From 30d45ae7d9dbd4aeebcfd2373b768f5aa189ee01 Mon Sep 17 00:00:00 2001
From: "Howard M. Harte" <hharte@magicandroidapps.com>
Date: Sat, 1 Apr 2023 07:01:16 -0700
Subject: [PATCH] AltairZ80: CPU: Properly reset PC.

After adding the sim_clock_precalibrate_commands, the PC was not zero
at the sim> prompt after loading altairz80.

Set CPU_S to zero in cpu_reset to address this issue.
---
 AltairZ80/altairz80_cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/AltairZ80/altairz80_cpu.c b/AltairZ80/altairz80_cpu.c
index 6a72b6de..5e52299b 100644
--- a/AltairZ80/altairz80_cpu.c
+++ b/AltairZ80/altairz80_cpu.c
@@ -6412,7 +6412,7 @@ static t_stat cpu_reset(DEVICE *dptr) {
     AF_S = AF1_S = 0;
     BC_S = DE_S = HL_S = 0;
     BC1_S = DE1_S = HL1_S = 0;
-    IR_S = IX_S = IY_S = SP_S = 0;
+    IR_S = IX_S = IY_S = SP_S = PC_S = 0;
     IM_S = IFF_S = 0;  /* Set IM0, reset IFF1 and IFF2 */
     setBankSelect(0);
     cpu8086reset();