126 lines
3.4 KiB
C++
Executable File
126 lines
3.4 KiB
C++
Executable File
/*
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* (C) 2009 A. Carl Douglas. All rights reserved.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "Cartridge.h"
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Cartridge::Cartridge()
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{
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data = NULL;
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dealloc();
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}
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Cartridge::~Cartridge()
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{
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dealloc();
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}
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void
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Cartridge::dealloc()
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{
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if (data) {
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free(data);
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data = NULL;
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}
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for (unsigned i = 0; i < 64; i++)
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chips[i] = NULL;
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numberOfChips = 0;
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}
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bool
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Cartridge::isCRTFile(const char *filename)
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{
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int magic_bytes[] = { 'C','6','4',' ','C','A','R','T','R','I','D','G','E',' ',' ',' ',EOF };
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assert(filename != NULL);
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if (!checkFileSuffix(filename, ".CRT") && !checkFileSuffix(filename, ".crt"))
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return false;
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if (!checkFileSize(filename, 0x40, -1))
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return false;
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if (!checkFileHeader(filename, magic_bytes))
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return false;
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return true;
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}
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Cartridge *
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Cartridge::cartridgeFromFile(const char *filename)
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{
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Cartridge *cartridge;
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cartridge = new Cartridge();
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if (!cartridge->readFromFile(filename)) {
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delete cartridge;
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cartridge = NULL;
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}
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return cartridge;
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}
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bool
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Cartridge::readFromBuffer(const uint8_t *buffer, unsigned length)
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{
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if ((data = (uint8_t *)malloc(length)) == NULL) {
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return false;
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}
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memcpy(data, buffer, length);
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// Scan cartridge header
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if (memcmp("C64 CARTRIDGE ", data, 16) != 0) {
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fprintf(stderr, "Bad cartridge signature. Expected 'C64 CARTRIDGE ', got ...\n");
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printReadable(&data[0], 16);
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return false;
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}
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// Cartridge header size
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uint32_t headerSize = HI_HI_LO_LO(data[0x10],data[0x11],data[0x12],data[0x13]);
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// Minimum header size is 0x40. Some cartridges show a value of 0x20 which is wrong.
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if (headerSize < 0x40) headerSize = 0x40;
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fprintf(stderr, "Cartridge: %s\n", getCartridgeName());
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fprintf(stderr, " Header: %08X bytes long (normally 0x40)\n", headerSize);
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fprintf(stderr, " Type: %d\n", getCartridgeType());
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fprintf(stderr, " Game: %d\n", getGameLine());
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fprintf(stderr, " Exrom: %d\n", getExromLine());
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// Load chip packets
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uint8_t *ptr = &data[headerSize];
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for (numberOfChips = 0; ptr < data + length; numberOfChips++) {
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if (memcmp("CHIP", ptr, 4) != 0) {
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fprintf(stderr, "Unexpected data in cartridge, expected 'CHIP'\n");
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printReadable(ptr, 4);
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return false;
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}
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// Remember start address of each chip section
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chips[numberOfChips] = ptr;
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ptr += 0x10;
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ptr += getChipSize(numberOfChips);
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}
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fprintf(stderr, "CRT container imported successfully (%d chips)\n", numberOfChips);
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return true;
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}
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