145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/*****************************************************************************
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** $Source: /cygdrive/d/Private/_SVNROOT/bluemsx/blueMSX/Src/Memory/romMapperMicrosolVmx80.c,v $
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**
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** $Revision: 1.10 $
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**
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** $Date: 2008-03-31 19:42:22 $
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**
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** More info: http://www.bluemsx.com
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**
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** Copyright (C) 2003-2006 Daniel Vik, Tomas Karlsson
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**
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** This program 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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**
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** This program 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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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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**
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******************************************************************************
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*/
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#include "romMapperMicrosolVmx80.h"
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#include "MediaDb.h"
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#include "SlotManager.h"
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#include "DeviceManager.h"
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#include "SaveState.h"
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#include "CRTC6845.h"
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#include "RomLoader.h"
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#include <stdlib.h>
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#include <string.h>
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typedef struct {
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int deviceHandle;
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UInt8* romData;
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UInt8* charData;
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int slot;
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int sslot;
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int startPage;
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CRTC6845* crtc6845;
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} RomMapperMicrosolVmx80;
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static void saveState(RomMapperMicrosolVmx80* rm)
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{
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SaveState* state = saveStateOpenForWrite("Vmx80");
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saveStateClose(state);
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}
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static void loadState(RomMapperMicrosolVmx80* rm)
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{
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SaveState* state = saveStateOpenForRead("Vmx80");
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saveStateClose(state);
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}
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static void destroy(RomMapperMicrosolVmx80* rm)
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{
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slotUnregister(rm->slot, rm->sslot, rm->startPage);
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deviceManagerUnregister(rm->deviceHandle);
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free(rm->romData);
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free(rm->charData);
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free(rm);
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}
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static UInt8 read(RomMapperMicrosolVmx80* rm, UInt16 address)
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{
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if (address == 0x3001) {
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return crtcRead(rm->crtc6845);
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}
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if (address > 0x1fff && address < 0x2800) {
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return crtcMemRead(rm->crtc6845, address & 0x07ff);
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}
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return address < 0x4000 ? rm->romData[address] : 0xff;
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}
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static void write(RomMapperMicrosolVmx80* rm, UInt16 address, UInt8 value)
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{
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if (address >= 0x2000 && address < 0x2800) {
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crtcMemWrite(rm->crtc6845, address & 0x07ff, value);
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}
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if (address >= 0x3000 && address < 0x3800) {
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if (address & 1) {
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crtcWrite(rm->crtc6845, value);
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}
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else {
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crtcWriteLatch(rm->crtc6845, value);
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}
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}
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}
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static void reset(RomMapperMicrosolVmx80* rm)
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{
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}
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int romMapperMicrosolVmx80Create(const char* filename, UInt8* romData, int size,
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int slot, int sslot, int startPage,
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void* charRom, int charSize)
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{
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DeviceCallbacks callbacks = { destroy, reset, saveState, loadState };
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RomMapperMicrosolVmx80* rm;
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int pages = 2;
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int i;
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if ((startPage + pages) > 8) {
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return 0;
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}
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rm = malloc(sizeof(RomMapperMicrosolVmx80));
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rm->deviceHandle = deviceManagerRegister(ROM_MICROSOL80, &callbacks, rm);
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slotRegister(slot, sslot, startPage, 2, read, read, write, destroy, rm);
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rm->charData = calloc(1, 0x2000);
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if (charRom != NULL) {
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if (charSize > 0x2000) {
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charSize = 0x2000;
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}
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memcpy(rm->charData, charRom, charSize);
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}
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rm->crtc6845 = NULL;
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rm->crtc6845 = crtc6845Create(50, rm->charData, charSize, 0x0800, 7, 0, 80, 4);
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rm->romData = calloc(1, size);
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memcpy(rm->romData, romData, size);
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rm->slot = slot;
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rm->sslot = sslot;
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rm->startPage = startPage;
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for (i = 0; i < pages; i++) {
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slotMapPage(slot, sslot, i + startPage, NULL, 0, 0);
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}
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reset(rm);
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return 1;
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}
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