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