===== 01 EN4 HANG RISK 4 | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 1F801DAA

The step that may hang the console, after the one that did:
sw BF800100: exception no 0, scratchpad 1F800100 now 5C4A0001
Done.