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More accurate fetcher penalty emulation, fixed intr_2_mode0_timing_sprites_nops, affects #54

This commit is contained in:
Lior Halphon 2018-03-30 02:53:49 +03:00
parent 311a470806
commit 2c44ffbe39
2 changed files with 7 additions and 8 deletions
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13
Core/display.c
View File

@ -555,14 +555,11 @@ void GB_display_run(GB_gameboy_t *gb, uint8_t cycles)
(gb->io_registers[GB_IO_LCDC] & 2 || gb->is_cgb) &&
gb->obj_comperators[gb->n_visible_objs - 1] == (uint8_t)(gb->position_in_line + 8)) {
if (!gb->fetching_objects) {
if (gb->fetcher_stop_penalty == 0) {
/* Penalty for interrupting the fetcher */
uint8_t penalty = (uint8_t[]){5, 4, 3, 2, 1, 0, 0, 0}[gb->fetcher_state * 2 + gb->fetcher_divisor];
gb->cycles_for_line += penalty;
GB_SLEEP(gb, display, 19, penalty);
gb->fetcher_stop_penalty = (uint8_t[]){5, 4, 3, 2, 1, 0, 0, 0}[gb->fetcher_state * 2 + gb->fetcher_divisor];
}
gb->fetching_objects = true;
gb->cycles_for_line += 6;
GB_SLEEP(gb, display, 20, 6);
GB_object_t *object = &objects[gb->visible_objs[gb->n_visible_objs - 1]];
@ -593,8 +590,6 @@ void GB_display_run(GB_gameboy_t *gb, uint8_t cycles)
gb->n_visible_objs--;
}
gb->fetching_objects = false;
/* Handle window */
/* Todo: Timing not verified by test ROM */
@ -671,6 +666,10 @@ void GB_display_run(GB_gameboy_t *gb, uint8_t cycles)
render_pixel_if_possible(gb);
if (push) {
gb->cycles_for_line += gb->fetcher_stop_penalty;
GB_SLEEP(gb, display, 19, gb->fetcher_stop_penalty);
gb->fetcher_stop_penalty = 0;
fifo_push_bg_row(&gb->bg_fifo, gb->current_tile_data[0], gb->current_tile_data[1],
gb->current_tile_attributes & 7, gb->current_tile_attributes & 0x80, gb->current_tile_attributes & 0x20);
gb->bg_fifo_paused = false;

2
Core/gb.h
View File

@ -425,7 +425,7 @@ struct GB_gameboy_internal_s {
uint8_t visible_objs[10];
uint8_t obj_comperators[10];
uint8_t n_visible_objs;
bool fetching_objects;
uint8_t fetcher_stop_penalty;
uint8_t oam_search_index;
uint8_t accessed_oam_row;
);