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Implemented basic XMS functions. wcb.exe (Win16 disassembler) now 

seems to work fine under Wine.
This commit is contained in:
Ove Kaaven 1998-10-11 12:16:56 +00:00 committed by Alexandre Julliard
parent 7dc3c60658
commit 32486cded4
3 changed files with 118 additions and 0 deletions
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1
msdos/Makefile.in
View File

@ -9,6 +9,7 @@ C_SRCS = \
cdrom.c \
dosmem.c \
dpmi.c \
xms.c \
int10.c \
int11.c \
int12.c \

26
msdos/int2f.c
View File

@ -95,8 +95,34 @@ void WINAPI INT_Int2fHandler( CONTEXT *context )
do_int2f_16( context );
break;
case 0x43:
#if 1
switch (AL_reg(context))
{
case 0x00: /* XMS v2+ installation check */
WARN(int,"XMS is not fully implemented\n");
AL_reg(context) = 0x80;
break;
case 0x10: /* XMS v2+ get driver address */
{
TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL;
GlobalUnlock16( GetCurrentTask() );
#ifdef MZ_SUPPORTED
if (pModule && pModule->lpDosTask)
ES_reg(context) = pModule->lpDosTask->xms_seg;
else
#endif
ES_reg(context) = 0;
BX_reg(context) = 0;
break;
}
default:
INT_BARF( context, 0x2f );
}
#else
FIXME(int,"check for XMS (not supported)\n");
AL_reg(context) = 0x42; /* != 0x80 */
#endif
break;
case 0x45:

91
msdos/xms.c Normal file
View File

@ -0,0 +1,91 @@
/*
* XMS v2+ emulation
*
* Copyright 1998 Ove Kåven
*
* This XMS emulation is hooked through the DPMI interrupt.
*/
#include <unistd.h>
#include <string.h>
#include "windows.h"
#include "module.h"
#include "miscemu.h"
#include "toolhelp.h"
#include "debug.h"
#include "selectors.h"
typedef struct {
WORD Handle;
DWORD Offset;
} WINE_PACKED MOVEOFS;
typedef struct {
DWORD Length;
MOVEOFS Source;
MOVEOFS Dest;
} WINE_PACKED MOVESTRUCT;
static BYTE * XMS_Offset( MOVEOFS *ofs )
{
if (ofs->Handle) return (BYTE*)GlobalLock16(ofs->Handle)+ofs->Offset;
else return (BYTE*)DOSMEM_MapRealToLinear(ofs->Offset);
}
/**********************************************************************
* XMS_Handler
*/
void WINAPI XMS_Handler( CONTEXT *context )
{
switch(AH_reg(context))
{
case 0x00: /* Get XMS version number */
TRACE(int31, "get XMS version number\n");
AX_reg(context) = 0x0200; /* 2.0 */
BX_reg(context) = 0x0000; /* internal revision */
DX_reg(context) = 0x0001; /* HMA exists */
break;
case 0x08: /* Query Free Extended Memory */
{
MEMMANINFO mmi;
TRACE(int31, "query free extended memory\n");
mmi.dwSize = sizeof(mmi);
MemManInfo(&mmi);
AX_reg(context) = mmi.dwFreePages>>10;
DX_reg(context) = mmi.dwLargestFreeBlock>>10;
break;
}
case 0x09: /* Allocate Extended Memory Block */
TRACE(int31, "allocate extended memory block (%dK)\n",
DX_reg(context));
DX_reg(context) = GlobalAlloc16(GMEM_MOVEABLE,
(DWORD)DX_reg(context)<<10);
AX_reg(context) = DX_reg(context) ? 1 : 0;
if (!DX_reg(context)) BL_reg(context) = 0xA0; /* out of memory */
break;
case 0x0a: /* Free Extended Memory Block */
TRACE(int31, "free extended memory block %04x\n",DX_reg(context));
GlobalFree16(DX_reg(context));
break;
case 0x0b: /* Move Extended Memory Block */
{
MOVESTRUCT*move=CTX_SEG_OFF_TO_LIN(context,
DS_reg(context),SI_reg(context));
BYTE*src,*dst;
TRACE(int31, "move extended memory block\n");
src=XMS_Offset(&move->Source);
dst=XMS_Offset(&move->Dest);
memcpy(dst,src,move->Length);
if (move->Source.Handle) GlobalUnlock16(move->Source.Handle);
if (move->Dest.Handle) GlobalUnlock16(move->Dest.Handle);
break;
}
default:
INT_BARF( context, 0x31 );
AX_reg(context) = 0x0000; /* failure */
BL_reg(context) = 0x80; /* function not implemented */
break;
}
}