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Address
091
OBH
(Mode-Register)
00
01
10
11
~
OCH
(software command)
ODH
(software command)
697
OEH
(software command)
00
01
10
11
OFH
(software command)
021H
0 - 7
Bit
1
Bit data
IMR
4
xx
I -
0/1
5
I
0/1
0 - 7
1
x
0 - 7
1
x
I
INTERRUPT CONTROLLER
Description
Selection of channel 0
Selection of channel 1
Selection of channel 2
Selection of channel 3
Verify transfer
Write transfer (I/O to Memory)
Read transfer (Memory to I/O)
Illegal
In case of bit 6,7=11
~
Auto initialize disable/enable
Address increment/decrement
Demand mode
Single mode
Block mode
Cascade mode
Clear First/Last flip flop
Read of temporary register/Master clear
_ _
Clear Mask register
All Mask register
Address
I
Bit
I
Bit data
1
Description
I
IRR
&
ISR
F-2
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Troubleshooting
