(Type=don't care)
Offset Read Write | Offset Read Write
00 Control Control | 40 T0 count low T0 latch low
04 Kbd receive Kbd send | 44 T0 count high T0 latch high
08 - - | 48 - T0 Go command
0C - - | 4C - T0 Latch command
10 IRQ status A - | 50 T1 count low T1 latch low
14 IRQ request A IRQ clear | 54 T1 count high T1 latch high
18 IRQ mask A IRQ mask A | 58 - T1 Go command
1C - - | 5C - T1 Latch command
20 IRQ status B - | 60 T2 count low T2 latch low
24 IRQ request B - | 64 T2 count high T2 latch high
28 IRQ mask B IRQ mask B | 68 - T2 Go command
2C - - | 6C - T2 Latch command
30 FIQ status - | 70 T3 count low T3 latch low
34 FIQ request - | 74 T3 count high T3 latch high
38 FIQ mask FIQ mask | 78 - T3 Go command
3C - - | 7C - T3 Latch command
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