diff -Nru xmame-0.99.orig/src/drivers/mcr3.c xmame-0.99/src/drivers/mcr3.c
--- xmame-0.99.orig/src/drivers/mcr3.c	2005-08-06 09:57:24.000000000 -0700
+++ xmame-0.99/src/drivers/mcr3.c	2005-08-18 08:40:57.000000000 -0700
@@ -1083,6 +1083,7 @@
 
 	/* video hardware */
 	MDRV_VIDEO_START(mcrmono)
+        MDRV_VIDEO_UPDATE(mcr3)
 MACHINE_DRIVER_END