IBM Series 1 User Manual page 183

Figure 6-1. Block diagram of the customer Direct Program
Control Adapter feature
USER'S ATTACHMENT
(I/O DEVICES)
Data bus out
Data bus in
Control lines
Interrupt request in
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l
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6-2
GA34-0033
1\
V
DPC ADAPTER FEATURE
Output
drivers
Input
terminators
Output
drivers
Terminators
and priority
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' "
A
N
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V
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rv
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7-
Diagnostic
register
,
Bus drivers
and
bus receivers
Control
logic
Interrupt
control
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I/O CHANNEL
Data bus
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,. ..
.....
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Address bus
r
..
....
Request in bus
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