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Fix HDMA5 not being correctly updated in memory when disabling hblank HDMA

This commit is contained in:
Lior Halphon 2023-12-09 15:54:57 +02:00
parent b51aac4bf5
commit 1c0f65177f
1 changed files with 1 additions and 3 deletions
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4
Core/memory.c
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@ -1678,6 +1678,7 @@ static void write_high_memory(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
return;
case GB_IO_HDMA5:
if (!gb->cgb_mode) return;
gb->hdma_steps_left = (value & 0x7F) + 1;
if ((value & 0x80) == 0 && gb->hdma_on_hblank) {
gb->hdma_on_hblank = false;
return;
@ -1687,8 +1688,6 @@ static void write_high_memory(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
if (gb->hdma_on_hblank && (gb->io_registers[GB_IO_STAT] & 3) == 0 && gb->display_state != 7) {
gb->hdma_on = true;
}
gb->io_registers[GB_IO_HDMA5] = value;
gb->hdma_steps_left = (gb->io_registers[GB_IO_HDMA5] & 0x7F) + 1;
return;
/* TODO: What happens when starting a transfer during external clock?
@ -1918,7 +1917,6 @@ void GB_hdma_run(GB_gameboy_t *gb)
if (--gb->hdma_steps_left == 0 || gb->hdma_current_dest == 0) {
gb->hdma_on = false;
gb->hdma_on_hblank = false;
gb->io_registers[GB_IO_HDMA5] &= 0x7F;
}
else if (gb->hdma_on_hblank) {
gb->hdma_on = false;