diff --git a/src/mame/drivers/aerofgt.c b/src/mame/drivers/aerofgt.c
index a016c36e76a..fdd04b0575f 100644
--- a/src/mame/drivers/aerofgt.c
+++ b/src/mame/drivers/aerofgt.c
@@ -1193,7 +1193,7 @@ static const gfx_layout spikes91_spritelayout =
 	16,16,
 	RGN_FRAC(1,4),
 	4,
-	{ RGN_FRAC(0,4), RGN_FRAC(1,4), RGN_FRAC(2,4), RGN_FRAC(3,4) },
+	{ RGN_FRAC(3,4), RGN_FRAC(2,4), RGN_FRAC(1,4), RGN_FRAC(0,4) },
 	{ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 },
 	{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16,
 			8*16, 9*16, 10*16, 11*16, 12*16, 13*16, 14*16, 15*16 },
@@ -1909,7 +1909,7 @@ ROM_START( spikes91 )
 	ROM_LOAD( "5.ic74",   0x40000, 0x20000, CRC(d7fcd97c) SHA1(eb7c8ac111f5916350aae0ee3edc019207fef654) )
 	ROM_LOAD( "6.ic73",   0x60000, 0x20000, CRC(e6b9107f) SHA1(aaab2f2dfb85ee764091253c9a4ab89bc51d7518) )
 
-	ROM_REGION( 0x100000, REGION_GFX2, ROMREGION_DISPOSE )
+	ROM_REGION( 0x100000, REGION_GFX2, ROMREGION_DISPOSE | ROMREGION_INVERT )
 	ROM_LOAD( "11.ic118",   0x00000, 0x40000, CRC(6e65b4b2) SHA1(5296e8095ec60f79a5cd3f9db829c7d491670282) )
 	ROM_LOAD( "12.ic119",   0x40000, 0x40000, CRC(60e0d3e0) SHA1(93efc58b03610e7f18ff076ac985428a446454f9) )
 	ROM_LOAD( "13.ic120",   0x80000, 0x40000, CRC(89213a8c) SHA1(8524d5c14669d9b03f1fe050c4318d4111bc8ef7) )
diff --git a/src/mame/drivers/suprnova.c b/src/mame/drivers/suprnova.c
index 2fb44c198ba..17eed4f599e 100644
--- a/src/mame/drivers/suprnova.c
+++ b/src/mame/drivers/suprnova.c
@@ -187,7 +187,7 @@ NEP-16
 #include "deprecat.h"
 #include "sound/ymz280b.h"
 
-#define BIOS_SKIP 1 // Skip Bios as it takes too long and doesn't complete atm.
+#define BIOS_SKIP 0 // Skip Bios as it takes too long and doesn't complete atm.
 
 // Defined in video
 extern void skns_sprite_kludge(int x, int y);