diff --git a/src/mame/drivers/taitogn.c b/src/mame/drivers/taitogn.c
index 90d9ad9656b..dca90d0f54b 100644
--- a/src/mame/drivers/taitogn.c
+++ b/src/mame/drivers/taitogn.c
@@ -965,14 +965,14 @@ ROM_START(psyvaria)
 	TAITOGNET_BIOS
 
 	DISK_REGION( "card" )
-	DISK_IMAGE( "psyvaria", 0,  SHA1(a80e164c09d795085b65659d1df60710530549c3))
+	DISK_IMAGE( "psyvaria", 0,  SHA1(b981a42a10069322b77f7a268beae1d409b4156d))
 ROM_END
 
 ROM_START(psyvarrv)
 	TAITOGNET_BIOS
 
 	DISK_REGION( "card" )
-	DISK_IMAGE( "psyvarrv", 0, SHA1(c12f0d5cbb6ec7f906e3dcdc3047c22de36457a5))
+	DISK_IMAGE( "psyvarrv", 0, SHA1(277c4f52502bcd7acc1889840962ec80d56465f3))
 ROM_END
 
 ROM_START(zooo)
@@ -995,7 +995,7 @@ ROM_START(nightrai)
 	TAITOGNET_BIOS
 
 	DISK_REGION( "card" )
-	DISK_IMAGE( "nightrai", 0, SHA1(7a4d62018fd19ccbdec12b6d24052d49f8a8359e))
+	DISK_IMAGE( "nightrai", 0, SHA1(74d0458f851cbcf10453c5cc4c47bb4388244cdf))
 ROM_END
 
 ROM_START(otenki)
@@ -1027,7 +1027,7 @@ ROM_START(xiistag)
 	TAITOGNET_BIOS
 
 	DISK_REGION( "card" )
-	DISK_IMAGE( "xiistag", 0, SHA1(8e0b2ee88edf0b45b3b4063d65eae236c12ee8ff))
+	DISK_IMAGE( "xiistag", 0, SHA1(586e37c8d926293b2bd928e5f0d693910cfb05a2))
 ROM_END