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Slightly improve OAM read blocking timing

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Lior Halphon
2024-07-07 16:09:53 +03:00
parent 482b9a1562
commit a4525c3336
1 changed files with 3 additions and 3 deletions
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6
Core/display.c
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@@ -1603,7 +1603,7 @@ void GB_display_run(GB_gameboy_t *gb, unsigned cycles, bool force)
GB_SLEEP(gb, display, 6, 1);
gb->io_registers[GB_IO_LY] = gb->current_line;
gb->oam_read_blocked = true;
gb->oam_read_blocked = !gb->cgb_double_speed || gb->model >= GB_MODEL_CGB_D;
gb->ly_for_comparison = gb->current_line? -1 : 0;
/* The OAM STAT interrupt occurs 1 T-cycle before STAT actually changes, except on line 0.
@@ -1618,7 +1618,7 @@ void GB_display_run(GB_gameboy_t *gb, unsigned cycles, bool force)
GB_STAT_update(gb);
GB_SLEEP(gb, display, 7, 1);
gb->oam_read_blocked = true;
gb->io_registers[GB_IO_STAT] &= ~3;
gb->io_registers[GB_IO_STAT] |= 2;
gb->mode_for_interrupt = 2;
@@ -1910,7 +1910,7 @@ skip_slow_mode_3:
if (!gb->cgb_double_speed) {
gb->io_registers[GB_IO_STAT] &= ~3;
gb->mode_for_interrupt = 0;
gb->oam_read_blocked = false;
gb->oam_read_blocked = gb->model >= GB_MODEL_CGB_D;
gb->vram_read_blocked = false;
gb->oam_write_blocked = false;
gb->vram_write_blocked = false;