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Starting to fix CGB timing quirks

This commit is contained in:
Lior Halphon 2018-03-09 21:11:35 +02:00
parent 9083e883fe
commit cb6bb0590e
1 changed files with 12 additions and 6 deletions
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18
Core/display.c
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@ -596,9 +596,9 @@ void GB_display_run(GB_gameboy_t *gb, uint8_t cycles)
gb->vram_read_blocked = false;
gb->oam_write_blocked = false;
gb->vram_write_blocked = false;
gb->cycles_for_line = MODE2_LENGTH - 4;
gb->cycles_for_line = MODE2_LENGTH - 2;
GB_STAT_update(gb);
GB_SLEEP(gb, display, 2, MODE2_LENGTH - 4);
GB_SLEEP(gb, display, 2, MODE2_LENGTH - 2);
gb->io_registers[GB_IO_STAT] &= ~3;
gb->io_registers[GB_IO_STAT] |= 3;
@ -607,8 +607,8 @@ void GB_display_run(GB_gameboy_t *gb, uint8_t cycles)
gb->oam_write_blocked = true;
gb->vram_write_blocked = true;
GB_STAT_update(gb);
gb->cycles_for_line += MODE3_LENGTH + (gb->io_registers[GB_IO_SCX] & 7) + 2;
GB_SLEEP(gb, display, 3, MODE3_LENGTH + (gb->io_registers[GB_IO_SCX] & 7) + 2);
gb->cycles_for_line += MODE3_LENGTH + (gb->io_registers[GB_IO_SCX] & 7);
GB_SLEEP(gb, display, 3, MODE3_LENGTH + (gb->io_registers[GB_IO_SCX] & 7));
gb->io_registers[GB_IO_STAT] &= ~3;
gb->oam_read_blocked = false;
@ -668,8 +668,14 @@ void GB_display_run(GB_gameboy_t *gb, uint8_t cycles)
gb->position_in_line = - (gb->io_registers[GB_IO_SCX] & 7) - 8;
gb->fetcher_x = ((gb->io_registers[GB_IO_SCX]) / 8) & 0x1f;
gb->cycles_for_line += 5;
GB_SLEEP(gb, display, 10, 5);
{
uint8_t rendering_delay = 5;
if (gb->is_cgb) {
rendering_delay = gb->current_line == 0? 2 : 6;
}
gb->cycles_for_line += rendering_delay;
GB_SLEEP(gb, display, 10, rendering_delay);
}
/* The actual rendering cycle */
gb->fetcher_divisor = false;