/* AppleWin : An Apple //e emulator for Windows Copyright (C) 1994-1996, Michael O'Brien Copyright (C) 1999-2001, Oliver Schmidt Copyright (C) 2002-2005, Tom Charlesworth Copyright (C) 2006, Tom Charlesworth, Michael Pohoreski AppleWin is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. AppleWin is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with AppleWin; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* Description: Memory emulation * * Author: Various */ #include "StdAfx.h" #pragma hdrstop #define MF_80STORE 0x00000001 #define MF_ALTZP 0x00000002 #define MF_AUXREAD 0x00000004 #define MF_AUXWRITE 0x00000008 #define MF_BANK2 0x00000010 #define MF_HIGHRAM 0x00000020 #define MF_HIRES 0x00000040 #define MF_PAGE2 0x00000080 #define MF_SLOTC3ROM 0x00000100 #define MF_SLOTCXROM 0x00000200 #define MF_WRITERAM 0x00000400 #define MF_IMAGEMASK 0x000003F7 #define SW_80STORE (memmode & MF_80STORE) #define SW_ALTZP (memmode & MF_ALTZP) #define SW_AUXREAD (memmode & MF_AUXREAD) #define SW_AUXWRITE (memmode & MF_AUXWRITE) #define SW_BANK2 (memmode & MF_BANK2) #define SW_HIGHRAM (memmode & MF_HIGHRAM) #define SW_HIRES (memmode & MF_HIRES) #define SW_PAGE2 (memmode & MF_PAGE2) #define SW_SLOTC3ROM (memmode & MF_SLOTC3ROM) #define SW_SLOTCXROM (memmode & MF_SLOTCXROM) #define SW_WRITERAM (memmode & MF_WRITERAM) BYTE __stdcall NullIo (WORD programcounter, BYTE address, BYTE write, BYTE value, ULONG nCycles); iofunction ioread[0x100] = {KeybReadData, // $C000 KeybReadData, // $C001 KeybReadData, // $C002 KeybReadData, // $C003 KeybReadData, // $C004 KeybReadData, // $C005 KeybReadData, // $C006 KeybReadData, // $C007 KeybReadData, // $C008 KeybReadData, // $C009 KeybReadData, // $C00A KeybReadData, // $C00B KeybReadData, // $C00C KeybReadData, // $C00D KeybReadData, // $C00E KeybReadData, // $C00F KeybReadFlag, // $C010 MemCheckPaging, // $C011 MemCheckPaging, // $C012 MemCheckPaging, // $C013 MemCheckPaging, // $C014 MemCheckPaging, // $C015 MemCheckPaging, // $C016 MemCheckPaging, // $C017 MemCheckPaging, // $C018 VideoCheckVbl, // $C019 VideoCheckMode, // $C01A VideoCheckMode, // $C01B MemCheckPaging, // $C01C MemCheckPaging, // $C01D VideoCheckMode, // $C01E VideoCheckMode, // $C01F NullIo, // $C020 NullIo, // $C021 NullIo, // $C022 NullIo, // $C023 NullIo, // $C024 NullIo, // $C025 NullIo, // $C026 NullIo, // $C027 NullIo, // $C028 NullIo, // $C029 NullIo, // $C02A NullIo, // $C02B NullIo, // $C02C NullIo, // $C02D NullIo, // $C02E NullIo, // $C02F SpkrToggle, // $C030 SpkrToggle, // $C031 SpkrToggle, // $C032 SpkrToggle, // $C033 SpkrToggle, // $C034 SpkrToggle, // $C035 SpkrToggle, // $C036 SpkrToggle, // $C037 SpkrToggle, // $C038 SpkrToggle, // $C039 SpkrToggle, // $C03A SpkrToggle, // $C03B SpkrToggle, // $C03C SpkrToggle, // $C03D SpkrToggle, // $C03E SpkrToggle, // $C03F NullIo, // $C040 NullIo, // $C041 NullIo, // $C042 NullIo, // $C043 NullIo, // $C044 NullIo, // $C045 NullIo, // $C046 NullIo, // $C047 NullIo, // $C048 NullIo, // $C049 NullIo, // $C04A NullIo, // $C04B NullIo, // $C04C NullIo, // $C04D NullIo, // $C04E NullIo, // $C04F VideoSetMode, // $C050 VideoSetMode, // $C051 VideoSetMode, // $C052 VideoSetMode, // $C053 MemSetPaging, // $C054 MemSetPaging, // $C055 MemSetPaging, // $C056 MemSetPaging, // $C057 NullIo, // $C058 NullIo, // $C059 NullIo, // $C05A NullIo, // $C05B NullIo, // $C05C NullIo, // $C05D VideoSetMode, // $C05E VideoSetMode, // $C05F NullIo, // $C060 JoyReadButton, // $C061 JoyReadButton, // $C062 JoyReadButton, // $C063 JoyReadPosition, // $C064 JoyReadPosition, // $C065 JoyReadPosition, // $C066 JoyReadPosition, // $C067 NullIo, // $C068 NullIo, // $C069 NullIo, // $C06A NullIo, // $C06B NullIo, // $C06C NullIo, // $C06D NullIo, // $C06E NullIo, // $C06F JoyResetPosition, // $C070 NullIo, // $C071 NullIo, // $C072 NullIo, // $C073 NullIo, // $C074 NullIo, // $C075 NullIo, // $C076 NullIo, // $C077 NullIo, // $C078 NullIo, // $C079 NullIo, // $C07A NullIo, // $C07B NullIo, // $C07C NullIo, // $C07D NullIo, // $C07E VideoCheckMode, // $C07F MemSetPaging, // $C080 MemSetPaging, // $C081 MemSetPaging, // $C082 MemSetPaging, // $C083 MemSetPaging, // $C084 MemSetPaging, // $C085 MemSetPaging, // $C086 MemSetPaging, // $C087 MemSetPaging, // $C088 MemSetPaging, // $C089 MemSetPaging, // $C08A MemSetPaging, // $C08B MemSetPaging, // $C08C MemSetPaging, // $C08D MemSetPaging, // $C08E MemSetPaging, // $C08F NullIo, // $C090 NullIo, // $C091 NullIo, // $C092 NullIo, // $C093 NullIo, // $C094 NullIo, // $C095 NullIo, // $C096 NullIo, // $C097 NullIo, // $C098 NullIo, // $C099 NullIo, // $C09A NullIo, // $C09B NullIo, // $C09C NullIo, // $C09D NullIo, // $C09E NullIo, // $C09F NullIo, // $C0A0 CommDipSw, // $C0A1 CommDipSw, // $C0A2 NullIo, // $C0A3 NullIo, // $C0A4 NullIo, // $C0A5 NullIo, // $C0A6 NullIo, // $C0A7 CommReceive, // $C0A8 CommStatus, // $C0A9 CommCommand, // $C0AA CommControl, // $C0AB NullIo, // $C0AC NullIo, // $C0AD NullIo, // $C0AE NullIo, // $C0AF NullIo, // $C0B0 NullIo, // $C0B1 NullIo, // $C0B2 NullIo, // $C0B3 NullIo, // $C0B4 NullIo, // $C0B5 NullIo, // $C0B6 NullIo, // $C0B7 NullIo, // $C0B8 NullIo, // $C0B9 NullIo, // $C0BA NullIo, // $C0BB NullIo, // $C0BC NullIo, // $C0BD NullIo, // $C0BE NullIo, // $C0BF PhasorIO, // $C0C0 PhasorIO, // $C0C1 PhasorIO, // $C0C2 PhasorIO, // $C0C3 PhasorIO, // $C0C4 PhasorIO, // $C0C5 PhasorIO, // $C0C6 PhasorIO, // $C0C7 PhasorIO, // $C0C8 PhasorIO, // $C0C9 PhasorIO, // $C0CA PhasorIO, // $C0CB PhasorIO, // $C0CC PhasorIO, // $C0CD PhasorIO, // $C0CE PhasorIO, // $C0CF PhasorIO, // $C0D0 PhasorIO, // $C0D1 PhasorIO, // $C0D2 PhasorIO, // $C0D3 PhasorIO, // $C0D4 PhasorIO, // $C0D5 PhasorIO, // $C0D6 PhasorIO, // $C0D7 PhasorIO, // $C0D8 PhasorIO, // $C0D9 PhasorIO, // $C0DA PhasorIO, // $C0DB PhasorIO, // $C0DC PhasorIO, // $C0DD PhasorIO, // $C0DE PhasorIO, // $C0DF DiskControlStepper, // $C0E0 DiskControlStepper, // $C0E1 DiskControlStepper, // $C0E2 DiskControlStepper, // $C0E3 DiskControlStepper, // $C0E4 DiskControlStepper, // $C0E5 DiskControlStepper, // $C0E6 DiskControlStepper, // $C0E7 DiskControlMotor, // $C0E8 DiskControlMotor, // $C0E9 DiskEnable, // $C0EA DiskEnable, // $C0EB DiskReadWrite, // $C0EC DiskSetLatchValue, // $C0ED DiskSetReadMode, // $C0EE DiskSetWriteMode, // $C0EF HD_IO_EMUL, // $C0F0 HD_IO_EMUL, // $C0F1 HD_IO_EMUL, // $C0F2 HD_IO_EMUL, // $C0F3 HD_IO_EMUL, // $C0F4 HD_IO_EMUL, // $C0F5 HD_IO_EMUL, // $C0F6 HD_IO_EMUL, // $C0F7 HD_IO_EMUL, // $C0F8 NullIo, // $C0F9 NullIo, // $C0FA NullIo, // $C0FB NullIo, // $C0FC NullIo, // $C0FD NullIo, // $C0FE NullIo}; // $C0FF iofunction iowrite[0x100] = {MemSetPaging, // $C000 MemSetPaging, // $C001 MemSetPaging, // $C002 MemSetPaging, // $C003 MemSetPaging, // $C004 MemSetPaging, // $C005 MemSetPaging, // $C006 MemSetPaging, // $C007 MemSetPaging, // $C008 MemSetPaging, // $C009 MemSetPaging, // $C00A MemSetPaging, // $C00B VideoSetMode, // $C00C VideoSetMode, // $C00D VideoSetMode, // $C00E VideoSetMode, // $C00F KeybReadFlag, // $C010 KeybReadFlag, // $C011 KeybReadFlag, // $C012 KeybReadFlag, // $C013 KeybReadFlag, // $C014 KeybReadFlag, // $C015 KeybReadFlag, // $C016 KeybReadFlag, // $C017 KeybReadFlag, // $C018 KeybReadFlag, // $C019 KeybReadFlag, // $C01A KeybReadFlag, // $C01B KeybReadFlag, // $C01C KeybReadFlag, // $C01D KeybReadFlag, // $C01E KeybReadFlag, // $C01F NullIo, // $C020 NullIo, // $C021 NullIo, // $C022 NullIo, // $C023 NullIo, // $C024 NullIo, // $C025 NullIo, // $C026 NullIo, // $C027 NullIo, // $C028 NullIo, // $C029 NullIo, // $C02A NullIo, // $C02B NullIo, // $C02C NullIo, // $C02D NullIo, // $C02E NullIo, // $C02F SpkrToggle, // $C030 SpkrToggle, // $C031 SpkrToggle, // $C032 SpkrToggle, // $C033 SpkrToggle, // $C034 SpkrToggle, // $C035 SpkrToggle, // $C036 SpkrToggle, // $C037 SpkrToggle, // $C038 SpkrToggle, // $C039 SpkrToggle, // $C03A SpkrToggle, // $C03B SpkrToggle, // $C03C SpkrToggle, // $C03D SpkrToggle, // $C03E SpkrToggle, // $C03F NullIo, // $C040 NullIo, // $C041 NullIo, // $C042 NullIo, // $C043 NullIo, // $C044 NullIo, // $C045 NullIo, // $C046 NullIo, // $C047 NullIo, // $C048 NullIo, // $C049 NullIo, // $C04A NullIo, // $C04B NullIo, // $C04C NullIo, // $C04D NullIo, // $C04E NullIo, // $C04F VideoSetMode, // $C050 VideoSetMode, // $C051 VideoSetMode, // $C052 VideoSetMode, // $C053 MemSetPaging, // $C054 MemSetPaging, // $C055 MemSetPaging, // $C056 MemSetPaging, // $C057 NullIo, // $C058 NullIo, // $C059 NullIo, // $C05A NullIo, // $C05B NullIo, // $C05C NullIo, // $C05D VideoSetMode, // $C05E VideoSetMode, // $C05F NullIo, // $C060 NullIo, // $C061 NullIo, // $C062 NullIo, // $C063 NullIo, // $C064 NullIo, // $C065 NullIo, // $C066 NullIo, // $C067 NullIo, // $C068 NullIo, // $C069 NullIo, // $C06A NullIo, // $C06B NullIo, // $C06C NullIo, // $C06D NullIo, // $C06E NullIo, // $C06F JoyResetPosition, // $C070 #ifdef RAMWORKS MemSetPaging, // $C071 - extended memory card set page NullIo, // $C072 MemSetPaging, // $C073 - Ramworks III set page #else NullIo, // $C071 NullIo, // $C072 NullIo, // $C073 #endif NullIo, // $C074 NullIo, // $C075 NullIo, // $C076 NullIo, // $C077 NullIo, // $C078 NullIo, // $C079 NullIo, // $C07A NullIo, // $C07B NullIo, // $C07C NullIo, // $C07D NullIo, // $C07E NullIo, // $C07F MemSetPaging, // $C080 MemSetPaging, // $C081 MemSetPaging, // $C082 MemSetPaging, // $C083 MemSetPaging, // $C084 MemSetPaging, // $C085 MemSetPaging, // $C086 MemSetPaging, // $C087 MemSetPaging, // $C088 MemSetPaging, // $C089 MemSetPaging, // $C08A MemSetPaging, // $C08B MemSetPaging, // $C08C MemSetPaging, // $C08D MemSetPaging, // $C08E MemSetPaging, // $C08F NullIo, // $C090 NullIo, // $C091 NullIo, // $C092 NullIo, // $C093 NullIo, // $C094 NullIo, // $C095 NullIo, // $C096 NullIo, // $C097 NullIo, // $C098 NullIo, // $C099 NullIo, // $C09A NullIo, // $C09B NullIo, // $C09C NullIo, // $C09D NullIo, // $C09E NullIo, // $C09F NullIo, // $C0A0 NullIo, // $C0A1 NullIo, // $C0A2 NullIo, // $C0A3 NullIo, // $C0A4 NullIo, // $C0A5 NullIo, // $C0A6 NullIo, // $C0A7 CommTransmit, // $C0A8 CommStatus, // $C0A9 CommCommand, // $C0AA CommControl, // $C0AB NullIo, // $C0AC NullIo, // $C0AD NullIo, // $C0AE NullIo, // $C0AF NullIo, // $C0B0 NullIo, // $C0B1 NullIo, // $C0B2 NullIo, // $C0B3 NullIo, // $C0B4 NullIo, // $C0B5 NullIo, // $C0B6 NullIo, // $C0B7 NullIo, // $C0B8 NullIo, // $C0B9 NullIo, // $C0BA NullIo, // $C0BB NullIo, // $C0BC NullIo, // $C0BD NullIo, // $C0BE NullIo, // $C0BF PhasorIO, // $C0C0 PhasorIO, // $C0C1 PhasorIO, // $C0C2 PhasorIO, // $C0C3 PhasorIO, // $C0C4 PhasorIO, // $C0C5 PhasorIO, // $C0C6 PhasorIO, // $C0C7 PhasorIO, // $C0C8 PhasorIO, // $C0C9 PhasorIO, // $C0CA PhasorIO, // $C0CB PhasorIO, // $C0CC PhasorIO, // $C0CD PhasorIO, // $C0CE PhasorIO, // $C0CF PhasorIO, // $C0D0 PhasorIO, // $C0D1 PhasorIO, // $C0D2 PhasorIO, // $C0D3 PhasorIO, // $C0D4 PhasorIO, // $C0D5 PhasorIO, // $C0D6 PhasorIO, // $C0D7 PhasorIO, // $C0D8 PhasorIO, // $C0D9 PhasorIO, // $C0DA PhasorIO, // $C0DB PhasorIO, // $C0DC PhasorIO, // $C0DD PhasorIO, // $C0DE PhasorIO, // $C0DF DiskControlStepper, // $C0E0 DiskControlStepper, // $C0E1 DiskControlStepper, // $C0E2 DiskControlStepper, // $C0E3 DiskControlStepper, // $C0E4 DiskControlStepper, // $C0E5 DiskControlStepper, // $C0E6 DiskControlStepper, // $C0E7 DiskControlMotor, // $C0E8 DiskControlMotor, // $C0E9 DiskEnable, // $C0EA DiskEnable, // $C0EB DiskReadWrite, // $C0EC DiskSetLatchValue, // $C0ED DiskSetReadMode, // $C0EE DiskSetWriteMode, // $C0EF HD_IO_EMUL, // $C0F0 HD_IO_EMUL, // $C0F1 HD_IO_EMUL, // $C0F2 HD_IO_EMUL, // $C0F3 HD_IO_EMUL, // $C0F4 HD_IO_EMUL, // $C0F5 HD_IO_EMUL, // $C0F6 HD_IO_EMUL, // $C0F7 HD_IO_EMUL, // $C0F8 NullIo, // $C0F9 NullIo, // $C0FA NullIo, // $C0FB NullIo, // $C0FC NullIo, // $C0FD NullIo, // $C0FE NullIo}; // $C0FF static DWORD imagemode[MAXIMAGES]; LPBYTE memshadow[MAXIMAGES][0x100]; LPBYTE memwrite[MAXIMAGES][0x100]; static BOOL fastpaging = 0; DWORD image = 0; DWORD lastimage = 0; static BOOL lastwriteram = 0; LPBYTE mem = NULL; static LPBYTE memaux = NULL; LPBYTE memdirty = NULL; static LPBYTE memimage = NULL; static LPBYTE memmain = NULL; static DWORD memmode = MF_BANK2 | MF_SLOTCXROM | MF_WRITERAM; static LPBYTE memrom = NULL; static BOOL modechanging = 0; DWORD pages = 0; #ifdef RAMWORKS UINT g_uMaxExPages = 1; // user requested ram pages static LPBYTE RWpages[128]; // pointers to RW memory banks #endif void UpdatePaging (BOOL initialize, BOOL updatewriteonly); //=========================================================================== void BackMainImage () { int loop = 0; for (loop = 0; loop < 256; loop++) { if (memshadow[0][loop] && ((*(memdirty+loop) & 1) || (loop <= 1))) CopyMemory(memshadow[0][loop],memimage+(loop << 8),256); *(memdirty+loop) &= ~1; } } //=========================================================================== BYTE __stdcall NullIo (WORD programcounter, BYTE address, BYTE write, BYTE value, ULONG nCycles) { if ((address & 0xF0) == 0xA0) { static const BYTE retval[16] = {0x58,0xFC,0x5B,0xFF,0x58,0xFC,0x5B,0xFF, 0x0B,0x10,0x00,0x00,0xFF,0xFF,0xFF,0xFF}; return retval[address & 15]; } else if ((address >= 0xB0) && (address <= 0xCF)) { BYTE r = (BYTE)(rand() & 0xFF); if (r >= 0x10) return 0xA0; else if (r >= 8) return (r > 0xC) ? 0xFF : 0x00; else return (address & 0xF7); } else if ((address & 0xF0) == 0xD0) { BYTE r = (BYTE)(rand() & 0xFF); if (r >= 0xC0) return 0xC0; else if (r >= 0x80) return 0x80; else if ((address == 0xD0) || (address == 0xDF)) return 0; else if (r >= 0x40) return 0x40; else if (r >= 0x30) return 0x90; else return 0; } else return MemReturnRandomData(1); } //=========================================================================== void ResetPaging (BOOL initialize) { if (!initialize) MemSetFastPaging(0); lastwriteram = 0; memmode = MF_BANK2 | MF_SLOTCXROM | MF_WRITERAM; UpdatePaging(initialize,0); } //=========================================================================== void UpdateFastPaging () { BOOL found = 0; DWORD imagenum = 0; do if ((imagemode[imagenum] == memmode) || ((lastimage >= 3) && ((imagemode[imagenum] & MF_IMAGEMASK) == (memmode & MF_IMAGEMASK)))) found = 1; else ++imagenum; while ((imagenum <= lastimage) && !found); if (found) { image = imagenum; mem = memimage+(image << 16); if (imagemode[image] != memmode) { imagemode[image] = memmode; UpdatePaging(0,1); } } else { if (lastimage < MAXIMAGES-1) { imagenum = ++lastimage; if (lastimage >= 3) VirtualAlloc(memimage+lastimage*0x10000,0x10000,MEM_COMMIT,PAGE_READWRITE); } else { static DWORD nextimage = 0; if (nextimage > lastimage) nextimage = 0; imagenum = nextimage++; } imagemode[image = imagenum] = memmode; mem = memimage+(image << 16); UpdatePaging(1,0); } CpuReinitialize(); } //=========================================================================== void UpdatePaging (BOOL initialize, BOOL updatewriteonly) { // SAVE THE CURRENT PAGING SHADOW TABLE LPBYTE oldshadow[256]; if (!(initialize || fastpaging || updatewriteonly)) CopyMemory(oldshadow,memshadow[image],256*sizeof(LPBYTE)); // UPDATE THE PAGING TABLES BASED ON THE NEW PAGING SWITCH VALUES int loop; if (initialize) { for (loop = 0; loop < 192; loop++) memwrite[image][loop] = mem+(loop << 8); for (loop = 192; loop < 208; loop++) // TC: [0xC000..0xCF00] memwrite[image][loop] = NULL; } if (!updatewriteonly) for (loop = 0; loop < 2; loop++) memshadow[image][loop] = SW_ALTZP ? memaux+(loop << 8) : memmain+(loop << 8); for (loop = 2; loop < 192; loop++) { memshadow[image][loop] = SW_AUXREAD ? memaux+(loop << 8) : memmain+(loop << 8); memwrite[image][loop] = ((SW_AUXREAD != 0) == (SW_AUXWRITE != 0)) ? mem+(loop << 8) : SW_AUXWRITE ? memaux+(loop << 8) : memmain+(loop << 8); } if (!updatewriteonly) { for (loop = 192; loop < 200; loop++) if (loop == 195) memshadow[image][loop] = (SW_SLOTC3ROM && SW_SLOTCXROM) ? memrom+0x0300 : memrom+0x1300; else memshadow[image][loop] = SW_SLOTCXROM ? memrom+(loop << 8)-0xC000 : memrom+(loop << 8)-0xB000; for (loop = 200; loop < 208; loop++) memshadow[image][loop] = memrom+(loop << 8)-0xB000; } for (loop = 208; loop < 224; loop++) { int bankoffset = (SW_BANK2 ? 0 : 0x1000); memshadow[image][loop] = SW_HIGHRAM ? SW_ALTZP ? memaux+(loop << 8)-bankoffset : memmain+(loop << 8)-bankoffset : memrom+(loop << 8)-0xB000; memwrite[image][loop] = SW_WRITERAM ? SW_HIGHRAM ? mem+(loop << 8) : SW_ALTZP ? memaux+(loop << 8)-bankoffset : memmain+(loop << 8)-bankoffset : NULL; } for (loop = 224; loop < 256; loop++) { memshadow[image][loop] = SW_HIGHRAM ? SW_ALTZP ? memaux+(loop << 8) : memmain+(loop << 8) : memrom+(loop << 8)-0xB000; memwrite[image][loop] = SW_WRITERAM ? SW_HIGHRAM ? mem+(loop << 8) : SW_ALTZP ? memaux+(loop << 8) : memmain+(loop << 8) : NULL; } if (SW_80STORE) { for (loop = 4; loop < 8; loop++) { memshadow[image][loop] = SW_PAGE2 ? memaux+(loop << 8) : memmain+(loop << 8); memwrite[image][loop] = mem+(loop << 8); } if (SW_HIRES) for (loop = 32; loop < 64; loop++) { memshadow[image][loop] = SW_PAGE2 ? memaux+(loop << 8) : memmain+(loop << 8); memwrite[image][loop] = mem+(loop << 8); } } // MOVE MEMORY BACK AND FORTH AS NECESSARY BETWEEN THE SHADOW AREAS AND // THE MAIN RAM IMAGE TO KEEP BOTH SETS OF MEMORY CONSISTENT WITH THE NEW // PAGING SHADOW TABLE if (!updatewriteonly) for (loop = 0; loop < 256; loop++) if (initialize || (oldshadow[loop] != memshadow[image][loop])) { if ((!(initialize || fastpaging)) && ((*(memdirty+loop) & 1) || (loop <= 1))) { *(memdirty+loop) &= ~1; CopyMemory(oldshadow[loop],mem+(loop << 8),256); } CopyMemory(mem+(loop << 8),memshadow[image][loop],256); } } // // ----- ALL GLOBALLY ACCESSIBLE FUNCTIONS ARE BELOW THIS LINE ----- // //=========================================================================== BYTE __stdcall MemCheckPaging (WORD, BYTE address, BYTE, BYTE, ULONG) { BOOL result = 0; switch (address) { case 0x11: result = SW_BANK2; break; case 0x12: result = SW_HIGHRAM; break; case 0x13: result = SW_AUXREAD; break; case 0x14: result = SW_AUXWRITE; break; case 0x15: result = !SW_SLOTCXROM; break; case 0x16: result = SW_ALTZP; break; case 0x17: result = SW_SLOTC3ROM; break; case 0x18: result = SW_80STORE; break; case 0x1C: result = SW_PAGE2; break; case 0x1D: result = SW_HIRES; break; } return KeybGetKeycode() | (result ? 0x80 : 0); } //=========================================================================== void MemDestroy () { if (fastpaging) MemSetFastPaging(0); VirtualFree(memimage,MAX(0x30000,0x10000*(lastimage+1)),MEM_DECOMMIT); VirtualFree(memaux ,0,MEM_RELEASE); VirtualFree(memdirty,0,MEM_RELEASE); VirtualFree(memimage,0,MEM_RELEASE); VirtualFree(memmain ,0,MEM_RELEASE); VirtualFree(memrom ,0,MEM_RELEASE); #ifdef RAMWORKS for (UINT i=1; i> 8)] == (memaux+(offset & 0xFF00))) ? mem+offset : memaux+offset; #ifdef RAMWORKS if ( ((SW_PAGE2 && SW_80STORE) || VideoGetSW80COL()) && ( ( ((offset & 0xFF00)>=0x0400) && ((offset & 0xFF00)<=0700) ) || ( SW_HIRES && ((offset & 0xFF00)>=0x2000) && ((offset & 0xFF00)<=0x3F00) ) ) ) { lpMem = (memshadow[image][(offset >> 8)] == (RWpages[0]+(offset & 0xFF00))) ? mem+offset : RWpages[0]+offset; } #endif return lpMem; } //=========================================================================== LPBYTE MemGetMainPtr (WORD offset) { return (memshadow[image][(offset >> 8)] == (memmain+(offset & 0xFF00))) ? mem+offset : memmain+offset; } //=========================================================================== void MemInitialize () { // ALLOCATE MEMORY FOR THE APPLE MEMORY IMAGE AND ASSOCIATED DATA // STRUCTURES // // THE MEMIMAGE BUFFER CAN CONTAIN EITHER MULTIPLE MEMORY IMAGES OR // ONE MEMORY IMAGE WITH COMPILER DATA memaux = (LPBYTE)VirtualAlloc(NULL,0x10000,MEM_COMMIT,PAGE_READWRITE); memdirty = (LPBYTE)VirtualAlloc(NULL,0x100 ,MEM_COMMIT,PAGE_READWRITE); memmain = (LPBYTE)VirtualAlloc(NULL,0x10000,MEM_COMMIT,PAGE_READWRITE); memrom = (LPBYTE)VirtualAlloc(NULL,0x5000 ,MEM_COMMIT,PAGE_READWRITE); memimage = (LPBYTE)VirtualAlloc(NULL, MAX(0x30000,MAXIMAGES*0x10000), MEM_RESERVE,PAGE_NOACCESS); if ((!memaux) || (!memdirty) || (!memimage) || (!memmain) || (!memrom)) { MessageBox(GetDesktopWindow(), TEXT("The emulator was unable to allocate the memory it ") TEXT("requires. Further execution is not possible."), TITLE, MB_ICONSTOP | MB_SETFOREGROUND); ExitProcess(1); } { LPVOID newloc = VirtualAlloc(memimage,0x30000,MEM_COMMIT,PAGE_READWRITE); if (newloc != memimage) MessageBox(GetDesktopWindow(), TEXT("The emulator has detected a bug in your operating ") TEXT("system. While changing the attributes of a memory ") TEXT("object, the operating system also changed its ") TEXT("location."), TITLE, MB_ICONEXCLAMATION | MB_SETFOREGROUND); } #ifdef RAMWORKS // allocate memory for RAMWorks III - up to 8MB RWpages[0] = memaux; UINT i = 1; while ((i < g_uMaxExPages) && (RWpages[i] = (LPBYTE) VirtualAlloc(NULL,0x10000,MEM_COMMIT,PAGE_READWRITE))) i++; #endif // READ THE APPLE FIRMWARE ROMS INTO THE ROM IMAGE TCHAR sRomFileName[ 128 ]; _tcscpy( sRomFileName, apple2e ? TEXT("APPLE2E.ROM") : TEXT("APPLE2.ROM") ); TCHAR filename[MAX_PATH]; _tcscpy(filename,progdir); _tcscat(filename,sRomFileName ); HANDLE file = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, (LPSECURITY_ATTRIBUTES)NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL); if (file == INVALID_HANDLE_VALUE) { TCHAR sText[ 256 ]; wsprintf( sText, TEXT("Unable to open the required firmware ROM data file.\n\nFile: %s."), sRomFileName ); MessageBox(GetDesktopWindow(), sText, TITLE, MB_ICONSTOP | MB_SETFOREGROUND); ExitProcess(1); } DWORD bytesread; ReadFile(file,memrom,0x5000,&bytesread,NULL); // HACK: Magic # CloseHandle(file); // TODO/FIXME: HACK! REMOVE A WAIT ROUTINE FROM THE DISK CONTROLLER'S FIRMWARE { *(memrom+0x064C) = 0xA9; *(memrom+0x064D) = 0x00; *(memrom+0x064E) = 0xEA; } HD_Load_Rom(memrom); // HDD f/w gets loaded to $C700 MemReset(); } //=========================================================================== // Call by: // . ResetMachineState() eg. Power-cycle ('Apple-Go' button) // . Snapshot_LoadState() void MemReset () { // TURN OFF FAST PAGING IF IT IS CURRENTLY ACTIVE MemSetFastPaging(0); // INITIALIZE THE PAGING TABLES ZeroMemory(memshadow,MAXIMAGES*256*sizeof(LPBYTE)); ZeroMemory(memwrite ,MAXIMAGES*256*sizeof(LPBYTE)); // INITIALIZE THE RAM IMAGES ZeroMemory(memaux ,0x10000); ZeroMemory(memmain,0x10000); // SET UP THE MEMORY IMAGE mem = memimage; image = 0; // INITIALIZE THE CPU CpuInitialize(); // INITIALIZE PAGING, FILLING IN THE 64K MEMORY IMAGE ResetPaging(1); regs.pc = *(LPWORD)(mem+0xFFFC); regs.bIRQ = 0; } //=========================================================================== // Call by: // . Soft-reset (Ctrl+Reset) // . Snapshot_LoadState() void MemResetPaging () { ResetPaging(0); } //=========================================================================== BYTE MemReturnRandomData (BYTE highbit) { static const BYTE retval[16] = {0x00,0x2D,0x2D,0x30,0x30,0x32,0x32,0x34, 0x35,0x39,0x43,0x43,0x43,0x60,0x7F,0x7F}; BYTE r = (BYTE)(rand() & 0xFF); if (r <= 170) return 0x20 | (highbit ? 0x80 : 0); else return retval[r & 15] | (highbit ? 0x80 : 0); } //=========================================================================== void MemSetFastPaging (BOOL on) { if (fastpaging && modechanging) { modechanging = 0; UpdateFastPaging(); } else if (!fastpaging) { BackMainImage(); if (lastimage >= 3) VirtualFree(memimage+0x30000,(lastimage-2) << 16,MEM_DECOMMIT); } fastpaging = on; image = 0; mem = memimage; lastimage = 0; imagemode[0] = memmode; if (!fastpaging) UpdatePaging(1,0); cpuemtype = fastpaging ? CPU_FASTPAGING : CPU_COMPILING; CpuReinitialize(); if (cpuemtype == CPU_COMPILING) CpuResetCompilerData(); } //=========================================================================== BYTE __stdcall MemSetPaging (WORD programcounter, BYTE address, BYTE write, BYTE value, ULONG) { DWORD lastmemmode = memmode; // DETERMINE THE NEW MEMORY PAGING MODE. if ((address >= 0x80) && (address <= 0x8F)) { BOOL writeram = (address & 1); memmode &= ~(MF_BANK2 | MF_HIGHRAM | MF_WRITERAM); lastwriteram = 1; // note: because diags.do doesn't set switches twice! if (lastwriteram && writeram) memmode |= MF_WRITERAM; if (!(address & 8)) memmode |= MF_BANK2; if (((address & 2) >> 1) == (address & 1)) memmode |= MF_HIGHRAM; lastwriteram = writeram; } else if (apple2e) { switch (address) { case 0x00: memmode &= ~MF_80STORE; break; case 0x01: memmode |= MF_80STORE; break; case 0x02: memmode &= ~MF_AUXREAD; break; case 0x03: memmode |= MF_AUXREAD; break; case 0x04: memmode &= ~MF_AUXWRITE; break; case 0x05: memmode |= MF_AUXWRITE; break; case 0x06: memmode |= MF_SLOTCXROM; break; case 0x07: memmode &= ~MF_SLOTCXROM; break; case 0x08: memmode &= ~MF_ALTZP; break; case 0x09: memmode |= MF_ALTZP; break; case 0x0A: memmode &= ~MF_SLOTC3ROM; break; case 0x0B: memmode |= MF_SLOTC3ROM; break; case 0x54: memmode &= ~MF_PAGE2; break; case 0x55: memmode |= MF_PAGE2; break; case 0x56: memmode &= ~MF_HIRES; break; case 0x57: memmode |= MF_HIRES; break; #ifdef RAMWORKS case 0x71: // extended memory aux page number case 0x73: // Ramworks III set aux page number if ((value < g_uMaxExPages) && RWpages[value]) { memaux = RWpages[value]; //memmode &= ~MF_RWPMASK; //memmode |= value; if (fastpaging) { UpdateFastPaging(); } else { UpdatePaging(0,0); if (cpuemtype == CPU_COMPILING) CpuResetCompilerData(); } } break; #endif } } // IF THE EMULATED PROGRAM HAS JUST UPDATE THE MEMORY WRITE MODE AND IS // ABOUT TO UPDATE THE MEMORY READ MODE, HOLD OFF ON ANY PROCESSING UNTIL // IT DOES SO. if ((address >= 4) && (address <= 5) && ((*(LPDWORD)(mem+programcounter) & 0x00FFFEFF) == 0x00C0028D)) { modechanging = 1; return write ? 0 : MemReturnRandomData(1); } if ((address >= 0x80) && (address <= 0x8F) && (programcounter < 0xC000) && (((*(LPDWORD)(mem+programcounter) & 0x00FFFEFF) == 0x00C0048D) || ((*(LPDWORD)(mem+programcounter) & 0x00FFFEFF) == 0x00C0028D))) { modechanging = 1; return write ? 0 : MemReturnRandomData(1); } // IF THE MEMORY PAGING MODE HAS CHANGED, UPDATE OUR MEMORY IMAGES AND // WRITE TABLES. if ((lastmemmode != memmode) || modechanging) { modechanging = 0; ++pages; // IF FAST PAGING IS ACTIVE, WE KEEP MULTIPLE COMPLETE MEMORY IMAGES // AND WRITE TABLES, AND SWITCH BETWEEN THEM. THE FAST PAGING VERSION // OF THE CPU EMULATOR KEEPS ALL OF THE IMAGES COHERENT. if (fastpaging) UpdateFastPaging(); // IF FAST PAGING IS NOT ACTIVE THEN WE KEEP ONLY ONE MEMORY IMAGE AND // WRITE TABLE, AND UPDATE THEM EVERY TIME PAGING IS CHANGED. else { UpdatePaging(0,0); if (cpuemtype == CPU_COMPILING) CpuResetCompilerData(); } } if ((address <= 1) || ((address >= 0x54) && (address <= 0x57))) VideoSetMode(programcounter,address,write,value,0); return write ? 0 : MemReturnRandomData(((address == 0x54) || (address == 0x55)) ? (SW_PAGE2 != 0) : 1); } //=========================================================================== void MemTrimImages () { if (fastpaging && (lastimage > 2)) { if (modechanging) { modechanging = 0; UpdateFastPaging(); } static DWORD trimnumber = 0; if ((image != trimnumber) && (image != lastimage) && (trimnumber < lastimage)) { imagemode[trimnumber] = imagemode[lastimage]; VirtualFree(memimage+(lastimage-- << 16),0x10000,MEM_DECOMMIT); DWORD realimage = image; image = trimnumber; mem = memimage+(image << 16); memmode = imagemode[image]; UpdatePaging(1,0); image = realimage; mem = memimage+(image << 16); memmode = imagemode[image]; CpuReinitialize(); } if (++trimnumber >= lastimage) trimnumber = 0; } } //=========================================================================== BYTE __stdcall CxReadFunc(WORD, WORD nAddr, BYTE, BYTE, ULONG nCyclesLeft) { USHORT nPage = nAddr>>8; // Don't use BYTE - Bug in VC++ 6.0 (SP5)! CpuCalcCycles(nCyclesLeft); if(!apple2e || SW_SLOTCXROM) { if((nPage == 0xC4) || (nPage == 0xC5)) { // Slot 4 or 5: Mockingboard return MB_Read(nAddr); } else { return mem[nAddr]; } } else { #if _DEBUG // Gets triggered by opcode $29 (IMM AND) by internal emulation code // if((nPage == 0xC4) || (nPage == 0xC5)) // _ASSERT(0); #endif return mem[nAddr]; } } BYTE __stdcall CxWriteFunc(WORD, WORD nAddr, BYTE, BYTE nValue, ULONG nCyclesLeft) { BYTE nPage = nAddr>>8; CpuCalcCycles(nCyclesLeft); if(!apple2e || SW_SLOTCXROM) { if((nPage == 0xC4) || (nPage == 0xC5)) { // Slot 4 or 5: Mockingboard MB_Write(nAddr, nValue); } } #if _DEBUG else { if((nPage == 0xC4) || (nPage == 0xC5)) _ASSERT(0); } #endif return 0; } //=========================================================================== DWORD MemGetSnapshot(SS_BaseMemory* pSS) { pSS->dwMemMode = memmode; pSS->bLastWriteRam = lastwriteram; for(DWORD dwOffset = 0x0000; dwOffset < 0x10000; dwOffset+=0x100) { memcpy(pSS->nMemMain+dwOffset, MemGetMainPtr((WORD)dwOffset), 0x100); memcpy(pSS->nMemAux+dwOffset, MemGetAuxPtr((WORD)dwOffset), 0x100); } return 0; } DWORD MemSetSnapshot(SS_BaseMemory* pSS) { memmode = pSS->dwMemMode; lastwriteram = pSS->bLastWriteRam; memcpy(memmain, pSS->nMemMain, nMemMainSize); memcpy(memaux, pSS->nMemAux, nMemAuxSize); // pages = 0; modechanging = 0; UpdatePaging(1,0); // Initialize=1, UpdateWriteOnly=0 return 0; }