diff --git a/src/mame/drivers/model1.c b/src/mame/drivers/model1.c
index 80dfc230c8a..f0ace97f673 100644
--- a/src/mame/drivers/model1.c
+++ b/src/mame/drivers/model1.c
@@ -1227,7 +1227,7 @@ static INPUT_PORTS_START( swa )
 INPUT_PORTS_END
 
 #define MODEL1_CPU_BOARD \
-	ROM_REGION( 0xc0000, REGION_USER5, 0 ) \
+	ROM_REGION( 0xe0000, REGION_USER5, 0 ) \
 	ROM_LOAD32_WORD("opr14742.bin",  0x000000,  0x20000, CRC(446a1085) SHA1(51b3f4d3a35a36087ea0ba4e26d6e7d17b6418e2) ) \
 	ROM_LOAD32_WORD("opr14743.bin",  0x000002,  0x20000, CRC(e8953554) SHA1(1499f8e30ac15affc66e6f04ae031bb8680d9260) ) \
 	ROM_LOAD("opr14744.bin",   0x040000,  0x20000, CRC(730ea9e0) SHA1(651f1db4089a400d073b19ada299b4b08b08f372) ) \
diff --git a/src/mame/machine/model1.c b/src/mame/machine/model1.c
index f0e47855e67..1f23d8a6825 100644
--- a/src/mame/machine/model1.c
+++ b/src/mame/machine/model1.c
@@ -2157,7 +2157,8 @@ WRITE16_HANDLER( model1_vr_tgp_w )
 const struct mb86233_config model1_vr_tgp_config =
 {
 	copro_fifoin_pop,
-	copro_fifoout_push
+	copro_fifoout_push,
+	REGION_USER5
 };
 
 /* TGP memory map */