RCA 70/700 Series Reference Manual page 123

Table 3-5 Operational Word 1 (OW-I)
Bit Function
5,4
(Cont'd)
6
(sequence
counter
control)
8, 7
(sequence
counter
modifica-
tion)
OW-l
Three bit settings only are allowed for bits 5, 4:
00 Do not set or reset in data block bit
13 of LSW-C.
01 Set In data block bit 13 of LSW-C to 1.
10 Reset In data Block bit 13 of LSW-C to O.
Bit 6 controls changes to the sequence counter as
follows:
o
1
When the condition for action specified
oy bits 2, 1, 0 is satisfied, the sequence
counter is reset and any setting of bits
8, 7, is ignored.
When the condition for action is not satisfied,
the· operation specified by bits 8, 7 is per-
formed. (Hardware resetting of the sequence
counter may take place before the action of
bits 8,7. See OW-l bits 2,1,0
=
100, 101).
Resetting the sequence counter as called for
by bits 8, 7
=
00 is prevented, but
any
other
operation called for by bits 8; 7 is permitted.
Bits 8, 7 change the settings of the sequence counter
(LSW F bits 15, 16) based on the conditions for
action (bits 2, 1, 0) being satisfied and the setting
of bit 6. See bit 6 for a complete description of
the conditions under which action will be taken on the
following bit configurations:
5