===== 01 REG MDEC REGISTERS | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 00000480
Status after reset, read twice: 80040000 80040000
Control 60000000, then status 80040000
Control 40000000, then status 80040000
Control 20000000, then status 80040000
Control 00000000, then status 80040000
Control 1FFFFFFF, then status 80040000
Control 7FFFFFFF, then status 80040000
Command 00000000: status 80040000; command 0 after it: 80040000
Command 0000FFFF: status 8004FFFF; command 0 after it: 80040000
Command 1E001234: status 87841234; command 0 after it: 80040000
Command 01FF5678: status 80045678; command 0 after it: 80040000
Command 80000001: status 80040001; command 0 after it: 80040000
Command 9FFFFFFF: status 8784FFFF; command 0 after it: 80040000
Command A0000002: status 80040002; command 0 after it: 80040000
Command C0000003: status 80040003; command 0 after it: 80040000
Command E0008000: status 80048000; command 0 after it: 80040000
Command FFFFFFFF: status 8784FFFF; command 0 after it: 80040000
Data port read 4 times after reset: 0621FFFC 3C048010 3C048010 3C048010, status 80040000
The same with both requests enabled: 60000000 24630004 24630004 24630004, status 80040000
8 bit block decoded, 16 words read, last 0F163232; then 4 reads: 1440FFFB 3C038012 3C038012 3C038012, status 8204FFFF
Status after the last reset: 80040000
Done.