1362 lines
41 KiB
C++
1362 lines
41 KiB
C++
/*
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AppleWin : An Apple //e emulator for Windows
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Copyright (C) 1994-1996, Michael O'Brien
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Copyright (C) 1999-2001, Oliver Schmidt
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Copyright (C) 2002-2005, Tom Charlesworth
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Copyright (C) 2006-2007, Tom Charlesworth, Michael Pohoreski
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AppleWin is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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AppleWin is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with AppleWin; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Description: Memory emulation
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*
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* Author: Various
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*/
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/* Adaptation for SDL and POSIX (l) by beom beotiger, Nov-Dec 2007 */
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#include "stdafx.h"
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//#pragma hdrstop
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#include "MouseInterface.h"
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#include "resource.h"
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#include "wwrapper.h"
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#include <assert.h>
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// for mlock - munlock
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#include <sys/mman.h>
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#define MF_80STORE 0x00000001
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#define MF_ALTZP 0x00000002
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#define MF_AUXREAD 0x00000004
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#define MF_AUXWRITE 0x00000008
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#define MF_BANK2 0x00000010
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#define MF_HIGHRAM 0x00000020
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#define MF_HIRES 0x00000040
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#define MF_PAGE2 0x00000080
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#define MF_SLOTC3ROM 0x00000100
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#define MF_SLOTCXROM 0x00000200
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#define MF_WRITERAM 0x00000400
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#define MF_IMAGEMASK 0x000003F7
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#define SW_80STORE (memmode & MF_80STORE)
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#define SW_ALTZP (memmode & MF_ALTZP)
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#define SW_AUXREAD (memmode & MF_AUXREAD)
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#define SW_AUXWRITE (memmode & MF_AUXWRITE)
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#define SW_BANK2 (memmode & MF_BANK2)
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#define SW_HIGHRAM (memmode & MF_HIGHRAM)
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#define SW_HIRES (memmode & MF_HIRES)
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#define SW_PAGE2 (memmode & MF_PAGE2)
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#define SW_SLOTC3ROM (memmode & MF_SLOTC3ROM)
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#define SW_SLOTCXROM (memmode & MF_SLOTCXROM)
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#define SW_WRITERAM (memmode & MF_WRITERAM)
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//-----------------------------------------------------------------------------
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//static DWORD imagemode;
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static LPBYTE memshadow[0x100];
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LPBYTE memwrite[0x100];
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iofunction IORead[256];
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iofunction IOWrite[256];
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static LPVOID SlotParameters[NUM_SLOTS];
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//static BOOL fastpaging = 0; // Redundant: only ever set to 0, by MemSetFastPaging(0)
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//static DWORD image = 0;
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//static DWORD lastimage = 0;
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static BOOL lastwriteram = 0;
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LPBYTE mem = NULL;
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//
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static LPBYTE memaux = NULL;
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static LPBYTE memmain = NULL;
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LPBYTE memdirty = NULL;
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static LPBYTE memrom = NULL;
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static LPBYTE memimage = NULL;
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static LPBYTE pCxRomInternal = NULL;
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static LPBYTE pCxRomPeripheral = NULL;
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//
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static DWORD memmode = MF_BANK2 | MF_SLOTCXROM | MF_WRITERAM;
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static BOOL modechanging = 0;
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MemoryInitPattern_e g_eMemoryInitPattern = MIP_FF_FF_00_00;
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#ifdef RAMWORKS
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UINT g_uMaxExPages = 1; // user requested ram pages
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static LPBYTE RWpages[128]; // pointers to RW memory banks
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#endif
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BYTE /*__stdcall*/ IO_Annunciator(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCycles);
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static void UpdatePaging(BOOL initialize, BOOL updatewriteonly);
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//=============================================================================
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static BYTE /*__stdcall*/ IORead_C00x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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return KeybReadData(pc, addr, bWrite, d, nCyclesLeft);
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}
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static BYTE /*__stdcall*/ IOWrite_C00x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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if ((addr & 0xf) <= 0xB)
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return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft);
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else
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return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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}
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//-------------------------------------
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static BYTE /*__stdcall*/ IORead_C01x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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switch (addr & 0xf)
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{
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case 0x0: return KeybReadFlag(pc, addr, bWrite, d, nCyclesLeft);
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case 0x1: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x2: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x3: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x4: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x5: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x6: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x7: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x8: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x9: return VideoCheckVbl(pc, addr, bWrite, d, nCyclesLeft);
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case 0xA: return VideoCheckMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0xB: return VideoCheckMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0xC: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0xD: return MemCheckPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0xE: return VideoCheckMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0xF: return VideoCheckMode(pc, addr, bWrite, d, nCyclesLeft);
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}
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return 0;
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}
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static BYTE /*__stdcall*/ IOWrite_C01x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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return KeybReadFlag(pc, addr, bWrite, d, nCyclesLeft);
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}
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//-------------------------------------
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static BYTE /*__stdcall*/ IORead_C02x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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}
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static BYTE /*__stdcall*/ IOWrite_C02x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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}
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//-------------------------------------
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static BYTE /*__stdcall*/ IORead_C03x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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return SpkrToggle(pc, addr, bWrite, d, nCyclesLeft);
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}
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static BYTE /*__stdcall*/ IOWrite_C03x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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return SpkrToggle(pc, addr, bWrite, d, nCyclesLeft);
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}
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//-------------------------------------
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static BYTE /*__stdcall*/ IORead_C04x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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}
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static BYTE /*__stdcall*/ IOWrite_C04x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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}
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//-------------------------------------
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static BYTE /*__stdcall*/ IORead_C05x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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switch (addr & 0xf)
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{
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case 0x0: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0x1: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0x2: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0x3: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0x4: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x5: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x6: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x7: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x8: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0x9: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xA: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xB: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xC: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xD: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xE: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0xF: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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}
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return 0;
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}
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static BYTE /*__stdcall*/ IOWrite_C05x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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switch (addr & 0xf)
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{
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case 0x0: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0x1: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0x2: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0x3: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0x4: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x5: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x6: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x7: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft);
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case 0x8: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0x9: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xA: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xB: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xC: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xD: return IO_Annunciator(pc, addr, bWrite, d, nCyclesLeft);
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case 0xE: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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case 0xF: return VideoSetMode(pc, addr, bWrite, d, nCyclesLeft);
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}
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return 0;
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}
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//-------------------------------------
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static BYTE /*__stdcall*/ IORead_C06x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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switch (addr & 0xf)
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{
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case 0x0: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x1: return JoyReadButton(pc, addr, bWrite, d, nCyclesLeft);
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case 0x2: return JoyReadButton(pc, addr, bWrite, d, nCyclesLeft);
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case 0x3: return JoyReadButton(pc, addr, bWrite, d, nCyclesLeft);
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case 0x4: return JoyReadPosition(pc, addr, bWrite, d, nCyclesLeft);
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case 0x5: return JoyReadPosition(pc, addr, bWrite, d, nCyclesLeft);
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case 0x6: return JoyReadPosition(pc, addr, bWrite, d, nCyclesLeft);
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case 0x7: return JoyReadPosition(pc, addr, bWrite, d, nCyclesLeft);
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case 0x8: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x9: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xA: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xB: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xC: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xD: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xE: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xF: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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}
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return 0;
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}
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static BYTE /*__stdcall*/ IOWrite_C06x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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}
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//-------------------------------------
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static BYTE /*__stdcall*/ IORead_C07x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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switch (addr & 0xf)
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{
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case 0x0: return JoyResetPosition(pc, addr, bWrite, d, nCyclesLeft);
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case 0x1: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x2: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x3: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x4: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x5: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x6: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x7: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x8: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x9: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xA: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xB: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xC: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xD: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xE: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xF: return VideoCheckMode(pc, addr, bWrite, d, nCyclesLeft);
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}
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return 0;
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}
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static BYTE /*__stdcall*/ IOWrite_C07x(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
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{
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switch (addr & 0xf)
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{
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case 0x0: return JoyResetPosition(pc, addr, bWrite, d, nCyclesLeft);
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#ifdef RAMWORKS
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case 0x1: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft); // extended memory card set page
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case 0x2: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x3: return MemSetPaging(pc, addr, bWrite, d, nCyclesLeft); // Ramworks III set page
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#else
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case 0x1: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x2: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x3: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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#endif
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case 0x4: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x5: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x6: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x7: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x8: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0x9: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xA: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xB: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xC: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xD: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xE: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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case 0xF: return IO_Null(pc, addr, bWrite, d, nCyclesLeft);
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}
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return 0;
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}
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//-----------------------------------------------------------------------------
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static iofunction IORead_C0xx[8] =
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{
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IORead_C00x, // Keyboard
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IORead_C01x, // Memory/Video
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IORead_C02x, // Cassette
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IORead_C03x, // Speaker
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IORead_C04x,
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IORead_C05x, // Video
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IORead_C06x, // Joystick
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IORead_C07x, // Joystick/Video
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};
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static iofunction IOWrite_C0xx[8] =
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{
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IOWrite_C00x, // Memory/Video
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IOWrite_C01x, // Keyboard
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IOWrite_C02x, // Cassette
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IOWrite_C03x, // Speaker
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IOWrite_C04x,
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IOWrite_C05x, // Video/Memory
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IOWrite_C06x,
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IOWrite_C07x, // Joystick/Ramworks
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};
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static BYTE IO_SELECT;
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static BYTE IO_SELECT_InternalROM;
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static BYTE* ExpansionRom[NUM_SLOTS];
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enum eExpansionRomType {eExpRomNull=0, eExpRomInternal, eExpRomPeripheral};
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static eExpansionRomType g_eExpansionRomType = eExpRomNull;
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static UINT g_uPeripheralRomSlot = 0;
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//=============================================================================
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BYTE /*__stdcall*/ IO_Null(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCyclesLeft)
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{
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if (!write)
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return MemReadFloatingBus(nCyclesLeft);
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else
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return 0;
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}
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BYTE /*__stdcall*/ IO_Annunciator(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCyclesLeft)
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{
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// Apple//e ROM:
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// . PC=FA6F: LDA $C058 (SETAN0)
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// . PC=FA72: LDA $C05A (SETAN1)
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// . PC=C2B5: LDA $C05D (CLRAN2)
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// NB. AN3: For //e & //c these locations are now used to enabled/disabled DHIRES
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return 0;
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}
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// Enabling expansion ROM ($C800..$CFFF]:
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// . Enable if: Enable1 && Enable2
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// . Enable1 = I/O SELECT' (6502 accesses $Csxx)
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// - Reset when 6502 accesses $CFFF
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// . Enable2 = I/O STROBE' (6502 accesses [$C800..$CFFF])
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BYTE /*__stdcall*/ IORead_Cxxx(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCyclesLeft)
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{
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if (address == 0xCFFF)
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{
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// Disable expansion ROM at [$C800..$CFFF]
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// . SSC will disable on an access to $CFxx - but ROM only writes to $CFFF, so it doesn't matter
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IO_SELECT = 0;
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IO_SELECT_InternalROM = 0;
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g_uPeripheralRomSlot = 0;
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if (SW_SLOTCXROM)
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{
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// NB. SW_SLOTCXROM==0 ensures that internal rom stays switched in
|
|
memset(pCxRomPeripheral+0x800, 0, 0x800);
|
|
memset(mem+0xC800, 0, 0x800);
|
|
g_eExpansionRomType = eExpRomNull;
|
|
}
|
|
|
|
// NB. IO_SELECT won't get set, so ROM won't be switched back in...
|
|
}
|
|
|
|
//
|
|
|
|
BYTE IO_STROBE = 0;
|
|
|
|
if (IS_APPLE2 || SW_SLOTCXROM)
|
|
{
|
|
if ((address >= 0xC100) && (address <= 0xC7FF))
|
|
{
|
|
const UINT uSlot = (address >> 8) & 0xF;
|
|
if ((uSlot != 3) && ExpansionRom[uSlot])
|
|
IO_SELECT |= 1<<uSlot;
|
|
else if ((SW_SLOTC3ROM) && ExpansionRom[uSlot])
|
|
IO_SELECT |= 1<<uSlot; // Slot3 & Peripheral ROM
|
|
else if (!SW_SLOTC3ROM)
|
|
IO_SELECT_InternalROM = 1; // Slot3 & Internal ROM
|
|
}
|
|
else if ((address >= 0xC800) && (address <= 0xCFFF))
|
|
{
|
|
IO_STROBE = 1;
|
|
}
|
|
|
|
//
|
|
|
|
if (IO_SELECT && IO_STROBE)
|
|
{
|
|
// Enable Peripheral Expansion ROM
|
|
UINT uSlot=1;
|
|
for (; uSlot<NUM_SLOTS; uSlot++)
|
|
{
|
|
if (IO_SELECT & (1<<uSlot))
|
|
{
|
|
BYTE RemainingSelected = IO_SELECT & ~(1<<uSlot);
|
|
_ASSERT(RemainingSelected == 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ExpansionRom[uSlot] && (g_uPeripheralRomSlot != uSlot))
|
|
{
|
|
memcpy(pCxRomPeripheral+0x800, ExpansionRom[uSlot], 0x800);
|
|
memcpy(mem+0xC800, ExpansionRom[uSlot], 0x800);
|
|
g_eExpansionRomType = eExpRomPeripheral;
|
|
g_uPeripheralRomSlot = uSlot;
|
|
}
|
|
}
|
|
else if (IO_SELECT_InternalROM && IO_STROBE && (g_eExpansionRomType != eExpRomInternal))
|
|
{
|
|
// Enable Internal ROM
|
|
// . Get this for PR#3
|
|
memcpy(mem+0xC800, pCxRomInternal+0x800, 0x800);
|
|
g_eExpansionRomType = eExpRomInternal;
|
|
g_uPeripheralRomSlot = 0;
|
|
}
|
|
}
|
|
|
|
if (!IS_APPLE2 && !SW_SLOTCXROM)
|
|
{
|
|
// !SW_SLOTC3ROM = Internal ROM: $C300-C3FF
|
|
// !SW_SLOTCXROM = Internal ROM: $C100-CFFF
|
|
|
|
if ((address >= 0xC100) && (address <= 0xC7FF)) // Don't care about state of SW_SLOTC3ROM
|
|
IO_SELECT_InternalROM = 1;
|
|
else if ((address >= 0xC800) && (address <= 0xCFFF))
|
|
IO_STROBE = 1;
|
|
|
|
if (!SW_SLOTCXROM && IO_SELECT_InternalROM && IO_STROBE && (g_eExpansionRomType != eExpRomInternal))
|
|
{
|
|
// Enable Internal ROM
|
|
memcpy(mem+0xC800, pCxRomInternal+0x800, 0x800);
|
|
g_eExpansionRomType = eExpRomInternal;
|
|
g_uPeripheralRomSlot = 0;
|
|
}
|
|
}
|
|
|
|
if ((g_eExpansionRomType == eExpRomNull) && (address >= 0xC800))
|
|
return IO_Null(programcounter, address, write, value, nCyclesLeft);
|
|
else
|
|
return mem[address];
|
|
}
|
|
|
|
BYTE /*__stdcall*/ IOWrite_Cxxx(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCyclesLeft)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
static BYTE g_bmSlotInit = 0;
|
|
|
|
static void InitIoHandlers()
|
|
{
|
|
g_bmSlotInit = 0;
|
|
UINT i=0;
|
|
|
|
for (; i<8; i++) // C00x..C07x
|
|
{
|
|
IORead[i] = IORead_C0xx[i];
|
|
IOWrite[i] = IOWrite_C0xx[i];
|
|
}
|
|
|
|
for (; i<16; i++) // C08x..C0Fx
|
|
{
|
|
IORead[i] = IO_Null;
|
|
IOWrite[i] = IO_Null;
|
|
}
|
|
|
|
//
|
|
|
|
for (; i<256; i++) // C10x..CFFx
|
|
{
|
|
IORead[i] = IORead_Cxxx;
|
|
IOWrite[i] = IOWrite_Cxxx;
|
|
}
|
|
|
|
//
|
|
|
|
IO_SELECT = 0;
|
|
IO_SELECT_InternalROM = 0;
|
|
g_eExpansionRomType = eExpRomNull;
|
|
g_uPeripheralRomSlot = 0;
|
|
|
|
for (i=0; i<NUM_SLOTS; i++)
|
|
ExpansionRom[i] = NULL;
|
|
}
|
|
|
|
// All slots [0..7] must register their handlers
|
|
void RegisterIoHandler(UINT uSlot, iofunction IOReadC0, iofunction IOWriteC0, iofunction IOReadCx, iofunction IOWriteCx, LPVOID lpSlotParameter, BYTE* pExpansionRom)
|
|
{
|
|
_ASSERT(uSlot < NUM_SLOTS);
|
|
g_bmSlotInit |= 1<<uSlot;
|
|
SlotParameters[uSlot] = lpSlotParameter;
|
|
|
|
IORead[uSlot+8] = IOReadC0;
|
|
IOWrite[uSlot+8] = IOWriteC0;
|
|
|
|
if (uSlot == 0) // Don't trash C0xx handlers
|
|
return;
|
|
|
|
if (IOReadCx == NULL) IOReadCx = IORead_Cxxx;
|
|
if (IOWriteCx == NULL) IOWriteCx = IOWrite_Cxxx;
|
|
|
|
for (UINT i=0; i<16; i++)
|
|
{
|
|
IORead[uSlot*16+i] = IOReadCx;
|
|
IOWrite[uSlot*16+i] = IOWriteCx;
|
|
}
|
|
|
|
// What about [$C80x..$CFEx]? - Do any cards use this as I/O memory?
|
|
ExpansionRom[uSlot] = pExpansionRom;
|
|
// printf("RegisterIoHandler for slot %d finished!\n", uSlot);
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
//// Only called by MemSetFastPaging()
|
|
//void BackMainImage ()
|
|
//{
|
|
// for (UINT loop = 0; loop < 256; loop++)
|
|
// {
|
|
// if (memshadow[loop] && ((*(memdirty+loop) & 1) || (loop <= 1)))
|
|
// CopyMemory(memshadow[loop],memimage+(loop << 8),256);
|
|
//
|
|
// *(memdirty+loop) &= ~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);
|
|
// }
|
|
//}
|
|
|
|
//===========================================================================
|
|
|
|
static void UpdatePaging (BOOL initialize, BOOL updatewriteonly)
|
|
{
|
|
// SAVE THE CURRENT PAGING SHADOW TABLE
|
|
LPBYTE oldshadow[256];
|
|
if (!(initialize || updatewriteonly /*|| fastpaging*/ ))
|
|
CopyMemory(oldshadow,memshadow,256*sizeof(LPBYTE));
|
|
|
|
// UPDATE THE PAGING TABLES BASED ON THE NEW PAGING SWITCH VALUES
|
|
UINT loop;
|
|
if (initialize)
|
|
{
|
|
for (loop = 0x00; loop < 0xC0; loop++)
|
|
memwrite[loop] = mem+(loop << 8);
|
|
|
|
for (loop = 0xC0; loop < 0xD0; loop++)
|
|
memwrite[loop] = NULL;
|
|
}
|
|
|
|
if (!updatewriteonly)
|
|
{
|
|
for (loop = 0x00; loop < 0x02; loop++)
|
|
memshadow[loop] = SW_ALTZP ? memaux+(loop << 8) : memmain+(loop << 8);
|
|
}
|
|
|
|
for (loop = 0x02; loop < 0xC0; loop++)
|
|
{
|
|
memshadow[loop] = SW_AUXREAD ? memaux+(loop << 8)
|
|
: memmain+(loop << 8);
|
|
|
|
memwrite[loop] = ((SW_AUXREAD != 0) == (SW_AUXWRITE != 0))
|
|
? mem+(loop << 8)
|
|
: SW_AUXWRITE ? memaux+(loop << 8)
|
|
: memmain+(loop << 8);
|
|
}
|
|
|
|
if (!updatewriteonly)
|
|
{
|
|
for (loop = 0xC0; loop < 0xC8; loop++)
|
|
{
|
|
const UINT uSlotOffset = (loop & 0x0f) * 0x100;
|
|
if (loop == 0xC3)
|
|
memshadow[loop] = (SW_SLOTC3ROM && SW_SLOTCXROM) ? pCxRomPeripheral+uSlotOffset // C300..C3FF - Slot 3 ROM (all 0x00's)
|
|
: pCxRomInternal+uSlotOffset; // C300..C3FF - Internal ROM
|
|
else
|
|
memshadow[loop] = SW_SLOTCXROM ? pCxRomPeripheral+uSlotOffset // C000..C7FF - SSC/Disk][/etc
|
|
: pCxRomInternal+uSlotOffset; // C000..C7FF - Internal ROM
|
|
}
|
|
|
|
for (loop = 0xC8; loop < 0xD0; loop++)
|
|
{
|
|
const UINT uRomOffset = (loop & 0x0f) * 0x100;
|
|
memshadow[loop] = pCxRomInternal+uRomOffset; // C800..CFFF - Internal ROM
|
|
}
|
|
}
|
|
|
|
for (loop = 0xD0; loop < 0xE0; loop++)
|
|
{
|
|
int bankoffset = (SW_BANK2 ? 0 : 0x1000);
|
|
memshadow[loop] = SW_HIGHRAM ? SW_ALTZP ? memaux+(loop << 8)-bankoffset
|
|
: memmain+(loop << 8)-bankoffset
|
|
: memrom+((loop-0xD0) * 0x100);
|
|
|
|
memwrite[loop] = SW_WRITERAM ? SW_HIGHRAM ? mem+(loop << 8)
|
|
: SW_ALTZP ? memaux+(loop << 8)-bankoffset
|
|
: memmain+(loop << 8)-bankoffset
|
|
: NULL;
|
|
}
|
|
|
|
for (loop = 0xE0; loop < 0x100; loop++)
|
|
{
|
|
memshadow[loop] = SW_HIGHRAM ? SW_ALTZP ? memaux+(loop << 8)
|
|
: memmain+(loop << 8)
|
|
: memrom+((loop-0xD0) * 0x100);
|
|
|
|
memwrite[loop] = SW_WRITERAM ? SW_HIGHRAM ? mem+(loop << 8)
|
|
: SW_ALTZP ? memaux+(loop << 8)
|
|
: memmain+(loop << 8)
|
|
: NULL;
|
|
}
|
|
|
|
if (SW_80STORE)
|
|
{
|
|
for (loop = 0x04; loop < 0x08; loop++)
|
|
{
|
|
memshadow[loop] = SW_PAGE2 ? memaux+(loop << 8)
|
|
: memmain+(loop << 8);
|
|
memwrite[loop] = mem+(loop << 8);
|
|
}
|
|
|
|
if (SW_HIRES)
|
|
{
|
|
for (loop = 0x20; loop < 0x40; loop++)
|
|
{
|
|
memshadow[loop] = SW_PAGE2 ? memaux+(loop << 8)
|
|
: memmain+(loop << 8);
|
|
memwrite[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 = 0x00; loop < 0x100; loop++)
|
|
{
|
|
if (initialize || (oldshadow[loop] != memshadow[loop]))
|
|
{
|
|
if ((!(initialize/* || fastpaging*/)) &&
|
|
((*(memdirty+loop) & 1) || (loop <= 1)))
|
|
{
|
|
*(memdirty+loop) &= ~1;
|
|
CopyMemory(oldshadow[loop],mem+(loop << 8),256);
|
|
}
|
|
|
|
CopyMemory(mem+(loop << 8),memshadow[loop],256);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
//
|
|
// ----- ALL GLOBALLY ACCESSIBLE FUNCTIONS ARE BELOW THIS LINE -----
|
|
//
|
|
|
|
//===========================================================================
|
|
|
|
// TODO: >= Apple2e only?
|
|
BYTE /*__stdcall*/ MemCheckPaging (WORD, WORD address, BYTE, BYTE, ULONG)
|
|
{
|
|
address &= 0xFF;
|
|
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);
|
|
}
|
|
|
|
//===========================================================================
|
|
const unsigned int _6502_MEM_END = 0xFFFF; // define memory area
|
|
void MemDestroy ()
|
|
{
|
|
//if (fastpaging)
|
|
// MemSetFastPaging(0);
|
|
// VirtualFree(memimage,MAX(0x30000,0x10000*1),MEM_DECOMMIT);
|
|
|
|
VirtualFree(memaux ,0,MEM_RELEASE);
|
|
VirtualFree(memmain ,0,MEM_RELEASE);
|
|
VirtualFree(memdirty,0,MEM_RELEASE);
|
|
VirtualFree(memrom ,0,MEM_RELEASE);
|
|
munlock(memimage, _6502_MEM_END + 1); /* POSIX: unlock memory from swapping */
|
|
VirtualFree(memimage,0,MEM_RELEASE);
|
|
|
|
VirtualFree(pCxRomInternal,0,MEM_RELEASE);
|
|
VirtualFree(pCxRomPeripheral,0,MEM_RELEASE);
|
|
|
|
#ifdef RAMWORKS
|
|
for (UINT i=1; i<g_uMaxExPages; i++)
|
|
{
|
|
if (RWpages[i])
|
|
{
|
|
VirtualFree(RWpages[i], 0, MEM_RELEASE);
|
|
RWpages[i] = NULL;
|
|
}
|
|
}
|
|
RWpages[0]=NULL;
|
|
#endif
|
|
|
|
memaux = NULL;
|
|
memmain = NULL;
|
|
memdirty = NULL;
|
|
memrom = NULL;
|
|
memimage = NULL;
|
|
|
|
pCxRomInternal = NULL;
|
|
pCxRomPeripheral = NULL;
|
|
|
|
mem = NULL;
|
|
|
|
ZeroMemory(memwrite, sizeof(memwrite));
|
|
ZeroMemory(memshadow,sizeof(memshadow));
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
bool MemGet80Store()
|
|
{
|
|
return SW_80STORE != 0;
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
bool MemCheckSLOTCXROM()
|
|
{
|
|
return SW_SLOTCXROM ? true : false;
|
|
}
|
|
|
|
//===========================================================================
|
|
LPBYTE MemGetAuxPtr (WORD offset)
|
|
{
|
|
LPBYTE lpMem = (memshadow[(offset >> 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[(offset >> 8)] == (RWpages[0]+(offset & 0xFF00)))
|
|
? mem+offset
|
|
: RWpages[0]+offset;
|
|
}
|
|
#endif
|
|
|
|
return lpMem;
|
|
}
|
|
|
|
//===========================================================================
|
|
LPBYTE MemGetMainPtr (WORD offset)
|
|
{
|
|
return (memshadow[(offset >> 8)] == (memmain+(offset & 0xFF00)))
|
|
? mem+offset
|
|
: memmain+offset;
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
LPBYTE MemGetCxRomPeripheral()
|
|
{
|
|
return pCxRomPeripheral;
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
void MemPreInitialize ()
|
|
{
|
|
// Init the I/O handlers
|
|
InitIoHandlers();
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
int MemInitialize() // returns -1 if any eror during initialization
|
|
{
|
|
const UINT CxRomSize = 4*1024;
|
|
const UINT Apple2RomSize = 12*1024;
|
|
const UINT Apple2eRomSize = Apple2RomSize+CxRomSize;
|
|
|
|
// ALLOCATE MEMORY FOR THE APPLE MEMORY IMAGE AND ASSOCIATED DATA STRUCTURES
|
|
memaux = (LPBYTE)VirtualAlloc(NULL,_6502_MEM_END+1,MEM_COMMIT,PAGE_READWRITE);
|
|
memmain = (LPBYTE)VirtualAlloc(NULL,_6502_MEM_END+1,MEM_COMMIT,PAGE_READWRITE);
|
|
memdirty = (LPBYTE)VirtualAlloc(NULL,0x100 ,MEM_COMMIT,PAGE_READWRITE);
|
|
memrom = (LPBYTE)VirtualAlloc(NULL,0x5000 ,MEM_COMMIT,PAGE_READWRITE);
|
|
// // THE MEMIMAGE BUFFER CAN CONTAIN EITHER MULTIPLE MEMORY IMAGES OR ONE MEMORY IMAGE WITH COMPILER DATA
|
|
// memimage = (LPBYTE)VirtualAlloc(NULL,
|
|
// MAX(0x30000,MAXIMAGES*0x10000),
|
|
// MEM_RESERVE,PAGE_NOACCESS);
|
|
memimage =
|
|
(LPBYTE)VirtualAlloc(NULL,_6502_MEM_END + 1,/*MEM_RESERVE*/MEM_COMMIT,/*PAGE_NOACCESS*/PAGE_READWRITE);
|
|
|
|
/* POSIX : lock memory from swapping */
|
|
mlock(memimage, _6502_MEM_END + 1);
|
|
|
|
pCxRomInternal = (LPBYTE) VirtualAlloc(NULL, CxRomSize, MEM_COMMIT, PAGE_READWRITE);
|
|
pCxRomPeripheral = (LPBYTE) VirtualAlloc(NULL, CxRomSize, MEM_COMMIT, PAGE_READWRITE);
|
|
|
|
if (!memaux || !memdirty || !memimage || !memmain || !memrom || !pCxRomInternal || !pCxRomPeripheral)
|
|
{
|
|
/* MessageBox(
|
|
GetDesktopWindow(),
|
|
TEXT("The emulator was unable to allocate the memory it ")
|
|
TEXT("requires. Further execution is not possible."),
|
|
g_pAppTitle,
|
|
MB_ICONSTOP | MB_SETFOREGROUND);
|
|
ExitProcess(1);*/
|
|
fprintf(stderr, "Unable to allocate required memory. Sorry.\n");
|
|
return -1;
|
|
}
|
|
|
|
// LPVOID newloc = VirtualAlloc(memimage,0x30000,MEM_COMMIT,PAGE_READWRITE);
|
|
// LPVOID newloc = VirtualAlloc(memimage,_6502_MEM_END+1,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."),
|
|
// g_pAppTitle,
|
|
// 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,_6502_MEM_END+1,MEM_COMMIT,PAGE_READWRITE)))
|
|
i++;
|
|
#endif
|
|
|
|
// READ THE APPLE FIRMWARE ROMS INTO THE ROM IMAGE
|
|
#define IDR_APPLE2_ROM "Apple2.rom"
|
|
#define IDR_APPLE2_PLUS_ROM "Apple2_Plus.rom"
|
|
#define IDR_APPLE2E_ROM "Apple2e.rom"
|
|
#define IDR_APPLE2E_ENHANCED_ROM "Apple2e_Enhanced.rom"
|
|
|
|
|
|
|
|
UINT ROM_SIZE = 0;
|
|
char * RomFileName = NULL;
|
|
// HRSRC hResInfo = NULL;
|
|
switch (g_Apple2Type)
|
|
{
|
|
case A2TYPE_APPLE2: RomFileName = Apple2_rom; ROM_SIZE = Apple2RomSize; break;
|
|
case A2TYPE_APPLE2PLUS:RomFileName = Apple2plus_rom; ROM_SIZE = Apple2RomSize; break;
|
|
case A2TYPE_APPLE2E:RomFileName = Apple2e_rom; ROM_SIZE = Apple2eRomSize; break;
|
|
case A2TYPE_APPLE2EEHANCED:RomFileName = Apple2eEnhanced_rom; ROM_SIZE = Apple2eRomSize; break;
|
|
/*case A2TYPE_PRAVEC8C:RomFileName = IDR_PRAVEC_8C; ROM_SIZE = Apple2Pravec8CSize;break;*/
|
|
}
|
|
|
|
if(RomFileName == NULL)
|
|
{
|
|
/* TCHAR sRomFileName[ MAX_PATH ];
|
|
switch (g_Apple2Type)
|
|
{
|
|
case A2TYPE_APPLE2: _tcscpy(sRomFileName, TEXT("APPLE2.ROM")); break;
|
|
case A2TYPE_APPLE2PLUS: _tcscpy(sRomFileName, TEXT("APPLE2_PLUS.ROM")); break;
|
|
case A2TYPE_APPLE2E: _tcscpy(sRomFileName, TEXT("APPLE2E.ROM")); break;
|
|
case A2TYPE_APPLE2EEHANCED: _tcscpy(sRomFileName, TEXT("APPLE2E_ENHANCED.ROM")); break;
|
|
}
|
|
|
|
TCHAR sText[ MAX_PATH ];
|
|
wsprintf( sText, TEXT("Unable to open the required firmware ROM data file.\n\nFile: %s"), sRomFileName );
|
|
|
|
MessageBox(
|
|
GetDesktopWindow(),
|
|
sText,
|
|
g_pAppTitle,
|
|
MB_ICONSTOP | MB_SETFOREGROUND);
|
|
ExitProcess(1);*/
|
|
// could not find any suitable rom??
|
|
fprintf(stderr, "Unable to find rom for specified computer type! Sorry\n");
|
|
return -1;
|
|
}
|
|
|
|
/* void * BUFFER = malloc(ROM_SIZE);
|
|
if(BUFFER == NULL) {
|
|
fprintf(stderr, "Unable to allocate %d bytes of memory for ROM.\n", ROM_SIZE);
|
|
return -1;
|
|
}
|
|
FILE * romfile;
|
|
romfile = fopen(RomFileName, "rb");
|
|
if(romfile == NULL) {
|
|
fprintf(stderr, "Unable to open %s ROM file\n", RomFileName);
|
|
free(BUFFER);
|
|
return -1;
|
|
}
|
|
if(GetFileSize(romfile, NULL) != ROM_SIZE) {
|
|
fprintf(stderr, "Size of %s ROM file mismatch required %d\n", RomFileName, ROM_SIZE);
|
|
fclose(romfile);
|
|
free(BUFFER);
|
|
return -1;
|
|
}
|
|
UINT nbytes = fread(BUFFER, 1, ROM_SIZE, romfile);
|
|
fclose(romfile);
|
|
if(nbytes != ROM_SIZE) {
|
|
fprintf(stderr, "Size of %s ROM file mismatches required %d bytes\n", RomFileName, ROM_SIZE);
|
|
free(BUFFER);
|
|
return -1; // have not read enough?
|
|
}
|
|
*/
|
|
|
|
|
|
|
|
// DWORD dwResSize = SizeofResource(NULL, hResInfo);
|
|
// if(dwResSize != ROM_SIZE)
|
|
// return;
|
|
//
|
|
// HGLOBAL hResData = LoadResource(NULL, hResInfo);
|
|
// if(hResData == NULL)
|
|
// return;
|
|
|
|
BYTE* pData = (BYTE*) RomFileName; // NB. Don't need to unlock resource
|
|
/* if (pData == NULL)
|
|
return;
|
|
*/
|
|
//
|
|
|
|
memset(pCxRomInternal,0,CxRomSize);
|
|
memset(pCxRomPeripheral,0,CxRomSize);
|
|
|
|
if (ROM_SIZE == Apple2eRomSize)
|
|
{
|
|
memcpy(pCxRomInternal, pData, CxRomSize);
|
|
pData += CxRomSize;
|
|
ROM_SIZE -= CxRomSize;
|
|
}
|
|
|
|
_ASSERT(ROM_SIZE == Apple2RomSize);
|
|
memcpy(memrom, pData, Apple2RomSize); // ROM at $D000...$FFFF
|
|
// free(BUFFER);
|
|
//
|
|
|
|
const UINT uSlot = 0;
|
|
RegisterIoHandler(uSlot, MemSetPaging, MemSetPaging, NULL, NULL, NULL, NULL);
|
|
// printf("Apple ROM loaded and registered\n");
|
|
|
|
PrintLoadRom(pCxRomPeripheral, 1); // $C100 : Parallel printer f/w
|
|
sg_SSC.CommInitialize(pCxRomPeripheral, 2); // $C200 : SSC
|
|
if (g_Slot4 == CT_MouseInterface)
|
|
sg_Mouse.Initialize(pCxRomPeripheral, 4); // $C400 : Mouse f/w
|
|
DiskLoadRom(pCxRomPeripheral, 6); // $C600 : Disk][ f/w
|
|
HD_Load_Rom(pCxRomPeripheral, 7); // $C700 : HDD f/w
|
|
|
|
MemReset();
|
|
return 0; // all is OK??
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
// Called by:
|
|
// . MemInitialize()
|
|
// . 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,256*sizeof(LPBYTE));
|
|
ZeroMemory(memwrite ,256*sizeof(LPBYTE));
|
|
|
|
// INITIALIZE THE RAM IMAGES
|
|
ZeroMemory(memaux ,0x10000);
|
|
|
|
ZeroMemory(memmain,0x10000);
|
|
|
|
int iByte;
|
|
|
|
if (g_eMemoryInitPattern == MIP_FF_FF_00_00)
|
|
{
|
|
for( iByte = 0x0000; iByte < 0xC000; )
|
|
{
|
|
memmain[ iByte++ ] = 0xFF;
|
|
memmain[ iByte++ ] = 0xFF;
|
|
|
|
iByte++;
|
|
iByte++;
|
|
}
|
|
}
|
|
|
|
// SET UP THE MEMORY IMAGE
|
|
mem = memimage;
|
|
//image = 0;
|
|
|
|
// INITIALIZE PAGING, FILLING IN THE 64K MEMORY IMAGE
|
|
ResetPaging(1);
|
|
|
|
// INITIALIZE & RESET THE CPU
|
|
// . Do this after ROM has been copied back to mem[], so that PC is correctly init'ed from 6502's reset vector
|
|
CpuInitialize();
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
// Call by:
|
|
// . Soft-reset (Ctrl+Reset)
|
|
// . Snapshot_LoadState()
|
|
void MemResetPaging ()
|
|
{
|
|
ResetPaging(0);
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
// Called by Disk][ I/O only
|
|
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);
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
BYTE MemReadFloatingBus(const ULONG uExecutedCycles)
|
|
{
|
|
return*(LPBYTE)(mem + VideoGetScannerAddress(NULL, uExecutedCycles));
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
BYTE MemReadFloatingBus(const BYTE highbit, const ULONG uExecutedCycles)
|
|
{
|
|
BYTE r = *(LPBYTE)(mem + VideoGetScannerAddress(NULL, uExecutedCycles));
|
|
return (r & ~0x80) | ((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);
|
|
//}
|
|
|
|
//===========================================================================
|
|
BYTE /*__stdcall*/ MemSetPaging (WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCyclesLeft)
|
|
{
|
|
address &= 0xFF;
|
|
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 (!IS_APPLE2)
|
|
{
|
|
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);
|
|
}
|
|
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 : MemReadFloatingBus(1, nCyclesLeft);
|
|
}
|
|
if ((address >= 0x80) && (address <= 0x8F) && (programcounter < 0xC000) &&
|
|
(((*(LPDWORD)(mem+programcounter) & 0x00FFFEFF) == 0x00C0048D) ||
|
|
((*(LPDWORD)(mem+programcounter) & 0x00FFFEFF) == 0x00C0028D))) {
|
|
modechanging = 1;
|
|
return write ? 0 : MemReadFloatingBus(1, nCyclesLeft);
|
|
}
|
|
|
|
// IF THE MEMORY PAGING MODE HAS CHANGED, UPDATE OUR MEMORY IMAGES AND
|
|
// WRITE TABLES.
|
|
if ((lastmemmode != memmode) || modechanging)
|
|
{
|
|
modechanging = 0;
|
|
|
|
if ((lastmemmode & MF_SLOTCXROM) != (memmode & MF_SLOTCXROM))
|
|
{
|
|
if (SW_SLOTCXROM)
|
|
{
|
|
// Disable Internal ROM
|
|
// . Similar to $CFFF access
|
|
// . None of the peripheral cards can be driving the bus - so use the null ROM
|
|
memset(pCxRomPeripheral+0x800, 0, 0x800);
|
|
memset(mem+0xC800, 0, 0x800);
|
|
g_eExpansionRomType = eExpRomNull;
|
|
g_uPeripheralRomSlot = 0;
|
|
}
|
|
else
|
|
{
|
|
// Enable Internal ROM
|
|
memcpy(mem+0xC800, pCxRomInternal+0x800, 0x800);
|
|
g_eExpansionRomType = eExpRomInternal;
|
|
g_uPeripheralRomSlot = 0;
|
|
}
|
|
}
|
|
|
|
//// 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 ((address <= 1) || ((address >= 0x54) && (address <= 0x57)))
|
|
return VideoSetMode(programcounter,address,write,value,nCyclesLeft);
|
|
|
|
return write ? 0 : MemReadFloatingBus(nCyclesLeft);
|
|
}
|
|
|
|
//===========================================================================
|
|
//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];
|
|
// }
|
|
// if (++trimnumber >= lastimage)
|
|
// trimnumber = 0;
|
|
// }
|
|
//}
|
|
|
|
//===========================================================================
|
|
|
|
LPVOID MemGetSlotParameters (UINT uSlot)
|
|
{
|
|
_ASSERT(uSlot < NUM_SLOTS);
|
|
return SlotParameters[uSlot];
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
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);
|
|
|
|
//
|
|
|
|
modechanging = 0;
|
|
|
|
UpdatePaging(1,0); // Initialize=1, UpdateWriteOnly=0
|
|
|
|
return 0;
|
|
}
|