===== 04 IP2 CAUSE IP2 | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 00000480
SR 40000400 CAUSE 30000000 with interrupts off here
I_STAT.3 set, I_MASK 0: CAUSE 30000000
I_MASK 8: CAUSE 30000400
SR Im all 0 (SR 40000000): CAUSE 30000400
I_MASK 0 again: CAUSE 30000000
mtc0 CAUSE FFFFFFFF: 30000300; then 0: 30000000
mtc0 CAUSE 00000400 with no IRQ: 30000000
IP2 after sh I_MASK=8 (I_STAT.3 set), n nops: 0:0 1:0 2:1 3:1 4:1 6:1
IP2 after sh I_MASK=8 (I_STAT.3 set), n nops: 0:0 1:0 2:1 3:1 4:1 6:1
IP2 after sw I_STAT=0 (was set, I_MASK 8), n nops: 0:1 1:1 2:0 3:0 4:0 6:0
IP2 after sw DICR force (I_MASK 8), n nops: 0:0 1:0 2:0 3:0 4:1 6:1
I_STAT.3 after all that, acked: 0; CAUSE 30000000
Done.