From e543702e242d72ed0016e3edad68de0ea417914e Mon Sep 17 00:00:00 2001
From: Brandon Wright <bearoso@gmail.com>
Date: Fri, 5 Oct 2018 18:17:19 -0500
Subject: [PATCH] Allow instant IRQ trigger from 4200 writes again.

---
 ppu.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ppu.cpp b/ppu.cpp
index 612f25c7..6b50a667 100644
--- a/ppu.cpp
+++ b/ppu.cpp
@@ -1567,7 +1567,7 @@ void S9xSetCPU (uint8 Byte, uint16 Address)
 				}
 
 				if ((Byte & 0x30) != (Memory.FillRAM[0x4200] & 0x30))
-					S9xUpdateIRQPositions(false);
+					S9xUpdateIRQPositions(true);
 
 				// NMI can trigger immediately during VBlank as long as NMI_read ($4210) wasn't cleard.
 				if ((Byte & 0x80) && !(Memory.FillRAM[0x4200] & 0x80) &&