===== 01 RC1 TIMER MODE READBACK | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 00000480
Timer modes at the start: 1C00 1D00 1C00, targets 0000 0000 0000
Each mode bit written alone, then two reads:
Timer0 write 0001: read 0401 then 0401
Timer0 write 0002: read 0402 then 0402
Timer0 write 0004: read 0404 then 0404
Timer0 write 0008: read 0408 then 0408
Timer0 write 0010: read 0410 then 0410
Timer0 write 0020: read 0420 then 0420
Timer0 write 0040: read 0440 then 0440
Timer0 write 0080: read 0480 then 0480
Timer0 write 0100: read 0500 then 0500
Timer0 write 0200: read 0600 then 0600
Timer0 write 0400: read 0400 then 0400
Timer0 write 0800: read 0400 then 0400
Timer0 write 1000: read 0400 then 0400
Timer0 write 2000: read 0400 then 0400
Timer0 write 4000: read 0400 then 0400
Timer0 write 8000: read 0400 then 0400
Timer0 write 0000: read 0400 then 0400
Timer1 write 0001: read 0401 then 0401
Timer1 write 0002: read 0402 then 0402
Timer1 write 0004: read 0404 then 0404
Timer1 write 0008: read 0408 then 0408
Timer1 write 0010: read 0410 then 0410
Timer1 write 0020: read 0420 then 0420
Timer1 write 0040: read 0440 then 0440
Timer1 write 0080: read 0480 then 0480
Timer1 write 0100: read 0500 then 0500
Timer1 write 0200: read 0600 then 0600
Timer1 write 0400: read 0400 then 0400
Timer1 write 0800: read 0400 then 0400
Timer1 write 1000: read 0400 then 0400
Timer1 write 2000: read 0400 then 0400
Timer1 write 4000: read 0400 then 0400
Timer1 write 8000: read 0400 then 0400
Timer1 write 0000: read 0400 then 0400
Timer2 write 0001: read 0401 then 0401
Timer2 write 0002: read 0402 then 0402
Timer2 write 0004: read 0404 then 0404
Timer2 write 0008: read 0408 then 0408
Timer2 write 0010: read 0410 then 0410
Timer2 write 0020: read 0420 then 0420
Timer2 write 0040: read 0440 then 0440
Timer2 write 0080: read 0480 then 0480
Timer2 write 0100: read 0500 then 0500
Timer2 write 0200: read 0600 then 0600
Timer2 write 0400: read 0400 then 0400
Timer2 write 0800: read 0400 then 0400
Timer2 write 1000: read 0400 then 0400
Timer2 write 2000: read 0400 then 0400
Timer2 write 4000: read 0400 then 0400
Timer2 write 8000: read 0400 then 0400
Timer2 write 0000: read 0400 then 0400
Timer0 target write FFFF reads FFFF, 0 reads 0000, 32 bit ABCD1234 reads 1234, upper half of a 32 bit read 0C04
Timer1 target write FFFF reads FFFF, 0 reads 0000, 32 bit ABCD1234 reads 1234, upper half of a 32 bit read 0000
Timer2 target write FFFF reads FFFF, 0 reads 0000, 32 bit ABCD1234 reads 1234, upper half of a 32 bit read 0000
Done.