From 0d2daa24d5d5edd918ee484b97fd2925729c4605 Mon Sep 17 00:00:00 2001
From: alyosha-tas <alexei.f.k@gmail.com>
Date: Fri, 17 Apr 2020 22:09:23 -0400
Subject: [PATCH] O2Hawk: fix DJNZ, fixes kill the attacking aliens

---
 BizHawk.Emulation.Cores/CPUs/Intel8048/OP_Tables.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/BizHawk.Emulation.Cores/CPUs/Intel8048/OP_Tables.cs b/BizHawk.Emulation.Cores/CPUs/Intel8048/OP_Tables.cs
index 9d82b1fd22..38becc6b0b 100644
--- a/BizHawk.Emulation.Cores/CPUs/Intel8048/OP_Tables.cs
+++ b/BizHawk.Emulation.Cores/CPUs/Intel8048/OP_Tables.cs
@@ -398,11 +398,13 @@ namespace BizHawk.Emulation.Cores.Components.I8048
 			}
 			else
 			{
+				// NOTE: no PC increment here, jump is relative to last 256 address block before increment.
+				// so for a DJNZ starting at 0xFE does not overflow to 0x100 before the jump
 				PopulateCURINSTR(IDLE,
 								IDLE,
 								DEC8, (ushort)(reg + RB),
 								RD, ALU, PC,
-								INC11, PC,
+								IDLE,
 								IDLE,
 								IDLE,
 								IDLE,