From 7cbc98fb7f129161b91582b8b201ca605121dce4 Mon Sep 17 00:00:00 2001
From: Wilbert Pol <wilbert@jdg.info>
Date: Fri, 8 Feb 2013 22:30:00 +0000
Subject: [PATCH] (MESS) gba.c: Another small tagmap cleanup (nw)

---
 src/mess/drivers/gba.c  | 2 +-
 src/mess/includes/gba.h | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mess/drivers/gba.c b/src/mess/drivers/gba.c
index e4d96f5526b..36581fc0297 100644
--- a/src/mess/drivers/gba.c
+++ b/src/mess/drivers/gba.c
@@ -1907,7 +1907,7 @@ WRITE32_MEMBER(gba_state::gba_oam_w)
 
 READ32_MEMBER(gba_state::gba_bios_r)
 {
-	UINT32 *rom = (UINT32 *)(*machine().root_device().memregion("maincpu"));
+	UINT32 *rom = (UINT32 *)(*m_region_maincpu);
 	if (m_bios_protected != 0)
 	{
 		offset = (m_bios_last_address + 8) / 4;
diff --git a/src/mess/includes/gba.h b/src/mess/includes/gba.h
index 31d0e7ce45b..ab40f628ce8 100644
--- a/src/mess/includes/gba.h
+++ b/src/mess/includes/gba.h
@@ -148,6 +148,7 @@ public:
 		m_lbdac(*this, "direct_b_left"),
 		m_rbdac(*this, "direct_b_right"),
 		m_gbsound(*this, "custom"),
+		m_region_maincpu(*this, "maincpu"),
 		m_io_in0(*this, "IN0")
 	{ }
 
@@ -283,6 +284,7 @@ public:
 	DECLARE_DEVICE_IMAGE_LOAD_MEMBER(gba_cart);
 
 protected:
+	required_memory_region m_region_maincpu;
 	required_ioport m_io_in0;
 };