672 lines
22 KiB
C
672 lines
22 KiB
C
/*
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* DPMI 0.9 emulation
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*
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* Copyright 1995 Alexandre Julliard
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*/
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#include <unistd.h>
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#include <string.h>
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#include "windows.h"
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#include "heap.h"
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#include "ldt.h"
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#include "module.h"
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#include "miscemu.h"
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#include "drive.h"
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#include "msdos.h"
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#include "toolhelp.h"
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#include "debug.h"
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#include "selectors.h"
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#include "thread.h"
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#include "stackframe.h"
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#include "callback.h"
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#define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
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void CreateBPB(int drive, BYTE *data, BOOL16 limited); /* defined in int21.c */
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/* Structure for real-mode callbacks */
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typedef struct
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{
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DWORD edi;
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DWORD esi;
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DWORD ebp;
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DWORD reserved;
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DWORD ebx;
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DWORD edx;
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DWORD ecx;
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DWORD eax;
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WORD fl;
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WORD es;
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WORD ds;
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WORD fs;
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WORD gs;
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WORD ip;
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WORD cs;
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WORD sp;
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WORD ss;
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} REALMODECALL;
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typedef struct tagRMCB {
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DWORD address;
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struct tagRMCB *next;
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} RMCB;
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static RMCB *FirstRMCB = NULL;
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/**********************************************************************
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* INT_GetRealModeContext
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*/
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static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT *context )
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{
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EAX_reg(context) = call->eax;
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EBX_reg(context) = call->ebx;
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ECX_reg(context) = call->ecx;
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EDX_reg(context) = call->edx;
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ESI_reg(context) = call->esi;
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EDI_reg(context) = call->edi;
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EBP_reg(context) = call->ebp;
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EFL_reg(context) = call->fl;
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EIP_reg(context) = call->ip;
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ESP_reg(context) = call->sp;
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CS_reg(context) = call->cs;
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DS_reg(context) = call->ds;
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ES_reg(context) = call->es;
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FS_reg(context) = call->fs;
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GS_reg(context) = call->gs;
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}
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/**********************************************************************
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* INT_SetRealModeContext
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*/
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static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT *context )
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{
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call->eax = EAX_reg(context);
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call->ebx = EBX_reg(context);
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call->ecx = ECX_reg(context);
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call->edx = EDX_reg(context);
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call->esi = ESI_reg(context);
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call->edi = EDI_reg(context);
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call->ebp = EBP_reg(context);
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call->fl = FL_reg(context);
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call->ip = IP_reg(context);
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call->sp = SP_reg(context);
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call->cs = CS_reg(context);
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call->ds = DS_reg(context);
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call->es = ES_reg(context);
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call->fs = FS_reg(context);
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call->gs = GS_reg(context);
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}
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/**********************************************************************
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* INT_DoRealModeInt
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*/
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static void INT_DoRealModeInt( CONTEXT *context )
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{
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CONTEXT realmode_ctx;
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REALMODECALL *call = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context),
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DI_reg(context) );
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INT_GetRealModeContext( call, &realmode_ctx );
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RESET_CFLAG(context);
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switch (BL_reg(context))
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{
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case 0x2f: /* int2f */
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switch (AH_reg(&realmode_ctx))
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{
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case 0x15:
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/* MSCDEX hook */
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do_mscdex( &realmode_ctx );
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break;
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default:
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SET_CFLAG(context);
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break;
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}
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break;
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case 0x21: /* int21 */
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switch (AH_reg(&realmode_ctx))
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{
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case 0x52:
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ES_reg(&realmode_ctx) = 0;
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EBX_reg(&realmode_ctx) = 0;
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break;
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case 0x65:
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switch (AL_reg(&realmode_ctx))
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{
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case 0x06:
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{/* get collate table */
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/* ES:DI is a REALMODE pointer to 5 byte dosmem
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* we fill that with 0x6, realmode pointer to collateTB
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*/
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char *table = DOSMEM_MapRealToLinear(
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MAKELONG(EDI_reg(&realmode_ctx),ES_reg(&realmode_ctx)));
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*(BYTE*)table = 0x06;
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*(DWORD*)(table+1) = DOSMEM_CollateTable;
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CX_reg(&realmode_ctx) = 258;/*FIXME: size of table?*/
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break;
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}
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default:
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SET_CFLAG(context);
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break;
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}
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break;
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case 0x44:
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switch (AL_reg(&realmode_ctx))
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{
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case 0x0D:
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{/* generic block device request */
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BYTE *dataptr = DOSMEM_MapRealToLinear(
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MAKELONG(EDX_reg(&realmode_ctx),DS_reg(&realmode_ctx)));
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int drive = DOS_GET_DRIVE(BL_reg(&realmode_ctx));
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if (CH_reg(&realmode_ctx) != 0x08)
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{
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SET_CFLAG(context);
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break;
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}
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switch (CL_reg(&realmode_ctx))
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{
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case 0x66:
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{
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char label[12],fsname[9],path[4];
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DWORD serial;
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strcpy(path,"x:\\");path[0]=drive+'A';
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GetVolumeInformation32A(path,label,12,&serial,NULL,NULL,fsname,9);
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*(WORD*)dataptr = 0;
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memcpy(dataptr+2,&serial,4);
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memcpy(dataptr+6,label ,11);
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memcpy(dataptr+17,fsname,8);
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break;
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}
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case 0x60: /* get device parameters */
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/* used by defrag.exe of win95 */
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memset(dataptr, 0, 0x26);
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dataptr[0] = 0x04;
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dataptr[6] = 0; /* media type */
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if (drive > 1)
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{
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dataptr[1] = 0x05; /* fixed disk */
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setword(&dataptr[2], 0x01); /* non removable */
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setword(&dataptr[4], 0x300); /* # of cylinders */
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}
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else
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{
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dataptr[1] = 0x07; /* block dev, floppy */
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setword(&dataptr[2], 0x02); /* removable */
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setword(&dataptr[4], 80); /* # of cylinders */
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}
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CreateBPB(drive, &dataptr[7], FALSE);
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break;
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default:
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SET_CFLAG(context);
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break;
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}
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}
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break;
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default:
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SET_CFLAG(context);
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break;
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}
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break;
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default:
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SET_CFLAG(context);
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break;
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}
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break;
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default:
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SET_CFLAG(context);
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break;
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}
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if (EFL_reg(context)&1) {
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FIXME(int31,"%02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
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BL_reg(context), EAX_reg(&realmode_ctx), EBX_reg(&realmode_ctx),
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ECX_reg(&realmode_ctx), EDX_reg(&realmode_ctx));
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FIXME(int31," ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n",
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ESI_reg(&realmode_ctx), EDI_reg(&realmode_ctx),
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DS_reg(&realmode_ctx), ES_reg(&realmode_ctx) );
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}
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INT_SetRealModeContext( call, &realmode_ctx );
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}
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static void CallRMProcFar( CONTEXT *context )
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{
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REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
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CONTEXT context16;
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THDB *thdb = THREAD_Current();
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WORD argsize, sel;
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LPVOID addr;
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SEGPTR seg_addr;
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TRACE(int31, "RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
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p->eax, p->ebx, p->ecx, p->edx);
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TRACE(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments\n",
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p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context) );
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if (!(p->cs) && !(p->ip)) { /* remove this check
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if Int21/6501 case map function
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has been implemented */
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SET_CFLAG(context);
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return;
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}
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INT_GetRealModeContext(p, &context16);
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addr = DOSMEM_MapRealToLinear(MAKELONG(p->ip, p->cs));
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sel = SELECTOR_AllocBlock( addr, 0x10000, SEGMENT_CODE, FALSE, FALSE );
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seg_addr = PTR_SEG_OFF_TO_SEGPTR( sel, 0 );
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CS_reg(&context16) = HIWORD(seg_addr);
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IP_reg(&context16) = LOWORD(seg_addr);
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EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
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+ (WORD)&((STACK16FRAME*)0)->bp;
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argsize = CX_reg(context)*sizeof(WORD);
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memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
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(LPBYTE)PTR_SEG_OFF_TO_LIN(SS_reg(context), SP_reg(context))+6, argsize );
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Callbacks->CallRegisterShortProc(&context16, argsize);
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UnMapLS(seg_addr);
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INT_SetRealModeContext(p, &context16);
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}
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void WINAPI RMCallbackProc( FARPROC16 pmProc, REALMODECALL *rmc )
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{
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CONTEXT ctx;
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INT_GetRealModeContext(rmc, &ctx);
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Callbacks->CallRegisterShortProc(&ctx, 0);
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}
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static void AllocRMCB( CONTEXT *context )
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{
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RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB));
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REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
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UINT16 uParagraph;
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FIXME(int31, "EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx);
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FIXME(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip);
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FIXME(int31, " Function to call: %04x:%04x\n",
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(WORD)DS_reg(context), SI_reg(context) );
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if (NewRMCB)
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{
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LPVOID RMCBmem = DOSMEM_GetBlock(20, &uParagraph);
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LPBYTE p = RMCBmem;
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*p++ = 0x68; /* pushl */
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*(FARPROC16 *)p =
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PTR_SEG_OFF_TO_LIN(ES_reg(context), SI_reg(context)); /* pmode proc to call */
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p+=4;
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*p++ = 0x68; /* pushl */
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*(LPVOID *)p =
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PTR_SEG_OFF_TO_LIN(ES_reg(context), DI_reg(context));
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p+=4;
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*p++ = 0x9a; /* lcall */
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*(FARPROC16 *)p = (FARPROC16)RMCallbackProc; /* FIXME ? */
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p+=4;
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GET_CS(*(WORD *)p);
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p+=2;
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*p++=0xc3; /* retf */
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NewRMCB->address = MAKELONG(0, uParagraph);
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NewRMCB->next = FirstRMCB;
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FirstRMCB = NewRMCB;
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CX_reg(context) = uParagraph;
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DX_reg(context) = 0;
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}
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else
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{
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AX_reg(context) = 0x8015; /* callback unavailable */
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SET_CFLAG(context);
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}
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}
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static void FreeRMCB( CONTEXT *context )
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{
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RMCB *CurrRMCB = FirstRMCB;
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RMCB *PrevRMCB = NULL;
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FIXME(int31, "callback address: %04x:%04x\n",
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CX_reg(context), DX_reg(context));
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while (CurrRMCB && (CurrRMCB->address != MAKELONG(DX_reg(context), CX_reg(context))))
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{
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PrevRMCB = CurrRMCB;
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CurrRMCB = CurrRMCB->next;
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}
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if (CurrRMCB)
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{
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if (PrevRMCB)
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PrevRMCB->next = CurrRMCB->next;
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else
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FirstRMCB = CurrRMCB->next;
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DOSMEM_FreeBlock(DOSMEM_MapRealToLinear(CurrRMCB->address));
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HeapFree(GetProcessHeap(), 0, CurrRMCB);
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}
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else
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{
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AX_reg(context) = 0x8024; /* invalid callback address */
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SET_CFLAG(context);
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}
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}
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/**********************************************************************
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* INT_Int31Handler
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*
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* Handler for int 31h (DPMI).
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*/
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void WINAPI INT_Int31Handler( CONTEXT *context )
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{
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DWORD dw;
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BYTE *ptr;
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RESET_CFLAG(context);
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switch(AX_reg(context))
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{
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case 0x0000: /* Allocate LDT descriptors */
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TRACE(int31,"allocate LDT descriptors (%d)\n",CX_reg(context));
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if (!(AX_reg(context) = AllocSelectorArray( CX_reg(context) )))
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{
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TRACE(int31,"failed\n");
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AX_reg(context) = 0x8011; /* descriptor unavailable */
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SET_CFLAG(context);
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}
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TRACE(int31,"success, array starts at 0x%04x\n",AX_reg(context));
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break;
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case 0x0001: /* Free LDT descriptor */
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TRACE(int31,"free LDT descriptor (0x%04x)\n",BX_reg(context));
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if (FreeSelector( BX_reg(context) ))
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{
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AX_reg(context) = 0x8022; /* invalid selector */
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SET_CFLAG(context);
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}
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else
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{
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/* If a segment register contains the selector being freed, */
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/* set it to zero. */
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if (!((DS_reg(context)^BX_reg(context)) & ~3)) DS_reg(context) = 0;
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if (!((ES_reg(context)^BX_reg(context)) & ~3)) ES_reg(context) = 0;
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if (!((FS_reg(context)^BX_reg(context)) & ~3)) FS_reg(context) = 0;
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if (!((GS_reg(context)^BX_reg(context)) & ~3)) GS_reg(context) = 0;
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}
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break;
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case 0x0002: /* Real mode segment to descriptor */
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TRACE(int31,"real mode segment to descriptor (0x%04x)\n",BX_reg(context));
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{
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WORD entryPoint = 0; /* KERNEL entry point for descriptor */
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switch(BX_reg(context))
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{
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case 0x0000: entryPoint = 183; break; /* __0000H */
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case 0x0040: entryPoint = 193; break; /* __0040H */
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case 0xa000: entryPoint = 174; break; /* __A000H */
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case 0xb000: entryPoint = 181; break; /* __B000H */
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case 0xb800: entryPoint = 182; break; /* __B800H */
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case 0xc000: entryPoint = 195; break; /* __C000H */
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case 0xd000: entryPoint = 179; break; /* __D000H */
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case 0xe000: entryPoint = 190; break; /* __E000H */
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case 0xf000: entryPoint = 194; break; /* __F000H */
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default:
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AX_reg(context) = DOSMEM_AllocSelector(BX_reg(context));
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break;
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}
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if (entryPoint)
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AX_reg(context) = LOWORD(NE_GetEntryPoint(
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GetModuleHandle16( "KERNEL" ),
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entryPoint ));
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}
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break;
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case 0x0003: /* Get next selector increment */
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TRACE(int31,"get selector increment (__AHINCR)\n");
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AX_reg(context) = __AHINCR;
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break;
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case 0x0004: /* Lock selector (not supported) */
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FIXME(int31,"lock selector not supported\n");
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AX_reg(context) = 0; /* FIXME: is this a correct return value? */
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break;
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case 0x0005: /* Unlock selector (not supported) */
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FIXME(int31,"unlock selector not supported\n");
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AX_reg(context) = 0; /* FIXME: is this a correct return value? */
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break;
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case 0x0006: /* Get selector base address */
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TRACE(int31,"get selector base address (0x%04x)\n",BX_reg(context));
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if (!(dw = GetSelectorBase( BX_reg(context) )))
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{
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AX_reg(context) = 0x8022; /* invalid selector */
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SET_CFLAG(context);
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}
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else
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{
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CX_reg(context) = HIWORD(dw);
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DX_reg(context) = LOWORD(dw);
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}
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break;
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case 0x0007: /* Set selector base address */
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TRACE(int31,"set selector base address (0x%04x,0x%08lx)\n",BX_reg(context),MAKELONG(DX_reg(context),CX_reg(context)));
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SetSelectorBase( BX_reg(context),
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MAKELONG( DX_reg(context), CX_reg(context) ) );
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break;
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case 0x0008: /* Set selector limit */
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TRACE(int31,"set selector limit (0x%04x,0x%08lx)\n",BX_reg(context),MAKELONG(DX_reg(context),CX_reg(context)));
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SetSelectorLimit( BX_reg(context),
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MAKELONG( DX_reg(context), CX_reg(context) ) );
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break;
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case 0x0009: /* Set selector access rights */
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TRACE(int31,"set selector access rights(0x%04x,0x%04x)\n",BX_reg(context),CX_reg(context));
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SelectorAccessRights( BX_reg(context), 1, CX_reg(context) );
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break;
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case 0x000a: /* Allocate selector alias */
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TRACE(int31,"allocate selector alias (0x%04x)\n",BX_reg(context));
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if (!(AX_reg(context) = AllocCStoDSAlias( BX_reg(context) )))
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{
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AX_reg(context) = 0x8011; /* descriptor unavailable */
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SET_CFLAG(context);
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}
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break;
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case 0x000b: /* Get descriptor */
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TRACE(int31,"get descriptor (0x%04x)\n",BX_reg(context));
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{
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ldt_entry entry;
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LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
|
|
/* FIXME: should use ES:EDI for 32-bit clients */
|
|
LDT_EntryToBytes( PTR_SEG_OFF_TO_LIN( ES_reg(context),
|
|
DI_reg(context) ), &entry );
|
|
}
|
|
break;
|
|
|
|
case 0x000c: /* Set descriptor */
|
|
TRACE(int31,"set descriptor (0x%04x)\n",BX_reg(context));
|
|
{
|
|
ldt_entry entry;
|
|
LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES_reg(context),
|
|
DI_reg(context) ), &entry );
|
|
LDT_SetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
|
|
}
|
|
break;
|
|
|
|
case 0x000d: /* Allocate specific LDT descriptor */
|
|
FIXME(int31,"allocate descriptor (0x%04x), stub!\n",BX_reg(context));
|
|
AX_reg(context) = 0x8011; /* descriptor unavailable */
|
|
SET_CFLAG(context);
|
|
break;
|
|
case 0x0200: /* get real mode interrupt vector */
|
|
FIXME(int31,"get realmode interupt vector(0x%02x) unimplemented.\n",
|
|
BL_reg(context));
|
|
SET_CFLAG(context);
|
|
break;
|
|
case 0x0201: /* set real mode interrupt vector */
|
|
FIXME(int31, "set realmode interupt vector(0x%02x,0x%04x:0x%04x) unimplemented\n", BL_reg(context),CX_reg(context),DX_reg(context));
|
|
SET_CFLAG(context);
|
|
break;
|
|
case 0x0204: /* Get protected mode interrupt vector */
|
|
TRACE(int31,"get protected mode interrupt handler (0x%02x), stub!\n",BL_reg(context));
|
|
dw = (DWORD)INT_GetHandler( BL_reg(context) );
|
|
CX_reg(context) = HIWORD(dw);
|
|
DX_reg(context) = LOWORD(dw);
|
|
break;
|
|
|
|
case 0x0205: /* Set protected mode interrupt vector */
|
|
TRACE(int31,"set protected mode interrupt handler (0x%02x,0x%08lx), stub!\n",BL_reg(context),PTR_SEG_OFF_TO_LIN(CX_reg(context),DX_reg(context)));
|
|
INT_SetHandler( BL_reg(context),
|
|
(FARPROC16)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context),
|
|
DX_reg(context) ));
|
|
break;
|
|
|
|
case 0x0300: /* Simulate real mode interrupt */
|
|
INT_DoRealModeInt( context );
|
|
break;
|
|
|
|
case 0x0301: /* Call real mode procedure with far return */
|
|
CallRMProcFar( context );
|
|
break;
|
|
|
|
case 0x0302: /* Call real mode procedure with interrupt return */
|
|
{
|
|
REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
|
|
FIXME(int31, "RealModeCallIret: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx);
|
|
FIXME(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip );
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
case 0x0303: /* Allocate Real Mode Callback Address */
|
|
AllocRMCB( context );
|
|
break;
|
|
|
|
case 0x0304: /* Free Real Mode Callback Address */
|
|
FreeRMCB( context );
|
|
break;
|
|
|
|
case 0x0400: /* Get DPMI version */
|
|
TRACE(int31,"get DPMI version\n");
|
|
{
|
|
SYSTEM_INFO si;
|
|
|
|
GetSystemInfo(&si);
|
|
AX_reg(context) = 0x005a; /* DPMI version 0.90 */
|
|
BX_reg(context) = 0x0005; /* Flags: 32-bit, virtual memory */
|
|
CL_reg(context) = si.wProcessorLevel;
|
|
DX_reg(context) = 0x0102; /* Master/slave interrupt controller base*/
|
|
break;
|
|
}
|
|
case 0x0500: /* Get free memory information */
|
|
TRACE(int31,"get free memory information\n");
|
|
{
|
|
MEMMANINFO mmi;
|
|
|
|
mmi.dwSize = sizeof(mmi);
|
|
MemManInfo(&mmi);
|
|
ptr = (BYTE *)PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context));
|
|
/* the layout is just the same as MEMMANINFO, but without
|
|
* the dwSize entry.
|
|
*/
|
|
memcpy(ptr,((char*)&mmi)+4,sizeof(mmi)-4);
|
|
break;
|
|
}
|
|
case 0x0501: /* Allocate memory block */
|
|
TRACE(int31,"allocate memory block (%ld)\n",MAKELONG(CX_reg(context),BX_reg(context)));
|
|
if (!(ptr = (BYTE *)VirtualAlloc(NULL, MAKELONG(CX_reg(context), BX_reg(context)), MEM_COMMIT, PAGE_EXECUTE_READWRITE)))
|
|
{
|
|
AX_reg(context) = 0x8012; /* linear memory not available */
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
BX_reg(context) = SI_reg(context) = HIWORD(ptr);
|
|
CX_reg(context) = DI_reg(context) = LOWORD(ptr);
|
|
}
|
|
break;
|
|
|
|
case 0x0502: /* Free memory block */
|
|
TRACE(int31,"free memory block (0x%08lx)\n",MAKELONG(DI_reg(context),SI_reg(context)));
|
|
VirtualFree((void *)MAKELONG(DI_reg(context), SI_reg(context)), 0, MEM_RELEASE);
|
|
break;
|
|
|
|
case 0x0503: /* Resize memory block */
|
|
TRACE(int31,"resize memory block (0x%08lx,%ld)\n",MAKELONG(DI_reg(context),SI_reg(context)),MAKELONG(CX_reg(context),BX_reg(context)));
|
|
if (!(ptr = (BYTE *)HeapReAlloc( GetProcessHeap(), 0,
|
|
(void *)MAKELONG(DI_reg(context),SI_reg(context)),
|
|
MAKELONG(CX_reg(context),BX_reg(context)))))
|
|
{
|
|
AX_reg(context) = 0x8012; /* linear memory not available */
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
BX_reg(context) = SI_reg(context) = HIWORD(ptr);
|
|
CX_reg(context) = DI_reg(context) = LOWORD(ptr);
|
|
}
|
|
break;
|
|
|
|
case 0x0600: /* Lock linear region */
|
|
FIXME(int31,"lock linear region unimplemented\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0601: /* Unlock linear region */
|
|
FIXME(int31,"unlock linear region unimplemented\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0602: /* Unlock real-mode region */
|
|
FIXME(int31,"unlock realmode region unimplemented\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0603: /* Lock real-mode region */
|
|
FIXME(int31,"lock realmode region unimplemented\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0604: /* Get page size */
|
|
TRACE(int31,"get pagesize\n");
|
|
BX_reg(context) = 0;
|
|
CX_reg(context) = VIRTUAL_GetPageSize();
|
|
break;
|
|
|
|
case 0x0702: /* Mark page as demand-paging candidate */
|
|
FIXME(int31,"mark page as demand-paging candidate\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0703: /* Discard page contents */
|
|
FIXME(int31,"discard page contents\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0800: /* Physical address mapping */
|
|
FIXME(int31,"map real to linear (0x%08lx)\n",MAKELONG(CX_reg(context),BX_reg(context)));
|
|
if(!(ptr=DOSMEM_MapRealToLinear(MAKELONG(CX_reg(context),BX_reg(context)))))
|
|
{
|
|
AX_reg(context) = 0x8021;
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
BX_reg(context) = HIWORD(ptr);
|
|
CX_reg(context) = LOWORD(ptr);
|
|
RESET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
INT_BARF( context, 0x31 );
|
|
AX_reg(context) = 0x8001; /* unsupported function */
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
}
|