From 84cbd185bbec911193d5d6ee920805b9f95205f1 Mon Sep 17 00:00:00 2001
From: Paul Mathieu <paulmathieu@google.com>
Date: Sat, 24 Apr 2021 08:55:51 -0700
Subject: [PATCH] sysbus: fix concurrent read & writes

---
 sysbus/sysbus.vhdl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sysbus/sysbus.vhdl b/sysbus/sysbus.vhdl
index 36518a1..2cdd6c9 100644
--- a/sysbus/sysbus.vhdl
+++ b/sysbus/sysbus.vhdl
@@ -130,6 +130,8 @@ begin
             bus_we <= '0';
             bus_re <= '1';
 
+            m1_busy <= '1';
+
           when "0001" =>
             state_next <= READING;
             owner_next <= "01";
@@ -138,6 +140,8 @@ begin
             bus_we <= '0';
             bus_re <= '1';
 
+            m0_busy <= '1';
+
           when "0011" =>
             state_next <= READING;
             owner_next <= "10";