HP 3000 SERIES II System Service Manual page 54

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SELECTED REGISTERS
V-BUS CMD
I/O
CLK
LAMPS ON ADDRESS DEVNO. 10D lOP DATA CTL COMMENTS
141 SIO ACTIVE 3277 1000
30 33 0 30
DRT REQ
I/O WAIT
I/O SELECT
142 SIO ACTIVE 3275 1000 30 33 0
-
DRT REQ
I/O WAIT
143
SIO ACTIVE 3276 1000 30 33 0
-
DRT REQ
I/O WAIT
144
SIO ACTIVE 3277 1000 30 33 0 33
DRT REQ
I/O WAIT
145
SIO ACTIVE 3275 1000 30 33 33
-
DRTREQ
lOB ENABLE
DRT STORE
146 SERVICE OUT 3276 1000
30 33 33
-
SIO ACTIVE
DRT REQ
lOB ENABLE
DRT STORE
I/O LORQ
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