From 32070d327c9b140923bc8cac8fb2dd21de9dced7 Mon Sep 17 00:00:00 2001
From: arbee <rb6502@users.noreply.github.com>
Date: Wed, 30 Aug 2017 19:51:21 -0400
Subject: [PATCH] a2arcadebd: add port mirrors so all programs on the test disk
 work. [Golden Child]

---
 src/devices/bus/a2bus/a2arcadebd.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/devices/bus/a2bus/a2arcadebd.cpp b/src/devices/bus/a2bus/a2arcadebd.cpp
index 959b7b7f9a4..85dbe13e770 100644
--- a/src/devices/bus/a2bus/a2arcadebd.cpp
+++ b/src/devices/bus/a2bus/a2arcadebd.cpp
@@ -110,10 +110,12 @@ void a2bus_arcboard_device::write_c0nx(address_space &space, uint8_t offset, uin
 {
 	switch (offset)
 	{
+		case 0:
 		case 2:
 			m_tms->vram_write(space, 0, data);
 			break;
 
+		case 1:
 		case 3:
 			m_tms->register_write(space, 0, data);
 			break;