mirror of
https://github.com/dingusdev/dingusppc.git
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151 lines
4.6 KiB
C++
151 lines
4.6 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-20 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** @file Factory for creating different machines.
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Author: Max Poliakovski
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*/
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#include <map>
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#include <cinttypes>
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#include <cstring>
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#include <iostream>
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#include <fstream>
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#include <thirdparty/loguru/loguru.hpp>
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#include "memreadwrite.h"
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#include "machinefactory.h"
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#include "devices/memctrlbase.h"
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using namespace std;
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/**
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Power Macintosh ROM identification string
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is located in the ConfigInfo structure starting at 0x30D064 (PCI Macs)
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or 0x30C064 (Nubus Macs).
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*/
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static const map<uint32_t, string> rom_identity = {
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{0x416C6368, "Performa 6400"}, //Alchemy
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//{"Come", "PowerBook 2400"}, //Comet
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{0x436F7264, "Power Mac 5200/6200 series"}, //Cordyceps
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{0x47617A65, "Power Mac 6500"}, //Gazelle
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{0x476F7373, "Power Mac G3 Beige"}, //Gossamer
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{0x47525820, "PowerBook G3 Wallstreet"},
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//{"Hoop", "PowerBook 3400"}, //Hooper
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{0x50425820, "PowerBook Pre-G3"},
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{0x50444D20, "Nubus Power Mac or WGS"}, //Piltdown Man (6100/7100/8100)
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{0x50697020, "Bandai Pippin"}, //Pippin
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//{"Powe", "Generic Power Mac"}, //PowerMac?
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//{"Spar", "20th Anniversay Mac"}, //Spartacus
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{0x544E5420, "Power Mac 7xxxx/8xxx series"}, //Trinitrotoluene :-)
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{0x5A616E7A, "Power Mac 4400/7220"}, //Zanzibar
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//{"????", "A clone, perhaps?"} //N/A (Placeholder ID)
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};
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int create_machine_for_id(uint32_t id)
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{
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switch(id) {
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case 0x476F7373:
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create_gossamer();
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break;
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default:
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LOG_F(ERROR, "Unknown machine ID: %X", id);
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return -1;
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}
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return 0;
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}
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/* Read ROM file content and transfer it to the dedicated ROM region */
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void load_rom(ifstream& rom_file, uint32_t file_size)
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{
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unsigned char *sysrom_mem = new unsigned char[file_size];
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rom_file.seekg(0, ios::beg);
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rom_file.read((char *)sysrom_mem, file_size);
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MemCtrlBase *mem_ctrl = dynamic_cast<MemCtrlBase *>
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(gMachineObj->get_comp_by_type(HWCompType::MEM_CTRL));
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mem_ctrl->set_data(0xFFC00000, sysrom_mem, file_size);
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delete[] sysrom_mem;
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}
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int create_machine_for_rom(const char* rom_filepath)
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{
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ifstream rom_file;
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int result;
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uint32_t file_size, config_info_offset, rom_id;
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char rom_id_str[17];
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rom_file.open(rom_filepath, ios::in|ios::binary);
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if (rom_file.fail()) {
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LOG_F(ERROR, "Cound not open the specified ROM file.");
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rom_file.close();
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return -1;
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}
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rom_file.seekg(0, rom_file.end);
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file_size = rom_file.tellg();
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rom_file.seekg(0, rom_file.beg);
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if (file_size != 0x400000UL){
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LOG_F(ERROR, "Unxpected ROM File size. Expected size is 4 megabytes.");
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rom_file.close();
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return -1;
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}
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/* read config info offset from file */
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config_info_offset = 0;
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rom_file.seekg(0x300080, ios::beg);
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rom_file.read((char *)&config_info_offset, 4);
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config_info_offset = READ_DWORD_BE_A(&config_info_offset);
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/* rewind to ConfigInfo.BootstrapVersion field */
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rom_file.seekg(0x300064 + config_info_offset, ios::beg);
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/* read BootstrapVersion as C string */
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rom_file.read(rom_id_str, 16);
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rom_id_str[16] = 0;
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LOG_F(INFO, "ROM BootstrapVersion: %s", rom_id_str);
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if (strncmp(rom_id_str, "Boot", 4) != 0) {
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LOG_F(ERROR, "Invalid BootstrapVersion string.");
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rom_file.close();
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return -1;
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}
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/* convert BootstrapVersion string to ROM ID */
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rom_id = (rom_id_str[5] << 24) | (rom_id_str[6] << 16) |
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(rom_id_str[7] << 8) | rom_id_str[8];
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LOG_F(INFO, "The machine is identified as... %s\n", rom_identity.at(rom_id).c_str());
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create_machine_for_id(rom_id);
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load_rom(rom_file, file_size);
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rom_file.close();
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return 0;
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}
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