_SCF(false);
break;
}
LOG_ERROR("DOS:Setting code page table is not supported");
break;
case 0x67: /* Set handle countr */
/* Weird call to increase amount of file handles needs to allocate memory if >20 */
LOG_DEBUG("DOS:67:Set Handle Count not working");
CALLBACK_SCF(false);
break;
case 0x68: /* FFLUSH Commit file */
E_Exit("Unhandled Dos 21 call %02X",reg_ah);
break;
case 0x69: /* Get/Set disk serial number */
{
switch(reg_al) {
case 0x00: /* Get */
LOG_DEBUG("DOS:Get Disk serial number");
CALLBACK_SCF(true);
break;
case 0x01:
LOG_DEBUG("DOS:Set Disk serial number");
default:
E_Exit("DOS:Illegal Get Serial Number call %2X",reg_al);
}
break;
}
case 0x6c: /* Extended Open/Create */
E_Exit("Unhandled Dos 21 call %02X",reg_ah);
break;
case 0x71: /* Unknown probably 4dos detection */
reg_ax=0x7100;
CALLBACK_SCF(true);
LOG_WARN("DOS:Windows long file name support call %2X",reg_al);
break;
case 0xE0:
LOG_DEBUG("DOS:E0:Unhandled, what should this call do?");
break;
default:
E_Exit("DOS:Unhandled call %02X",reg_ah);
break;
};
return CBRET_NONE;
/* That's it now let's get it working */
};
static Bitu DOS_20Handler(void) {
reg_ax=0x4c00;
DOS_21Handler();
return CBRET_NONE;
}
void DOS_Init(void) {
call_20=CALLBACK_Allocate();
CALLBACK_Setup(call_20,DOS_20Handler,CB_IRET);
RealSetVec(0x20,CALLBACK_RealPointer(call_20));
call_21=CALLBACK_Allocate();
CALLBACK_Setup(call_21,DOS_21Handler,CB_IRET);
RealSetVec(0x21,CALLBACK_RealPointer(call_21));
DOS_SetupFiles(); /* Setup system File tables */
DOS_SetupDevices(); /* Setup dos devices */
DOS_SetupMemory(); /* Setup first MCB */
DOS_SetupTables();
DOS_SetupPrograms();
DOS_SetupMisc(); /* Some additional dos interrupts */
DOS_SetDefaultDrive(25);
/* Execute the file that should be */
dos.version.major=5;
dos.version.minor=0;
// DOS_RunProgram(startname);
};
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