HP 3000 SERIES II System Service Manual page 51

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SELECTED REGISTERS
V-BUS CMD I/O
CLK LAMPS ON ADDRESS DEVNO. 10D lOP DATA CTL COMMENTS
110 SERVICE IN 3276 0 30 33 31 30 < lOP NOT 33, BAD lOP
SIO ACTIVE
DRT REQ
lOB ENABLE
DRT STORE
I/O HIRQ
I/O SELECT
111
SIO ACTIVE 3277 0 30 33 31 33 <DRT DOESN'T SET, BAD lOP
DRT REQ
lOB ENABLE
DRT STORE
I/O SELECT
112
3275 0 30 33 0 -
113
DATA POLL 3276 0 30 33 0
-
114
DATA POLL 3277 0 30 33 0
-
115
DATA POLL 3275 0 30 33 31 -
116
SERVICE IN 3276 0 31 33 0
-
SIO ACTIVE
I/O LORQ
117
SIO ACTIVE 3277
0 31
33 0
31
I/O WAIT
I/O SELECT
118 SIO ACTIVE 3275 0 31
33
0
-
I/O WAIT
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