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27 02 TRANSMISSION CONTROL
Command Decoding
LCW
LCW
LCW
Channel
2702
Command Byte In put
Command
Mode
TC
Command
Command
to 2702
(Bus
Jn)
Field
Field
Field
p
0 1 2 3 4 5
4
5 6 7
4
2 1 2 1
Sense
Sense
0 0 1 0
Write
Write
Auto Wrap
0 0 0 0 0 1
1 0 1 0 1
Dial*
1 1
0 1 0
Break
0
0 0 0
0
1
1
0 1 1 1 0
1
Poll
1 0
1 1
0 0
Read
Read
0 1
Prep Rd
Inhibit
1
0
0 0 1 0
1 0 1 0 1
Search
0 1
Control
SADZER
SADONE
0 1
0 1 1 1 0
SADTWO
0 1 1 0 1 1
0 0 1 1 0
1 0
SADTHREE 0 0 0 0 1 1 1 1 1 0 0 1 1 0
1
1
Enable
1 0
1 0 0 1 1 1 0 0 1 1
0 0 1
Disable
0 1 1 1 1 0
1 1
1 1
No-Op
1 0
1 1
Pseudo
1
1 1 1
*
Decoded by channel as write command and by 2702 as control command.
IBM CONFIDENTIAL
S/360
75
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