diff --git a/src/mess/drivers/pcd.c b/src/mess/drivers/pcd.c
index 691c8b3e324..06f3565e543 100644
--- a/src/mess/drivers/pcd.c
+++ b/src/mess/drivers/pcd.c
@@ -537,8 +537,12 @@ MACHINE_CONFIG_END
 
 ROM_START( pcd )
 	ROM_REGION(0x4000, "bios", 0)
-	ROM_LOAD16_BYTE("s26361-d359.d42", 0x0001, 0x2000, CRC(e20244dd) SHA1(0ebc5ddb93baacd9106f1917380de58aac64fe73))
-	ROM_LOAD16_BYTE("s26361-d359.d43", 0x0000, 0x2000, CRC(e03db2ec) SHA1(fcae8b0c9e7543706817b0a53872826633361fda))
+	ROM_SYSTEM_BIOS(0, "v2", "V2 GS")  // from mainboard SYBAC S26361-D359 V2 GS
+	ROMX_LOAD("s26361-d359.d42", 0x0001, 0x2000, CRC(e20244dd) SHA1(0ebc5ddb93baacd9106f1917380de58aac64fe73), ROM_SKIP(1) | ROM_BIOS(1))
+	ROMX_LOAD("s26361-d359.d43", 0x0000, 0x2000, CRC(e03db2ec) SHA1(fcae8b0c9e7543706817b0a53872826633361fda), ROM_SKIP(1) | ROM_BIOS(1))
+	ROM_SYSTEM_BIOS(1, "v3", "V3 GS4") // from mainboard SYBAC S26361-D359 V3 GS4
+	ROMX_LOAD("361d0359.d42", 0x0001, 0x2000, CRC(5b4461e4) SHA1(db6756aeabb2e6d3921dc7571a5bed3497b964bf), ROM_SKIP(1) | ROM_BIOS(2))
+	ROMX_LOAD("361d0359.d43", 0x0000, 0x2000, CRC(71c3189d) SHA1(e8dd6c632bfc833074d3a833ea7f59bb5460f313), ROM_SKIP(1) | ROM_BIOS(2))
 
 	// gfx card (scn2674 with 8741), to be moved
 	ROM_REGION(0x400, "graphics", 0)