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Halt and Stop trigger the OAM bug

This commit is contained in:
Lior Halphon 2023-07-04 23:25:53 +03:00
parent 49ec02b3b3
commit 803abd9925
1 changed files with 2 additions and 1 deletions
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3
Core/sm83_cpu.c
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@ -424,6 +424,7 @@ static void leave_stop_mode(GB_gameboy_t *gb)
static void stop(GB_gameboy_t *gb, uint8_t opcode)
{
flush_pending_cycles(gb);
GB_read_memory(gb, gb->pc); // Timing is completely unverified, and only affects STOP triggering the OAM bug
if ((gb->io_registers[GB_IO_JOYP] & 0x30) != 0x30) {
gb->joyp_accessed = true;
}
@ -1071,9 +1072,9 @@ static void cp_a_r(GB_gameboy_t *gb, uint8_t opcode)
static void halt(GB_gameboy_t *gb, uint8_t opcode)
{
cycle_read(gb, gb->pc);
assert(gb->pending_cycles == 4);
gb->pending_cycles = 0;
GB_advance_cycles(gb, 4);
/* Despite what some online documentations say, the HALT bug also happens on a CGB, in both CGB and DMG modes. */
if (((gb->interrupt_enable & gb->io_registers[GB_IO_IF] & 0x1F) != 0)) {