/* * DOS memory emulation * * Copyright 1995 Alexandre Julliard */ #include #include #include #include #include "windows.h" #include "global.h" #include "ldt.h" #include "miscemu.h" #include "module.h" #include "xmalloc.h" HANDLE DOSMEM_BiosSeg; /* BIOS data segment at 0x40:0 */ #pragma pack(1) typedef struct { WORD Com1Addr; /* 00: COM1 I/O address */ WORD Com2Addr; /* 02: COM2 I/O address */ WORD Com3Addr; /* 04: COM3 I/O address */ WORD Com4Addr; /* 06: COM4 I/O address */ WORD Lpt1Addr; /* 08: LPT1 I/O address */ WORD Lpt2Addr; /* 0a: LPT2 I/O address */ WORD Lpt3Addr; /* 0c: LPT3 I/O address */ WORD Lpt4Addr; /* 0e: LPT4 I/O address */ WORD InstalledHardware; /* 10: Installed hardware flags */ BYTE POSTstatus; /* 12: Power-On Self Test status */ WORD MemSize WINE_PACKED; /* 13: Base memory size in Kb */ WORD unused1 WINE_PACKED; /* 15: Manufacturing test scratch pad */ BYTE KbdFlags1; /* 17: Keyboard flags 1 */ BYTE KbdFlags2; /* 18: Keyboard flags 2 */ BYTE unused2; /* 19: Keyboard driver workspace */ WORD NextKbdCharPtr; /* 1a: Next character in kbd buffer */ WORD FirstKbdCharPtr; /* 1c: First character in kbd buffer */ WORD KbdBuffer[16]; /* 1e: Keyboard buffer */ BYTE DisketteStatus1; /* 3e: Diskette recalibrate status */ BYTE DisketteStatus2; /* 3f: Diskette motor status */ BYTE DisketteStatus3; /* 40: Diskette motor timeout */ BYTE DisketteStatus4; /* 41: Diskette last operation status */ BYTE DiskStatus[7]; /* 42: Disk status/command bytes */ BYTE VideoMode; /* 49: Video mode */ WORD VideoColumns; /* 4a: Number of columns */ WORD VideoPageSize; /* 4c: Video page size in bytes */ WORD VideoPageStartAddr; /* 4e: Video page start address */ BYTE VideoCursorPos[16]; /* 50: Cursor position for 8 pages */ WORD VideoCursorType; /* 60: Video cursor type */ BYTE VideoCurPage; /* 62: Video current page */ WORD VideoCtrlAddr WINE_PACKED; /* 63: Video controller address */ BYTE VideoReg1; /* 65: Video mode select register */ BYTE VideoReg2; /* 66: Video CGA palette register */ DWORD ResetEntry WINE_PACKED; /* 67: Warm reset entry point */ BYTE LastIRQ; /* 6b: Last unexpected interrupt */ DWORD Ticks; /* 6c: Ticks since midnight */ BYTE TicksOverflow; /* 70: Timer overflow if past midnight */ BYTE CtrlBreakFlag; /* 71: Ctrl-Break flag */ WORD ResetFlag; /* 72: POST Reset flag */ BYTE DiskOpStatus; /* 74: Last hard-disk operation status */ BYTE NbHardDisks; /* 75: Number of hard disks */ BYTE DiskCtrlByte; /* 76: Disk control byte */ BYTE DiskIOPort; /* 77: Disk I/O port offset */ BYTE LptTimeout[4]; /* 78: Timeouts for parallel ports */ BYTE ComTimeout[4]; /* 7c: Timeouts for serial ports */ WORD KbdBufferStart; /* 80: Keyboard buffer start */ WORD KbdBufferEnd; /* 82: Keyboard buffer end */ } BIOSDATA; #pragma pack(4) static BIOSDATA *pBiosData = NULL; /*********************************************************************** * DOSMEM_Init * * Create the dos memory segments, and store them into the KERNEL * exported values. MODULE_Init() must already have been called. */ BOOL DOSMEM_Init(void) { HMODULE hModule = GetModuleHandle( "KERNEL" ); char *dosmem; /* Allocate 7 64k segments for 0000, A000, B000, C000, D000, E000, F000. */ dosmem = xmalloc( 0x70000 ); MODULE_SetEntryPoint( hModule, 183, /* KERNEL.183: __0000H */ GLOBAL_CreateBlock( GMEM_FIXED, dosmem, 0x10000, hModule, FALSE, FALSE, FALSE, NULL )); DOSMEM_BiosSeg = GLOBAL_CreateBlock( GMEM_FIXED, dosmem + 0x400, 0x100, hModule, FALSE, FALSE, FALSE, NULL ); MODULE_SetEntryPoint( hModule, 193, /* KERNEL.193: __0040H */ DOSMEM_BiosSeg ); MODULE_SetEntryPoint( hModule, 174, /* KERNEL.174: __A000H */ GLOBAL_CreateBlock( GMEM_FIXED, dosmem + 0x10000, 0x10000, hModule, FALSE, FALSE, FALSE, NULL )); MODULE_SetEntryPoint( hModule, 181, /* KERNEL.181: __B000H */ GLOBAL_CreateBlock( GMEM_FIXED, dosmem + 0x20000, 0x10000, hModule, FALSE, FALSE, FALSE, NULL )); MODULE_SetEntryPoint( hModule, 182, /* KERNEL.182: __B800H */ GLOBAL_CreateBlock( GMEM_FIXED, dosmem + 0x28000, 0x10000, hModule, FALSE, FALSE, FALSE, NULL )); MODULE_SetEntryPoint( hModule, 195, /* KERNEL.195: __C000H */ GLOBAL_CreateBlock( GMEM_FIXED, dosmem + 0x30000, 0x10000, hModule, FALSE, FALSE, FALSE, NULL )); MODULE_SetEntryPoint( hModule, 179, /* KERNEL.179: __D000H */ GLOBAL_CreateBlock( GMEM_FIXED, dosmem + 0x40000, 0x10000, hModule, FALSE, FALSE, FALSE, NULL )); MODULE_SetEntryPoint( hModule, 190, /* KERNEL.190: __E000H */ GLOBAL_CreateBlock( GMEM_FIXED, dosmem + 0x50000, 0x10000, hModule, FALSE, FALSE, FALSE, NULL )); MODULE_SetEntryPoint( hModule, 173, /* KERNEL.173: __ROMBIOS */ GLOBAL_CreateBlock( GMEM_FIXED, dosmem + 0x60000, 0x10000, hModule, FALSE, FALSE, FALSE, NULL )); MODULE_SetEntryPoint( hModule, 194, /* KERNEL.194: __F000H */ GLOBAL_CreateBlock( GMEM_FIXED, dosmem + 0x60000, 0x10000, hModule, FALSE, FALSE, FALSE, NULL )); DOSMEM_FillBiosSegment(); return TRUE; } /*********************************************************************** * DOSMEM_Tick * * Increment the BIOS tick counter. Called by timer signal handler. */ void DOSMEM_Tick(void) { pBiosData->Ticks++; } /*********************************************************************** * DOSMEM_FillBiosSegment * * Fill the BIOS data segment with dummy values. */ void DOSMEM_FillBiosSegment(void) { extern void SIGNAL_StartBIOSTimer(void); pBiosData = (BIOSDATA *)GlobalLock( DOSMEM_BiosSeg ); /* Clear all unused values */ memset( pBiosData, 0, sizeof(*pBiosData) ); /* FIXME: should check the number of configured drives and ports */ pBiosData->Com1Addr = 0x3e8; pBiosData->Com2Addr = 0x2e8; pBiosData->Lpt1Addr = 0x378; pBiosData->Lpt2Addr = 0x278; pBiosData->InstalledHardware = 0x8443; pBiosData->MemSize = 640; pBiosData->NextKbdCharPtr = 0x1e; pBiosData->FirstKbdCharPtr = 0x1e; pBiosData->VideoMode = 0; pBiosData->VideoColumns = 80; pBiosData->VideoPageSize = 80 * 25 * 2; pBiosData->VideoPageStartAddr = 0xb800; pBiosData->VideoCtrlAddr = 0x3d4; pBiosData->Ticks = INT1A_GetTicksSinceMidnight(); pBiosData->NbHardDisks = 2; pBiosData->KbdBufferStart = 0x1e; pBiosData->KbdBufferEnd = 0x3e; SIGNAL_StartBIOSTimer(); }