RCA 70/700 Series Reference Manual page 35

C
(1st) - Second
Character of Start
of Message
Sequence
(Cont'd.)
Z (2nd) - Third
Character of Start
of Message
Sequence
C
(2nd) - Fourth
Character of Start
of Message
Sequence
CCM Initialization
4 -
o
C should not set NDB.
5 -
o
C should not reset NDB.
6 -
o
Do not inhibit resetting of sequence
counter.
8,7
-
11 trigger sequence counter.
12-9 - 0000 No action by CRB.
13 -
o
Do not terminate existing command
(Receive).
14 -
o
Exclude this character from BP count.
15 -
1 Ignore C so that it will not be passed
to memory.
16 -
o
OW -2 not required.
17 - Parity.
• 1. Receive/Transmit setto 1 - present onlywhen receiving NDB set to
o -
system should be out of data block when Z is received. Sequence
counter set to 10.
2. OW -1 Bit Settings:
2, 1, 0 (Action control) - 001, unconditional action.
3 - 0 Not Used.
4 - 0 Z should not set NDB.
5 - 0 Z should not reset NDB.
6 - 0 Do not inhibit resetting of sequence
counter.
8, 7 - 11 Trigger sequence counter.
12-9 - 0000 No action by CRB.
13 - 0 Do not terminate existing command
(Receive).
14 - 0 Exclude this character from BP count.
15 - 1 Ignore Z so that it will not be passed
to memory.
16 - 0 OW-2 not required.
17 - Parity.
• 1.
Receive/Transmit set to 1 - present only when receiving NDB set to
o -
system should be out of data block when Z is received. Sequence
counter set to 11 prior to the time Z is received.
2. OW -1 Bit Settings:
2, 1, 0 (Action Control) 001, unconditional action.
3 - 0 Not used.
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