103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
#include "ROM.h"
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namespace yaze {
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namespace Application {
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namespace Utils {
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using namespace Graphics;
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void ROM::LoadFromFile(const std::string& path) {
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FILE * file = fopen(path.c_str(), "r+");
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if (file == NULL) return;
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fseek(file, 0, SEEK_END);
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long int size = ftell(file);
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fclose(file);
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std::cout << "size: " << size << std::endl;
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// Reading data to array of unsigned chars
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file = fopen(path.c_str(), "r+");
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current_rom_ = (unsigned char *) malloc(size);
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int bytes_read = fread(current_rom_, sizeof(unsigned char), size, file);
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fclose(file);
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}
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int ROM::SnesToPc(int addr) {
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if (addr >= 0x808000) {
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addr -= 0x808000;
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}
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int temp = (addr & 0x7FFF) + ((addr / 2) & 0xFF8000);
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return (temp + 0x0);
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}
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// TODO: FIXME
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int ROM::PcToSnes(int addr) {
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byte b[4];
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// = BitConverter.GetBytes(addr)
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b[2] = (byte)(b[2] * 2);
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if (b[1] >= 0x80) {
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b[2] += 1;
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} else {
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b[1] += 0x80;
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}
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//return BitConverter.ToInt32(b, 0);
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// snes always have + 0x8000 no matter what, the bank on pc is always / 2
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return ((addr * 2) & 0xFF0000) + (addr & 0x7FFF) + 0x8000;
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}
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int ROM::AddressFromBytes(byte addr1, byte addr2, byte addr3) {
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return (addr1 << 16) | (addr2 << 8) | addr3;
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}
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short ROM::AddressFromBytes(byte addr1, byte addr2) {
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return (short)((addr1 << 8) | (addr2));
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}
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void ROM::Write(int addr, byte value) { current_rom_[addr] = value; }
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void ROM::WriteLong(int addr, int value) {
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current_rom_[addr] = (byte)(value & 0xFF);
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current_rom_[addr + 1] = (byte)((value >> 8) & 0xFF);
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current_rom_[addr + 2] = (byte)((value >> 16) & 0xFF);
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}
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void ROM::WriteShort(int addr, int value) {
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current_rom_[addr] = (byte)(value & 0xFF);
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current_rom_[addr + 1] = (byte)((value >> 8) & 0xFF);
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}
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int ROM::ReadLong(int addr) {
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return ((current_rom_[addr + 2] << 16) + (current_rom_[addr + 1] << 8) +
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current_rom_[addr]);
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}
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Tile16 ROM::ReadTile16(int addr) {
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ushort t1 = (ushort)((current_rom_[addr + 1] << 8) + current_rom_[addr]);
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ushort t2 = (ushort)((current_rom_[addr + 3] << 8) + current_rom_[addr + 2]);
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ushort t3 = (ushort)((current_rom_[addr + 5] << 8) + current_rom_[addr + 4]);
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ushort t4 = (ushort)((current_rom_[addr + 7] << 8) + current_rom_[addr + 6]);
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return Tile16((unsigned long)((t1 << 48) + (t2 << 32) + (t3 << 16) + t4));
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}
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ushort ROM::ReadShort(int addr) {
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return (ushort)((current_rom_[addr + 1] << 8) + current_rom_[addr]);
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}
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short ROM::ReadRealShort(int addr) {
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return (short)((current_rom_[addr + 1] << 8) + current_rom_[addr]);
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}
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ushort ROM::ReadByte(int addr) { return (ushort)(current_rom_[addr]); }
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short ROM::ReadReverseShort(int addr) {
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return (short)((current_rom_[addr] << 8) + current_rom_[addr + 1]);
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}
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} // namespace Utils
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} // namespace Application
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} // namespace yaze
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