mirror of https://github.com/bsnes-emu/bsnes.git
Correctly emulating the unused OAM memory in DMG mode
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@ -114,11 +114,15 @@ static uint8_t read_high_memory(GB_gameboy_t *gb, uint16_t addr)
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}
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if (addr < 0xFF00) {
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/* Unusable, simulate Gameboy Color */
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/* Unusable. CGB results are verified, but DMG results were tested on a SGB2 */
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if ((gb->io_registers[GB_IO_STAT] & 0x3) >= 2) { /* Seems to be disabled in Modes 2 and 3 */
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return 0xFF;
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}
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return (addr & 0xF0) | ((addr >> 4) & 0xF);
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if (gb->is_cgb) {
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return (addr & 0xF0) | ((addr >> 4) & 0xF);
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}
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return 0;
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}
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if (addr < 0xFF80) {
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