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1443 PRINTER
Commands
Bit
Command
0
1
2
3
I
4
5
Write
M
M
M
M
M
0
0
1
Control (Skip or Space)
M
M
M
M
M
0
1
1
Test I/O
0
0
0
0
0
0
0
0
Sense
0
0
Q
0
0
0
0
Diagnostic Read
0
0
0
0
0
0
Diagnostic Write
1
0
0
0
1
1
0
Diagnostic Control
1
0
1
0
1
Modifiers for Write and Control
Bit
Operation
0
1
2
3
4
Space 1 Line
0
0
0
0
1
Space 2 Lines
0
0
0
0
Space 3 Lines
0
0
1
1
Skip to Channel 1
0
0
0
Skip to Channel 2
0
0
1
0
Skip to Channel 12
1
1
0
0
Carriage Operation on a Write is a space or skip after print. On
a Control, it is an immediate.
Status Byte
Bit
Name
Description
0, 1, 2
Not Used
Busy
Command stored or status stacked.
4
Channel End
5
Device End
6
Unit Check
Channel 9 sensed in carriage tape.
Unit Exception
Channel 12 sensed in carriage tape.
72
S/360
IBM CONFIDENTIAL
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