Direct Read For Terminal Devices - HP 3000 III Series Manual

I/O System
DISPATCHER
USER
PROCESS
File Request
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+ .. •
Other Processes
DATA
BUFFER
FILE
SYSTEM
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I
I
Check
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Results
,
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: Update
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DEVICE DRIVER
ICS
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OBI
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ILT
-,
9
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Data
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DIT
14-
1
----
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-------
IXIT
To
4 - - - " 1
Dispatcher
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__________
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..2..
1
INTERRUPT
ROUTINE
'(TIP)
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- j
DRT ENTRY
Not Used
Ext. Prog. Label
OBI Pointer
f-
Reserved
DEVICE
CONTROLLER
8
Interrupt
Control
ZI
..JI
Stack
Figure 7-6. Direct Read For Terminal Devices
7-10