From 3a8ddce4da62887e49ef76eef63abdc5b4a29390 Mon Sep 17 00:00:00 2001
From: angelosa <salese_corp_ltd@email.it>
Date: Wed, 16 Dec 2015 22:00:59 +0100
Subject: [PATCH] Silence sound CPU into pitfalling for Konami GX BIOS, nw

---
 src/mame/drivers/konamigx.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/mame/drivers/konamigx.cpp b/src/mame/drivers/konamigx.cpp
index 8da1cd300f8..24a28b04739 100644
--- a/src/mame/drivers/konamigx.cpp
+++ b/src/mame/drivers/konamigx.cpp
@@ -1919,6 +1919,14 @@ ROM_START(konamigx)
 
 	/* sound program */
 	ROM_REGION( 0x40000, "soundcpu", ROMREGION_ERASE00 )
+	// TODO: Bus Error, I guess?
+	//ROM_FILL( 4, 1, 0x00 )
+	//ROM_FILL( 5, 1, 0x00 )
+	ROM_FILL( 6, 1, 0x01 )
+	//ROM_FILL( 7, 1, 0x00 )
+	ROM_FILL( 0x100, 1, 0x60 )
+	ROM_FILL( 0x101, 1, 0xfe )
+
 	/* tiles */
 	ROM_REGION( 0x600000, "gfx1", ROMREGION_ERASEFF )
 	/* sprites */