52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
#ifndef YAZE_SNES_H_
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#define YAZE_SNES_H_
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#include <cstdint>
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namespace yaze {
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inline uint32_t SnesToPc(uint32_t addr) noexcept {
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constexpr uint32_t kFastRomRegion = 0x808000;
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if (addr >= kFastRomRegion) {
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addr -= kFastRomRegion;
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}
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uint32_t temp = (addr & 0x7FFF) + ((addr / 2) & 0xFF8000);
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return (temp + 0x0);
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}
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inline uint32_t PcToSnes(uint32_t addr) {
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uint8_t* b = reinterpret_cast<uint8_t*>(&addr);
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b[2] = static_cast<uint8_t>(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 addr;
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}
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inline uint32_t Get24LocalFromPC(uint8_t* data, int addr, bool pc = true) {
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uint32_t ret =
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(PcToSnes(addr) & 0xFF0000) | (data[addr + 1] << 8) | data[addr];
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if (pc) {
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return SnesToPc(ret);
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}
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return ret;
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}
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inline int AddressFromBytes(uint8_t bank, uint8_t high, uint8_t low) noexcept {
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return (bank << 16) | (high << 8) | low;
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}
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inline uint32_t MapBankToWordAddress(uint8_t bank, uint16_t addr) noexcept {
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uint32_t result = 0;
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result = (bank << 16) | addr;
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return result;
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}
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} // namespace yaze
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#endif // YAZE_SNES_H_
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