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Fixed oam memory getting overridden during prerender scanline when rendering was disabled. oam_stress & cpu_dummy_writes_ppumem tests now pass.

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This commit is contained in:
Souryo 2016-01-11 18:55:58 -05:00
parent 1424f255e4
commit 181e461db1
1 changed files with 2 additions and 1 deletions
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3
Core/PPU.cpp
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@ -612,7 +612,8 @@ void PPU::ProcessPrerenderScanline()
{
ProcessPreVBlankScanline();
if(_cycle == 0 && _state.SpriteRamAddr >= 0x08) {
if(IsRenderingEnabled() && _cycle == 0 && _state.SpriteRamAddr >= 0x08) {
//This should only be done if rendering is enabled (otherwise oam_stress test fails immediately)
//"If OAMADDR is not less than eight when rendering starts, the eight bytes starting at OAMADDR & 0xF8 are copied to the first eight bytes of OAM"
memcpy(_spriteRAM, _spriteRAM + (_state.SpriteRamAddr & 0xF8), 8);
}