RadiSys EPC - 6A Hardware Reference Manual page 27

EPC-6A Hardware Reference
Port
0A
0B
0C
0D
0E
0F
20
21
24
26
40
41
42
43
60
61
64
70
71
80
81
82
83
87
89
18
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Functional group Usage
Command register (R)
Single-bit DMA request mask(W)
Mode
Set byte pointer (R)
Clear byte pointer (W)
Temporary register (R)
Master clear (W)
Clear mode reg counter (R)
Clear all DMA req mask(W)
All DMA request mask
Interrupt controller 1 Port 0
Port 1
83000 Controller Data register
Index register
Timer Counter 0
Counter 1
Counter 2
Control (W)
Keyboard controller Data I/O register
NMI status NMI status
Keyboard controller Command/status register
Real-time clock RTC index reg / NMI enable
RTC data register
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
...
3F
BIOS debug port
DMA Channel 2 page register
Channel 3 page register
Channel 1 page register
Channel 0 page register
Channel 6 page register
seconds
seconds alarm
minutes
minutes alarm
hours
hours alarm
day of week
date of month
month
year
status A
status B
status C
status D
RAM
RAM