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new-fix a recently created ppu bug affecting some vertical scrolling

This commit is contained in:
zeromus 2012-03-10 05:30:53 +00:00
parent c3ba1905ca
commit 5493904312
1 changed files with 6 additions and 4 deletions
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10
BizHawk.Emulation/Consoles/Nintendo/NES/PPU.regs.cs
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@ -230,12 +230,13 @@ namespace BizHawk.Emulation.Consoles.Nintendo
public void increment2007(bool rendering, bool by32) public void increment2007(bool rendering, bool by32)
{ {
//new knowledge as of 2010 - use this incrementing method while rendering is active (thanks, nemulator)
//http://nesdev.parodius.com/bbs/viewtopic.php?t=6401
if (rendering) if (rendering)
{ {
if (by32) increment_vs(); //don't do this:
else increment_hsc(); //if (by32) increment_vs();
//else increment_hsc();
//do this instead:
increment_vs(); //yes, even if we're moving by 32
return; return;
} }
@ -493,6 +494,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
nes.board.AddressPPU(addr); nes.board.AddressPPU(addr);
nes.LogLine("read 2007");
ppur.increment2007(ppur.status.rendering && reg_2001.PPUON, reg_2000.vram_incr32 != 0); ppur.increment2007(ppur.status.rendering && reg_2001.PPUON, reg_2000.vram_incr32 != 0);
return ret; return ret;