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C64: Sprite DMA clears out existing bits

This commit is contained in:
SaxxonPike 2019-07-23 06:54:28 -05:00
parent b662646f2c
commit 01d1bb47b6
1 changed files with 1 additions and 0 deletions
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1
BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Vic.Parse.cs
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@ -226,6 +226,7 @@
if (spr.Dma) if (spr.Dma)
{ {
_parseAddr = spr.Mc | (spr.Pointer << 6); _parseAddr = spr.Mc | (spr.Pointer << 6);
spr.Sr &= ~(0xFF << ((0x30 - (_parseFetch & 0x30)) >> 1));
spr.Sr |= ReadMemory(_parseAddr) << ((0x30 - (_parseFetch & 0x30)) >> 1); spr.Sr |= ReadMemory(_parseAddr) << ((0x30 - (_parseFetch & 0x30)) >> 1);
spr.Mc = (spr.Mc + 1) & 0x3F; spr.Mc = (spr.Mc + 1) & 0x3F;
spr.Loaded |= 0x800000; spr.Loaded |= 0x800000;