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Bit
6,7,8,
9,10,11
(unused)
13,12
(special
buffer
control)
14
(Reset LSW
B 15 Feature
5623 only)
16,15
(unused)
17
(parity)
OW-2
Table 3-6
00
01
10
11
o
1
Operational Word 2 (OW-2)
Function
Not used.
(Set to zero)
These bits are used for special buffer control
of special systems such as the Data Gathering
System (DGS); bits 13,12 take action only when
permitted by action control.
No action.
If LSW B 16 is zero
(no error recorded),
send an ACK (acknowledge)
command to the buffer.
Send a DISC (disconnect)
command to the buffer.
Use
this bit setting only with
7'0/724 and
70/725
buffers!'
Do not use this bit
setting~
Subject to action
control bits
When Feature 5623 is installed and when per-
mitted by action control, bit 14 may be used
to reset LSW B 15 to zero to indicate an un-
shift status by the control character accessing
this Op Word.
This function might be used for
any shift control system but is particularly
useful for Baudot teletype systems in which the
unshift on SPACE and LTRS option has been in-
cluded.
A SPACE character can access an Op Word pair
which has bit 14 of OW-2 set which will cause
an unshift status by
r~setting
LSW B 15 to
zero.
No action.
When permitted by action control, indicate an
unshift status by resetting LSW B 15 to zero.
Not used.
Odd parity for the Op Word is set by hardware
upon loading, and is checked upon each access.
(See OW-l bit 17 for details)
10
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