mirror of
https://github.com/DerKoun/bsnes-hd.git
synced 2025-04-02 10:52:49 -04:00
755 lines
No EOL
23 KiB
C++
755 lines
No EOL
23 KiB
C++
#include <emulator/emulator.hpp>
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#include <sfc/interface/interface.hpp>
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#include <filter/filter.hpp>
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#include <lzma/lzma.hpp>
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#include <nall/directory.hpp>
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#include <nall/instance.hpp>
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#include <nall/decode/rle.hpp>
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#include <nall/decode/zip.hpp>
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#include <nall/encode/rle.hpp>
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#include <nall/encode/zip.hpp>
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#include <nall/hash/crc16.hpp>
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using namespace nall;
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#include <heuristics/heuristics.hpp>
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#include <heuristics/heuristics.cpp>
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#include <heuristics/super-famicom.cpp>
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#include <heuristics/game-boy.cpp>
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#include <heuristics/bs-memory.cpp>
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#include "resources.hpp"
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static Emulator::Interface *emulator;
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struct Program : Emulator::Platform
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{
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Program();
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~Program();
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auto open(uint id, string name, vfs::file::mode mode, bool required) -> shared_pointer<vfs::file> override;
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auto load(uint id, string name, string type, vector<string> options = {}) -> Emulator::Platform::Load override;
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auto videoFrame(const uint32* data, uint pitch, uint width, uint height, uint scale) -> void override;
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auto audioFrame(const double* samples, uint channels) -> void override;
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auto inputPoll(uint port, uint device, uint input) -> int16 override;
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auto inputRumble(uint port, uint device, uint input, bool enable) -> void override;
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auto load() -> void;
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auto loadFile(string location) -> vector<uint8_t>;
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auto loadSuperFamicom(string location) -> bool;
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auto loadGameBoy(string location) -> bool;
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auto loadBSMemory(string location) -> bool;
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auto save() -> void;
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auto openRomSuperFamicom(string name, vfs::file::mode mode) -> shared_pointer<vfs::file>;
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auto openRomGameBoy(string name, vfs::file::mode mode) -> shared_pointer<vfs::file>;
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auto openRomBSMemory(string name, vfs::file::mode mode) -> shared_pointer<vfs::file>;
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auto hackPatchMemory(vector<uint8_t>& data) -> void;
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string base_name;
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bool overscan = false;
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bool aspectcorrection = false;
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uint ws = 0;
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uint scale = 1;
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public:
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struct Game {
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explicit operator bool() const { return (bool)location; }
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string option;
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string location;
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string manifest;
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Markup::Node document;
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boolean patched;
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boolean verified;
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};
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struct SuperFamicom : Game {
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string title;
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string region;
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vector<uint8_t> program;
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vector<uint8_t> data;
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vector<uint8_t> expansion;
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vector<uint8_t> firmware;
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} superFamicom;
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struct GameBoy : Game {
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vector<uint8_t> program;
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} gameBoy;
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struct BSMemory : Game {
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vector<uint8_t> program;
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} bsMemory;
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};
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static Program *program = nullptr;
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Program::Program()
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{
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Emulator::platform = this;
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}
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Program::~Program()
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{
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delete emulator;
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}
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auto Program::save() -> void
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{
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if(!emulator->loaded()) return;
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emulator->save();
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}
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auto Program::open(uint id, string name, vfs::file::mode mode, bool required) -> shared_pointer<vfs::file>
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{
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shared_pointer<vfs::file> result;
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if (name == "ipl.rom" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(iplrom, sizeof(iplrom));
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}
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if (name == "boards.bml" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(Boards, sizeof(Boards));
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}
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if (id == 1) { //Super Famicom
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if (name == "manifest.bml" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(superFamicom.manifest.data<uint8_t>(), superFamicom.manifest.size());
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}
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else if (name == "program.rom" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(superFamicom.program.data(), superFamicom.program.size());
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}
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else if (name == "data.rom" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(superFamicom.data.data(), superFamicom.data.size());
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}
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else if (name == "expansion.rom" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(superFamicom.expansion.data(), superFamicom.expansion.size());
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}
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else {
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result = openRomSuperFamicom(name, mode);
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}
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}
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else if (id == 2) { //Game Boy
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if (name == "manifest.bml" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(gameBoy.manifest.data<uint8_t>(), gameBoy.manifest.size());
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}
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else if (name == "program.rom" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(gameBoy.program.data(), gameBoy.program.size());
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}
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else {
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result = openRomGameBoy(name, mode);
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}
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}
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else if (id == 3) { //BS Memory
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if (name == "manifest.bml" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(bsMemory.manifest.data<uint8_t>(), bsMemory.manifest.size());
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}
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else if (name == "program.rom" && mode == vfs::file::mode::read) {
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result = vfs::memory::file::open(bsMemory.program.data(), bsMemory.program.size());
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}
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else if(name == "program.flash") {
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//writes are not flushed to disk in bsnes
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result = vfs::memory::file::open(bsMemory.program.data(), bsMemory.program.size());
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}
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else {
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result = openRomBSMemory(name, mode);
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}
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}
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return result;
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}
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auto Program::load() -> void {
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emulator->unload();
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emulator->load();
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// per-game hack overrides
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auto title = superFamicom.title;
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auto region = superFamicom.region;
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//sometimes menu options are skipped over in the main menu with cycle-based joypad polling
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if(title == "Arcades Greatest Hits") emulator->configure("Hacks/CPU/FastJoypadPolling", true);
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//the start button doesn't work in this game with cycle-based joypad polling
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if(title == "TAIKYOKU-IGO Goliath") emulator->configure("Hacks/CPU/FastJoypadPolling", true);
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//holding up or down on the menu quickly cycles through options instead of stopping after each button press
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if(title == "WORLD MASTERS GOLF") emulator->configure("Hacks/CPU/FastJoypadPolling", true);
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//relies on mid-scanline rendering techniques
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if(title == "AIR STRIKE PATROL" || title == "DESERT FIGHTER") emulator->configure("Hacks/PPU/Fast", false);
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//the dialogue text is blurry due to an issue in the scanline-based renderer's color math support
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if(title == "マーヴェラス") emulator->configure("Hacks/PPU/Fast", false);
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//stage 2 uses pseudo-hires in a way that's not compatible with the scanline-based renderer
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if(title == "SFC クレヨンシンチャン") emulator->configure("Hacks/PPU/Fast", false);
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//title screen game select (after choosing a game) changes OAM tiledata address mid-frame
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//this is only supported by the cycle-based PPU renderer
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if(title == "Winter olympics") emulator->configure("Hacks/PPU/Fast", false);
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//title screen shows remnants of the flag after choosing a language with the scanline-based renderer
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if(title == "WORLD CUP STRIKER") emulator->configure("Hacks/PPU/Fast", false);
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//relies on cycle-accurate writes to the echo buffer
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if(title == "KOUSHIEN_2") emulator->configure("Hacks/DSP/Fast", false);
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//will hang immediately
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if(title == "RENDERING RANGER R2") emulator->configure("Hacks/DSP/Fast", false);
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//will hang sometimes in the "Bach in Time" stage
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if(title == "BUBSY II" && region == "PAL") emulator->configure("Hacks/DSP/Fast", false);
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//fixes an errant scanline on the title screen due to writing to PPU registers too late
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if(title == "ADVENTURES OF FRANKEN" && region == "PAL") emulator->configure("Hacks/PPU/RenderCycle", 32);
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//fixes an errant scanline on the title screen due to writing to PPU registers too late
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if(title == "FIREPOWER 2000" || title == "SUPER SWIV") emulator->configure("Hacks/PPU/RenderCycle", 32);
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//fixes an errant scanline on the title screen due to writing to PPU registers too late
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if(title == "NHL '94" || title == "NHL PROHOCKEY'94") emulator->configure("Hacks/PPU/RenderCycle", 32);
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//fixes an errant scanline on the title screen due to writing to PPU registers too late
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if(title == "Sugoro Quest++") emulator->configure("Hacks/PPU/RenderCycle", 128);
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if (emulator->configuration("Hacks/Hotfixes")) {
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//this game transfers uninitialized memory into video RAM: this can cause a row of invalid tiles
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//to appear in the background of stage 12. this one is a bug in the original game, so only enable
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//it if the hotfixes option has been enabled.
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if(title == "The Hurricanes") emulator->configure("Hacks/Entropy", "None");
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//Frisky Tom attract sequence sometimes hangs when WRAM is initialized to pseudo-random patterns
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if (title == "ニチブツ・アーケード・クラシックス") emulator->configure("Hacks/Entropy", "None");
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}
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emulator->power();
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}
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auto Program::load(uint id, string name, string type, vector<string> options) -> Emulator::Platform::Load {
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if (id == 1)
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{
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if (loadSuperFamicom(superFamicom.location))
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{
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return {id, superFamicom.region};
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}
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}
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else if (id == 2)
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{
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if (loadGameBoy(gameBoy.location))
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{
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return { id, NULL };
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}
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}
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else if (id == 3) {
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if (loadBSMemory(bsMemory.location)) {
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return { id, NULL };
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}
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}
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return { id, options(0) };
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}
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auto Program::videoFrame(const uint32* data, uint pitch, uint width, uint height, uint scale) -> void {
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uint offset = overscan ? 8 : 12;
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uint multiplier = height / 215;
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data += offset * (pitch >> 2) * multiplier;
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height -= offset * 2 * multiplier;
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video_cb(data, width, height, pitch);
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}
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// Double the fun!
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static int16_t d2i16(double v)
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{
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v *= 0x8000;
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if (v > 0x7fff)
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v = 0x7fff;
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else if (v < -0x8000)
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v = -0x8000;
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return int16_t(floor(v + 0.5));
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}
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auto Program::audioFrame(const double* samples, uint channels) -> void
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{
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int16_t left = d2i16(samples[0]);
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int16_t right = d2i16(samples[1]);
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//audio_cb(left, right);
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audio_queue(left, right);
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}
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auto pollInputDevices(uint port, uint device, uint input) -> int16
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{
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// TODO: This will need to be remapped on a per-system basis.
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unsigned libretro_port;
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unsigned libretro_id;
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unsigned libretro_device;
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unsigned libretro_index = 0;
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static const unsigned joypad_mapping[] = {
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RETRO_DEVICE_ID_JOYPAD_UP,
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RETRO_DEVICE_ID_JOYPAD_DOWN,
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RETRO_DEVICE_ID_JOYPAD_LEFT,
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RETRO_DEVICE_ID_JOYPAD_RIGHT,
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RETRO_DEVICE_ID_JOYPAD_B,
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RETRO_DEVICE_ID_JOYPAD_A,
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RETRO_DEVICE_ID_JOYPAD_Y,
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RETRO_DEVICE_ID_JOYPAD_X,
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RETRO_DEVICE_ID_JOYPAD_L,
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RETRO_DEVICE_ID_JOYPAD_R,
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RETRO_DEVICE_ID_JOYPAD_SELECT,
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RETRO_DEVICE_ID_JOYPAD_START,
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};
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static const unsigned mouse_mapping[] = {
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RETRO_DEVICE_ID_MOUSE_X,
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RETRO_DEVICE_ID_MOUSE_Y,
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RETRO_DEVICE_ID_MOUSE_LEFT,
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RETRO_DEVICE_ID_MOUSE_RIGHT,
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};
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switch (port)
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{
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case SuperFamicom::ID::Port::Controller1:
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libretro_port = 0;
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break;
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case SuperFamicom::ID::Port::Controller2:
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libretro_port = 1;
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break;
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default:
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return 0;
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}
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switch (device)
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{
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case SuperFamicom::ID::Device::Gamepad:
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libretro_device = RETRO_DEVICE_JOYPAD;
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libretro_id = joypad_mapping[input];
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break;
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case SuperFamicom::ID::Device::Mouse:
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libretro_device = RETRO_DEVICE_MOUSE;
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libretro_id = mouse_mapping[input];
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break;
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case SuperFamicom::ID::Device::SuperMultitap:
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libretro_device = RETRO_DEVICE_JOYPAD; // Maps to player [2, 5].
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libretro_port += input / 12;
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libretro_id = joypad_mapping[input % 12];
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break;
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// TODO: SuperScope/Justifiers.
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// Do we care? The v94 port hasn't hooked them up. :)
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default:
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return 0;
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}
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return input_state(libretro_port, libretro_device, libretro_index, libretro_id);
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}
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auto Program::inputPoll(uint port, uint device, uint input) -> int16
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{
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return pollInputDevices(port, device, input);
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}
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auto Program::inputRumble(uint port, uint device, uint input, bool enable) -> void
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{
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}
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auto Program::openRomSuperFamicom(string name, vfs::file::mode mode) -> shared_pointer<vfs::file>
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{
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if(name == "program.rom" && mode == vfs::file::mode::read)
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{
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return vfs::memory::file::open(superFamicom.program.data(), superFamicom.program.size());
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}
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if(name == "data.rom" && mode == vfs::file::mode::read)
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{
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return vfs::memory::file::open(superFamicom.data.data(), superFamicom.data.size());
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}
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if(name == "expansion.rom" && mode == vfs::file::mode::read)
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{
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return vfs::memory::file::open(superFamicom.expansion.data(), superFamicom.expansion.size());
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}
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if(name == "msu1/data.rom")
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{
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return vfs::fs::file::open({Location::notsuffix(superFamicom.location), ".msu"}, mode);
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}
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if(name.match("msu1/track*.pcm"))
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{
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name.trimLeft("msu1/track", 1L);
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return vfs::fs::file::open({Location::notsuffix(superFamicom.location), name}, mode);
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}
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if(name == "save.ram")
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{
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string save_path;
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auto suffix = Location::suffix(base_name);
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auto base = Location::base(base_name.transform("\\", "/"));
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const char *save = nullptr;
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if (environ_cb && environ_cb(RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY, &save) && save)
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save_path = { string(save).transform("\\", "/"), "/", base.trimRight(suffix, 1L), ".srm" };
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else
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save_path = { base_name.trimRight(suffix, 1L), ".srm" };
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return vfs::fs::file::open(save_path, mode);
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}
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return {};
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}
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auto Program::openRomGameBoy(string name, vfs::file::mode mode) -> shared_pointer<vfs::file> {
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if(name == "program.rom" && mode == vfs::file::mode::read)
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{
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return vfs::memory::file::open(gameBoy.program.data(), gameBoy.program.size());
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}
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if(name == "save.ram")
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{
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string save_path;
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auto suffix = Location::suffix(base_name);
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auto base = Location::base(base_name.transform("\\", "/"));
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const char *save = nullptr;
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if (environ_cb && environ_cb(RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY, &save) && save)
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save_path = { string(save).transform("\\", "/"), "/", base.trimRight(suffix, 1L), ".srm" };
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else
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save_path = { base_name.trimRight(suffix, 1L), ".srm" };
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return vfs::fs::file::open(save_path, mode);
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}
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if(name == "time.rtc")
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{
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string save_path;
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auto suffix = Location::suffix(base_name);
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auto base = Location::base(base_name.transform("\\", "/"));
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const char *save = nullptr;
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if (environ_cb && environ_cb(RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY, &save) && save)
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save_path = { string(save).transform("\\", "/"), "/", base.trimRight(suffix, 1L), ".rtc" };
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else
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save_path = { base_name.trimRight(suffix, 1L), ".rtc" };
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return vfs::fs::file::open(save_path, mode);
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}
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return {};
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}
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auto Program::openRomBSMemory(string name, vfs::file::mode mode) -> shared_pointer<vfs::file> {
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if (name == "program.rom" && mode == vfs::file::mode::read)
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{
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return vfs::memory::file::open(bsMemory.program.data(), bsMemory.program.size());
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}
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if (name == "program.flash")
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{
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//writes are not flushed to disk
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return vfs::memory::file::open(bsMemory.program.data(), bsMemory.program.size());
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}
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return {};
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}
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auto Program::loadFile(string location) -> vector<uint8_t>
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{
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if(Location::suffix(location).downcase() == ".zip") {
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Decode::ZIP archive;
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if(archive.open(location)) {
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for(auto& file : archive.file) {
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auto type = Location::suffix(file.name).downcase();
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if(type == ".sfc" || type == ".smc" || type == ".gb" || type == ".gbc" || type == ".bs" || type == ".st") {
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return archive.extract(file);
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}
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}
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|
}
|
|
return {};
|
|
}
|
|
else if(Location::suffix(location).downcase() == ".7z") {
|
|
return LZMA::extract(location);
|
|
}
|
|
else {
|
|
return file::read(location);
|
|
}
|
|
}
|
|
|
|
auto Program::loadSuperFamicom(string location) -> bool
|
|
{
|
|
vector<uint8_t> rom;
|
|
rom = loadFile(location);
|
|
|
|
if(rom.size() < 0x8000) return false;
|
|
|
|
//assume ROM and IPS agree on whether a copier header is present
|
|
//superFamicom.patched = applyPatchIPS(rom, location);
|
|
if((rom.size() & 0x7fff) == 512) {
|
|
//remove copier header
|
|
memory::move(&rom[0], &rom[512], rom.size() - 512);
|
|
rom.resize(rom.size() - 512);
|
|
}
|
|
|
|
auto heuristics = Heuristics::SuperFamicom(rom, location);
|
|
auto sha256 = Hash::SHA256(rom).digest();
|
|
|
|
superFamicom.title = heuristics.title();
|
|
superFamicom.region = heuristics.videoRegion();
|
|
superFamicom.manifest = heuristics.manifest();
|
|
|
|
hackPatchMemory(rom);
|
|
superFamicom.document = BML::unserialize(superFamicom.manifest);
|
|
superFamicom.location = location;
|
|
|
|
uint offset = 0;
|
|
if(auto size = heuristics.programRomSize()) {
|
|
superFamicom.program.resize(size);
|
|
memory::copy(&superFamicom.program[0], &rom[offset], size);
|
|
offset += size;
|
|
}
|
|
if(auto size = heuristics.dataRomSize()) {
|
|
superFamicom.data.resize(size);
|
|
memory::copy(&superFamicom.data[0], &rom[offset], size);
|
|
offset += size;
|
|
}
|
|
if(auto size = heuristics.expansionRomSize()) {
|
|
superFamicom.expansion.resize(size);
|
|
memory::copy(&superFamicom.expansion[0], &rom[offset], size);
|
|
offset += size;
|
|
}
|
|
if(auto size = heuristics.firmwareRomSize()) {
|
|
superFamicom.firmware.resize(size);
|
|
memory::copy(&superFamicom.firmware[0], &rom[offset], size);
|
|
offset += size;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
auto Program::loadGameBoy(string location) -> bool {
|
|
vector<uint8_t> rom;
|
|
rom = loadFile(location);
|
|
|
|
if (rom.size() < 0x4000) return false;
|
|
|
|
auto heuristics = Heuristics::GameBoy(rom, location);
|
|
auto sha256 = Hash::SHA256(rom).digest();
|
|
|
|
gameBoy.manifest = heuristics.manifest();
|
|
gameBoy.document = BML::unserialize(gameBoy.manifest);
|
|
gameBoy.location = location;
|
|
gameBoy.program = rom;
|
|
|
|
return true;
|
|
}
|
|
|
|
auto Program::loadBSMemory(string location) -> bool {
|
|
vector<uint8_t> rom;
|
|
rom = loadFile(location);
|
|
|
|
if (rom.size() < 0x8000) return false;
|
|
|
|
auto heuristics = Heuristics::BSMemory(rom, location);
|
|
auto sha256 = Hash::SHA256(rom).digest();
|
|
|
|
bsMemory.manifest = heuristics.manifest();
|
|
bsMemory.document = BML::unserialize(bsMemory.manifest);
|
|
bsMemory.location = location;
|
|
|
|
bsMemory.program = rom;
|
|
return true;
|
|
}
|
|
|
|
auto Program::hackPatchMemory(vector<uint8_t>& data) -> void
|
|
{
|
|
auto title = superFamicom.title;
|
|
|
|
if(title == "Satellaview BS-X" && data.size() >= 0x100000) {
|
|
//BS-X: Sore wa Namae o Nusumareta Machi no Monogatari (JPN) (1.1)
|
|
//disable limited play check for BS Memory flash cartridges
|
|
//benefit: allow locked out BS Memory flash games to play without manual header patching
|
|
//detriment: BS Memory ROM cartridges will cause the game to hang in the load menu
|
|
if(data[0x4a9b] == 0x10) data[0x4a9b] = 0x80;
|
|
if(data[0x4d6d] == 0x10) data[0x4d6d] = 0x80;
|
|
if(data[0x4ded] == 0x10) data[0x4ded] = 0x80;
|
|
if(data[0x4e9a] == 0x10) data[0x4e9a] = 0x80;
|
|
}
|
|
}
|
|
|
|
auto decodeSNES(string& code) -> bool {
|
|
//Game Genie
|
|
if(code.size() == 9 && code[4u] == '-') {
|
|
//strip '-'
|
|
code = {code.slice(0, 4), code.slice(5, 4)};
|
|
//validate
|
|
for(uint n : code) {
|
|
if(n >= '0' && n <= '9') continue;
|
|
if(n >= 'a' && n <= 'f') continue;
|
|
return false;
|
|
}
|
|
//decode
|
|
code.transform("df4709156bc8a23e", "0123456789abcdef");
|
|
uint32_t r = toHex(code);
|
|
//abcd efgh ijkl mnop qrst uvwx
|
|
//ijkl qrst opab cduv wxef ghmn
|
|
uint address =
|
|
(!!(r & 0x002000) << 23) | (!!(r & 0x001000) << 22)
|
|
| (!!(r & 0x000800) << 21) | (!!(r & 0x000400) << 20)
|
|
| (!!(r & 0x000020) << 19) | (!!(r & 0x000010) << 18)
|
|
| (!!(r & 0x000008) << 17) | (!!(r & 0x000004) << 16)
|
|
| (!!(r & 0x800000) << 15) | (!!(r & 0x400000) << 14)
|
|
| (!!(r & 0x200000) << 13) | (!!(r & 0x100000) << 12)
|
|
| (!!(r & 0x000002) << 11) | (!!(r & 0x000001) << 10)
|
|
| (!!(r & 0x008000) << 9) | (!!(r & 0x004000) << 8)
|
|
| (!!(r & 0x080000) << 7) | (!!(r & 0x040000) << 6)
|
|
| (!!(r & 0x020000) << 5) | (!!(r & 0x010000) << 4)
|
|
| (!!(r & 0x000200) << 3) | (!!(r & 0x000100) << 2)
|
|
| (!!(r & 0x000080) << 1) | (!!(r & 0x000040) << 0);
|
|
uint data = r >> 24;
|
|
code = {hex(address, 6L), "=", hex(data, 2L)};
|
|
return true;
|
|
}
|
|
|
|
//Pro Action Replay
|
|
if(code.size() == 8) {
|
|
//validate
|
|
for(uint n : code) {
|
|
if(n >= '0' && n <= '9') continue;
|
|
if(n >= 'a' && n <= 'f') continue;
|
|
return false;
|
|
}
|
|
//decode
|
|
uint32_t r = toHex(code);
|
|
uint address = r >> 8;
|
|
uint data = r & 0xff;
|
|
code = {hex(address, 6L), "=", hex(data, 2L)};
|
|
return true;
|
|
}
|
|
|
|
//higan: address=data
|
|
if(code.size() == 9 && code[6u] == '=') {
|
|
string nibbles = {code.slice(0, 6), code.slice(7, 2)};
|
|
//validate
|
|
for(uint n : nibbles) {
|
|
if(n >= '0' && n <= '9') continue;
|
|
if(n >= 'a' && n <= 'f') continue;
|
|
return false;
|
|
}
|
|
//already in decoded form
|
|
return true;
|
|
}
|
|
|
|
//higan: address=compare?data
|
|
if(code.size() == 12 && code[6u] == '=' && code[9u] == '?') {
|
|
string nibbles = {code.slice(0, 6), code.slice(7, 2), code.slice(10, 2)};
|
|
//validate
|
|
for(uint n : nibbles) {
|
|
if(n >= '0' && n <= '9') continue;
|
|
if(n >= 'a' && n <= 'f') continue;
|
|
return false;
|
|
}
|
|
//already in decoded form
|
|
return true;
|
|
}
|
|
|
|
//unrecognized code format
|
|
return false;
|
|
}
|
|
|
|
auto decodeGB(string& code) -> bool {
|
|
auto nibble = [&](const string& s, uint index) -> uint {
|
|
if(index >= s.size()) return 0;
|
|
if(s[index] >= '0' && s[index] <= '9') return s[index] - '0';
|
|
return s[index] - 'a' + 10;
|
|
};
|
|
|
|
//Game Genie
|
|
if(code.size() == 7 && code[3u] == '-') {
|
|
code = {code.slice(0, 3), code.slice(4, 3)};
|
|
//validate
|
|
for(uint n : code) {
|
|
if(n >= '0' && n <= '9') continue;
|
|
if(n >= 'a' && n <= 'f') continue;
|
|
return false;
|
|
}
|
|
uint data = nibble(code, 0) << 4 | nibble(code, 1) << 0;
|
|
uint address = (nibble(code, 5) ^ 15) << 12 | nibble(code, 2) << 8 | nibble(code, 3) << 4 | nibble(code, 4) << 0;
|
|
code = {hex(address, 4L), "=", hex(data, 2L)};
|
|
return true;
|
|
}
|
|
|
|
//Game Genie
|
|
if(code.size() == 11 && code[3u] == '-' && code[7u] == '-') {
|
|
code = {code.slice(0, 3), code.slice(4, 3), code.slice(8, 3)};
|
|
//validate
|
|
for(uint n : code) {
|
|
if(n >= '0' && n <= '9') continue;
|
|
if(n >= 'a' && n <= 'f') continue;
|
|
return false;
|
|
}
|
|
uint data = nibble(code, 0) << 4 | nibble(code, 1) << 0;
|
|
uint address = (nibble(code, 5) ^ 15) << 12 | nibble(code, 2) << 8 | nibble(code, 3) << 4 | nibble(code, 4) << 0;
|
|
uint8_t t = nibble(code, 6) << 4 | nibble(code, 8) << 0;
|
|
t = t >> 2 | t << 6;
|
|
uint compare = t ^ 0xba;
|
|
code = {hex(address, 4L), "=", hex(compare, 2L), "?", hex(data, 2L)};
|
|
return true;
|
|
}
|
|
|
|
//GameShark
|
|
if(code.size() == 8) {
|
|
//validate
|
|
for(uint n : code) {
|
|
if(n >= '0' && n <= '9') continue;
|
|
if(n >= 'a' && n <= 'f') continue;
|
|
return false;
|
|
}
|
|
//first two characters are the code type / VRAM bank, which is almost always 01.
|
|
//other values are presumably supported, but I have no info on them, so they're not supported.
|
|
if(code[0u] != '0') return false;
|
|
if(code[1u] != '1') return false;
|
|
uint data = toHex(code.slice(2, 2));
|
|
uint16_t address = toHex(code.slice(4, 4));
|
|
address = address >> 8 | address << 8;
|
|
code = {hex(address, 4L), "=", hex(data, 2L)};
|
|
return true;
|
|
}
|
|
|
|
//higan: address=data
|
|
if(code.size() == 7 && code[4u] == '=') {
|
|
string nibbles = {code.slice(0, 4), code.slice(5, 2)};
|
|
//validate
|
|
for(uint n : nibbles) {
|
|
if(n >= '0' && n <= '9') continue;
|
|
if(n >= 'a' && n <= 'f') continue;
|
|
return false;
|
|
}
|
|
//already in decoded form
|
|
return true;
|
|
}
|
|
|
|
//higan: address=compare?data
|
|
if(code.size() == 10 && code[4u] == '=' && code[7u] == '?') {
|
|
string nibbles = {code.slice(0, 4), code.slice(5, 2), code.slice(8, 2)};
|
|
//validate
|
|
for(uint n : nibbles) {
|
|
if(n >= '0' && n <= '9') continue;
|
|
if(n >= 'a' && n <= 'f') continue;
|
|
return false;
|
|
}
|
|
//already in decoded form
|
|
return true;
|
|
}
|
|
|
|
//unrecognized code format
|
|
return false;
|
|
} |