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add sft-returning dos function (fixes file/integrity checking library of MadTV2 and Dunkle Schatten 2)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3046
This commit is contained in:
Sebastian Strohhäcker 2007-11-07 22:08:03 +00:00
parent 5cdc1cd683
commit 6d7dd9f3ae
3 changed files with 91 additions and 12 deletions
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12
include/dos_inc.h
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: dos_inc.h,v 1.70 2007-07-20 18:53:52 qbix79 Exp $ */
/* $Id: dos_inc.h,v 1.71 2007-11-07 22:08:03 c2woody Exp $ */
#ifndef DOSBOX_DOS_INC_H
#define DOSBOX_DOS_INC_H
@ -78,12 +78,12 @@ enum { RETURN_EXIT=0,RETURN_CTRLC=1,RETURN_ABORT=2,RETURN_TSR=3};
#define DOS_INFOBLOCK_SEG 0x80
#define DOS_CDS_SEG 0x90
#define DOS_CONSTRING_SEG 0xa0
#define DOS_CONDRV_SEG 0xa4
#define DOS_SDA_SEG 0xb2
#define DOS_CDS_SEG 0xa8
#define DOS_CONSTRING_SEG 0xb8
#define DOS_CONDRV_SEG 0xbc
#define DOS_SDA_SEG 0xca
#define DOS_SDA_OFS 0
#define DOS_MEM_START 0x102 //First Segment that DOS can use
#define DOS_MEM_START 0x11a //First Segment that DOS can use
#define DOS_PRIVATE_SEGMENT 0xc800
#define DOS_PRIVATE_SEGMENT_END 0xd000

8
src/dos/dos_classes.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: dos_classes.cpp,v 1.52 2007-06-13 07:25:14 qbix79 Exp $ */
/* $Id: dos_classes.cpp,v 1.53 2007-11-07 22:08:03 c2woody Exp $ */
#include <string.h>
#include <stdlib.h>
@ -117,10 +117,10 @@ void DOS_InfoBlock::SetLocation(Bit16u segment) {
/* Create a fake SFT, so programs think there are 100 file handles */
Bit16u sftOffset=offsetof(sDIB,firstFileTable)+0xa2;
sSave(sDIB,firstFileTable,RealMake(segment,sftOffset));
real_writed(segment,sftOffset+0x00,RealMake(segment+0x11,0)); //Next File Table
real_writed(segment,sftOffset+0x00,RealMake(segment+0x26,0)); //Next File Table
real_writew(segment,sftOffset+0x04,100); //File Table supports 100 files
real_writed(segment+0x11,0x00,0xffffffff); //Last File Table
real_writew(segment+0x11,0x04,100); //File Table supports 100 files
real_writed(segment+0x26,0x00,0xffffffff); //Last File Table
real_writew(segment+0x26,0x04,100); //File Table supports 100 files
}
void DOS_InfoBlock::SetFirstMCB(Bit16u _firstmcb) {

83
src/dos/dos_misc.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: dos_misc.cpp,v 1.17 2007-01-08 19:45:39 qbix79 Exp $ */
/* $Id: dos_misc.cpp,v 1.18 2007-11-07 22:08:03 c2woody Exp $ */
#include "dosbox.h"
#include "callback.h"
@ -61,10 +61,89 @@ static Bitu INT2A_Handler(void) {
static bool DOS_MultiplexFunctions(void) {
switch (reg_ax) {
case 0x1216: /* GET ADDRESS OF SYSTEM FILE TABLE ENTRY */
/* Should do a lot more. Let's see if we can get away with it */
// reg_bx is a system file table entry, should coincide with
// the file handle so just use that
LOG(LOG_DOSMISC,LOG_ERROR)("Some BAD filetable call used bx=%X",reg_bx);
if(reg_bx <= DOS_FILES) CALLBACK_SCF(false);
else CALLBACK_SCF(true);
if (reg_bx<16) {
RealPt sftrealpt=mem_readd(Real2Phys(dos_infoblock.GetPointer())+4);
PhysPt sftptr=Real2Phys(sftrealpt);
Bitu sftofs=0x06+reg_bx*0x3b;
if (Files[reg_bx]) mem_writeb(sftptr+sftofs,Files[reg_bx]->refCtr);
else mem_writeb(sftptr+sftofs,0);
if (!Files[reg_bx]) return true;
Bit32u handle=RealHandle(reg_bx);
if (handle>=DOS_FILES) {
mem_writew(sftptr+sftofs+0x02,0x02); // file open mode
mem_writeb(sftptr+sftofs+0x04,0x00); // file attribute
mem_writew(sftptr+sftofs+0x05,Files[reg_bx]->GetInformation()); // device info word
mem_writed(sftptr+sftofs+0x07,0); // device driver header
mem_writew(sftptr+sftofs+0x0d,0); // packed time
mem_writew(sftptr+sftofs+0x0f,0); // packed date
mem_writew(sftptr+sftofs+0x11,0); // size
mem_writew(sftptr+sftofs+0x15,0); // current position
} else {
Bit8u drive=Files[reg_bx]->GetDrive();
mem_writew(sftptr+sftofs+0x02,Files[reg_bx]->flags&3); // file open mode
mem_writeb(sftptr+sftofs+0x04,(Bit8u)(Files[reg_bx]->attr)); // file attribute
mem_writew(sftptr+sftofs+0x05,0x40|drive); // device info word
mem_writed(sftptr+sftofs+0x07,RealMake(dos.tables.dpb,drive)); // dpb of the drive
mem_writew(sftptr+sftofs+0x0d,Files[reg_bx]->time); // packed file time
mem_writew(sftptr+sftofs+0x0f,Files[reg_bx]->date); // packed file date
Bit32u curpos=0;
Files[reg_bx]->Seek(&curpos,DOS_SEEK_CUR);
Bit32u endpos=0;
Files[reg_bx]->Seek(&endpos,DOS_SEEK_END);
mem_writed(sftptr+sftofs+0x11,endpos); // size
mem_writed(sftptr+sftofs+0x15,curpos); // current position
Files[reg_bx]->Seek(&curpos,DOS_SEEK_SET);
}
// fill in filename in fcb style
// (space-padded name (8 chars)+space-padded extension (3 chars))
const char* filename=(const char*)Files[reg_bx]->GetName();
if (strrchr(filename,'\\')) filename=strrchr(filename,'\\')+1;
if (strrchr(filename,'/')) filename=strrchr(filename,'/')+1;
if (!filename) return true;
const char* dotpos=strrchr(filename,'.');
if (dotpos) {
dotpos++;
size_t nlen=strlen(filename);
size_t extlen=strlen(dotpos);
Bits nmelen=(Bits)nlen-(Bits)extlen;
nmelen--;
if (nmelen<0) return true;
nlen-=(extlen+1);
if (nlen>8) nlen=8;
for (Bitu i=0; i<nlen; i++)
mem_writeb(sftptr+sftofs+0x20+i,filename[i]);
for (Bitu i=nlen; i<8; i++)
mem_writeb(sftptr+sftofs+0x20+i,' ');
if (extlen>3) extlen=3;
for (Bitu i=0; i<extlen; i++)
mem_writeb(sftptr+sftofs+0x28+i,dotpos[i]);
for (Bitu i=extlen; i<3; i++)
mem_writeb(sftptr+sftofs+0x28+i,' ');
} else {
size_t nlen=strlen(filename);
if (nlen>8) nlen=8;
for (Bitu i=0; i<nlen; i++)
mem_writeb(sftptr+sftofs+0x20+i,filename[i]);
for (Bitu i=nlen; i<11; i++)
mem_writeb(sftptr+sftofs+0x20+i,' ');
}
SegSet16(es,RealSeg(sftrealpt));
reg_di=RealOff(sftrealpt+sftofs);
reg_ax=0xc000;
}
return true;
case 0x1607:
if (reg_bx == 0x15) {