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New information about PPU changes between CGB-B and CGB-E

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This commit is contained in:
Lior Halphon 2018-04-06 03:19:47 +03:00
parent cc95c89d3c
commit a6ed2029b7
1 changed files with 3 additions and 0 deletions
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Core/display.c
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@ -654,6 +654,9 @@ void GB_display_run(GB_gameboy_t *gb, uint8_t cycles)
uint8_t y = fetcher_y(gb); uint8_t y = fetcher_y(gb);
if (gb->is_cgb) { if (gb->is_cgb) {
/* This value is cached on the CGB, so it cannot be used to mix tiles together */ /* This value is cached on the CGB, so it cannot be used to mix tiles together */
/* Todo: This is NOT true on CGB-B! This is likely the case for all CGBs prior to D.
Currently, SameBoy is emulating CGB-E, but if other revisions are added in the future
this should be taken care of*/
gb->fetcher_y = y; gb->fetcher_y = y;
} }
gb->current_tile = gb->vram[map + gb->fetcher_x + y / 8 * 32]; gb->current_tile = gb->vram[map + gb->fetcher_x + y / 8 * 32];