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Reference Information
Table 3-6. Operational Words OW-2
(Cont'd)
Bit
CCM Action
11, 10
Not used.
13, 12
Special buffer control:
2 13
212
0
0
No action.
1
0
Generate DISC command to buffer.
0
1
Generate ACK command to buffer if LSW bit B16 is reset.
1
1
Not used.
16, 15,
Not used.
14
17
Parity.
Table 3-7. Communication Reporting Byte (CRB)
Bit Configuration
Meaning
27 2 6 2 5 24 2 3 22 21 2 0
0
0
0
0
0
0
0
0
No CM required.
X
X
X
X
0
0
0
1
Good message.
X
X
X
X
0
0
1
0
Bad message.
X
X
X
X
0
0
1
1
Bits (2 0 - 2 3 ) are variable by the program and may be set
in each operational word to give any desired indication.
X
X
X
X
1
1
1
1
0
1
0
0
X
X
X
X
Buffer malfunction.
0
1
0
1
X
X
X
X
Overlay - character received from buffer before previous
character transferred to the processor.
0
1
1
0
X
X
X
X
Optional buffer report 1 (LDR for 70/715 Parallel Buffer.)
1
0
1
0
X
X
X
X
Buffer error.
1
1
0
1
X
X
X
X
Ring report.
1
1
1
1
X
X
X
X
Time-out.
0
1
1
1
X
X
X
X
Optional buffer report 2.
~~/
~~/
Set by operational word.
Set by buffer report.
3-19
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