From a5f605d00d22095532cc32aa7a481465b1bdca17 Mon Sep 17 00:00:00 2001
From: David Banks <dave@hoglet.com>
Date: Sat, 12 Jun 2021 16:12:21 +0100
Subject: [PATCH] 65C02: fix a bug with TSB/TRB when RDY used

Change-Id: I4abeb6b92935b2f82d7803f9f29f409a47e296b9
---
 cpu_65c02.v | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cpu_65c02.v b/cpu_65c02.v
index f23e5eb..967b7a3 100644
--- a/cpu_65c02.v
+++ b/cpu_65c02.v
@@ -834,7 +834,8 @@ always @(posedge clk )
  * Special Z flag got TRB/TSB
  */
 always @(posedge clk)
-    AZ2 <= ~|(AI & regfile);
+    if (RDY)
+        AZ2 <= ~|(AI & regfile);
 
 /*
  * Update Z, N flags when writing A, X, Y, Memory, or when doing compare