diff options
Diffstat (limited to 'private/mvdm/v86/scaffold/i386/fakevid.c')
| -rw-r--r-- | private/mvdm/v86/scaffold/i386/fakevid.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/private/mvdm/v86/scaffold/i386/fakevid.c b/private/mvdm/v86/scaffold/i386/fakevid.c new file mode 100644 index 000000000..450737c80 --- /dev/null +++ b/private/mvdm/v86/scaffold/i386/fakevid.c @@ -0,0 +1,175 @@ + +// +// 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; +} |