unibios error on ss4

can any one help ive got the unibios 3.0 in my aes.

when im playing sam spirits 4 randomly it will come up with this message-

exception error handling

illegal instruction

address 00001d4a

do;00000100
d1:00000000
d2:00000000
d3:000000dc
d4:ffff00a0
d5:00000000
d6:ffff0000
d7:00000fff

ssp:edffff77
sp2000

any ideas cus its really doing my head in.

thanks

btw-its acorean cart if that makes any diffrence.

clean the cart contacts.