From 4860cd945f7aab34e20b3751aa6e090b06cf0ba4 Mon Sep 17 00:00:00 2001
From: b1ackmai1er <difficultylevelhigh@gmail.com>
Date: Thu, 23 May 2019 23:21:48 +0800
Subject: [PATCH] Update hbios.asm

---
 Source/HBIOS/hbios.asm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 2c2f0e39..d59ccfb4 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -1255,6 +1255,7 @@ PSCNX	.EQU	$ + 1
 	PRTS("MHz$")
 #IF ((PLATFORM == PLT_N8) | (PLATFORM == PLT_MK4) | (PLATFORM == PLT_RCZ180))
 	LD	L,1			; flag Z180
+	LD	D,0
 	OUT0	(Z180_ASTC1L),D		; D = 0 at this point
 	IN0	A,(Z180_FRC)		; supposedly only on S-class
 	INC	A			; FF or 00 -> 0 or 1 (weak S-class or higher)