From 01d1bb47b693d3e3921cb6c770adc84677dec800 Mon Sep 17 00:00:00 2001
From: SaxxonPike <saxxonpike@gmail.com>
Date: Tue, 23 Jul 2019 06:54:28 -0500
Subject: [PATCH] C64: Sprite DMA clears out existing bits

---
 BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Vic.Parse.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Vic.Parse.cs b/BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Vic.Parse.cs
index d514c320a8..20a5c23db7 100644
--- a/BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Vic.Parse.cs
+++ b/BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Vic.Parse.cs
@@ -226,6 +226,7 @@
 						if (spr.Dma)
 						{
 							_parseAddr = spr.Mc | (spr.Pointer << 6);
+							spr.Sr &= ~(0xFF << ((0x30 - (_parseFetch & 0x30)) >> 1));
 							spr.Sr |= ReadMemory(_parseAddr) << ((0x30 - (_parseFetch & 0x30)) >> 1);
 							spr.Mc = (spr.Mc + 1) & 0x3F;
 							spr.Loaded |= 0x800000;