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RCA 70/46 - Page 63

RCA 70/46
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Set
Condition
Code
to
3
and
Terminate
Halt
Device
Instruction
Next
Instruction
No
No
Set
Condition
Code
to
o
and
Terminate
Halt
Device
Instruction
Next
Instruction
2
3
4
5
6
Start
Is
Privileged
Mode
Bit
Set
to
Zero?
Yes
Is
Specified
Selector
Channel
on
System?
Yes
Is
Specified
Channel:
1.
Busy
Selector
Channel
2.
Multiplexor
Channel
in
Burst
No
Is
Specified
Channel
the
Multiplexor?
Yes
Reset
the
Channel
Status
Byte
and
the
Standard
Device
Byte
to
Zero
Send
Device
Address
to
All
Trunks
on
Multiplexor
Channel
No
Yes
Input/Output Operation
Tell
Devi
ce
to
Set
an
End
Condition;
Reset
Chain
Command
(CC)
Flag
in
CCR-II
in
Scratch
Pad
Memory
Set
Condition
Code
to
2
and
Terminate
Halt
Device
Instruction
Next
Instruction
Figure
6.
Functional Logic
of
Halt Device Instruction
54

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