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//
// Fake video rom support
//
// This file provides interrim support for video rom bios services.
// It is only intended for use until Insignia produces proper rom support
// for NTVDM
//
// Note: portions of this code were lifted from the following source.
/* x86 v1.0
*
* XBIOSVID.C
* Guest ROM BIOS video emulation
*
* History
* Created 20-Oct-90 by Jeff Parsons
*
* COPYRIGHT NOTICE
* This source file may not be distributed, modified or incorporated into
* another product without prior approval from the author, Jeff Parsons.
* This file may be copied to designated servers and machines authorized to
* access those servers, but that does not imply any form of approval.
*/
#include <windows.h>
#include <stdio.h>
#include <string.h>
#include <conio.h>
#include "softpc.h"
#include "bop.h"
#include "xbios.h"
#include "xbiosvid.h"
#include "xwincon.h"
#include "fun.h"
#include "cmdsvc.h"
static BYTE ServiceRoutine[] = { 0xC4, 0xC4, BOP_VIDEO, 0x50, 0x55, 0x8B,
0xEC, 0x9C, 0x58, 0x89, 0x46, 0x08, 0x5d, 0x58, 0xCF };
#define SERVICE_LENGTH sizeof(ServiceRoutine)
extern HANDLE OutputHandle;
extern HANDLE InputHandle;
/* BiosVidInit - Initialize ROM BIOS video support
*
* ENTRY
* argc - # of command-line options
* argv - pointer to first option pointer
* ServicAddress - pointer to linear address to put interrupt service
* routine at
*
* EXIT
* TRUE if successful, FALSE if not
*/
BOOL BiosVidInit(int argc, char *argv[], PVOID *ServiceAddress)
{
USHORT usEquip;
static BYTE abVidInit[] = {VIDMODE_MONO, // VIDDATA_CRT_MODE
0x80, 0, // VIDDATA_CRT_COLS
00, 0x10, // VIDDATA_CRT_LEN
0, 0, // VIDDATA_CRT_START
0,0,0,0,0,0,0,0, // VIDDATA_CURSOR_POSN
0,0,0,0,0,0,0,0, //
7, 6, // VIDDATA_CURSOR_MODE
0, // VIDDATA_ACTIVE_PAGE
0xD4, 0x03, // VIDDATA_ADDR_6845
0, // VIDDATA_CRT_MODE_SET
0, // VIDDATA_CRT_PALETTE
};
PVOID Address;
argv, argc;
memcpy(*ServiceAddress, ServiceRoutine, SERVICE_LENGTH);
Address = (PVOID)(BIOSINT_VID * 4);
*((PWORD)Address) = RMOFF(*ServiceAddress);
*(((PWORD)Address) + 1) = RMSEG(*ServiceAddress);
(PCHAR)*ServiceAddress += SERVICE_LENGTH;
usEquip = *(PWORD)RMSEGOFFTOLIN(BIOSDATA_SEG, BIOSDATA_EQUIP_FLAG);
usEquip |= BIOSEQUIP_MONOVIDEO;
*(PWORD)RMSEGOFFTOLIN(BIOSDATA_SEG, BIOSDATA_EQUIP_FLAG) = usEquip;
// Initialize ROM BIOS video data to defaults
Address = RMSEGOFFTOLIN(BIOSDATA_SEG, VIDDATA_CRT_MODE);
memcpy(Address, abVidInit, sizeof(abVidInit));
#if 0
#ifdef WIN
clearconsole(hwndGuest);
#endif
#endif
return TRUE;
}
/* BiosVid - Emulate ROM BIOS video functions
*
* ENTRY
* None (x86 registers contain parameters)
*
* EXIT
* None (x86 registers/memory updated appropriately)
*
* This function receives control on INT 10h, routes control to the
* appropriate subfunction based on the function # in AH, and
* then simulates an IRET and returns back to the instruction emulator.
*/
VOID BiosVid()
{
COORD coord;
CHAR ch;
if (fEnableInt10 == FALSE)
return;
switch(getAH()) {
case VIDFUNC_SETCURSORPOS:
coord.X = getDL();
coord.Y = getDH();
if(SetConsoleCursorPosition(OutputHandle, coord) == FALSE)
VDprint(
VDP_LEVEL_WARNING,
("SetCursorPosition Failed X=%d Y=%d\n",
coord.X,coord.Y)
);
break;
case VIDFUNC_QUERYCURSORPOS:
VDprint(
VDP_LEVEL_WARNING,
("Query Cursor Position Not Yet Implemented\n")
);
break;
case VIDFUNC_SCROLLUP:
VDprint(
VDP_LEVEL_WARNING,
("ScrollUp Not Yet Implemented\n")
);
break;
case VIDFUNC_WRITECHARATTR:
VDprint(
VDP_LEVEL_WARNING,
("WRITECHARATTR Not Yet Implemented\n")
);
break;
case VIDFUNC_WRITETTY:
ch = getAL();
putch(ch);
break;
case VIDFUNC_QUERYMODE:
setAX(*(PWORD)RMSEGOFFTOLIN(BIOSDATA_SEG, VIDDATA_CRT_MODE));
setBX(*(PWORD)RMSEGOFFTOLIN(BIOSDATA_SEG, VIDDATA_ACTIVE_PAGE));
break;
default:
VDprint(
VDP_LEVEL_WARNING,
("SoftPC Video Support: Unimplemented function %x\n",
getAX())
);
}
}
INT tputch(INT i)
{
putch((CHAR)i);
return i;
}
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