Table of Contents
Advertisement
Scan Word 2
SW2F4
Transmit Character Flag
SW2F3
Code Level (5,6,7, or 8)
SW2F2
End-Hardware-Scan Flag
not used
x
x
18
17
16
15
14
13
12
SW2Fl
The character which is in the process
of being transmitted
1
SW2Fl is controlled entirely by hardware and requires no detail program control. The bits
are shifted right to the bit buffer channel and then to the line until the end-of-character bit is
in position 1. This occurs when SW2Fl is (000000000001).
SW2F2 is set to indicate the final bit buffer channel number when the program is initially as-
sembled and thereafter need not be considered.
It
is necessary to change SW2F2 for the final
channel for any change in the number of bit buffer channels:
1
this is the last bit buffer to be scanned.
0
continue scanning.
If
the final channel is not indicated, the SCN instruction will automatically end at channel 63.
SW2F3 defines for receive purposes the code level of the line (5, 6, 7, or 8) as follows:
SW2F3
(Bits 17 and 16)
17ji6
00
01
10
11
5-level code
6-level code
7-level code
8-level code.
This is set when the program is initially assembled (or changed octally) and thereafter need
not be considered.
SW2F4 is set by the hardware when the new transmit character is transferred from SWlFl
to SW2Fl.
It
is reset by the program after the new character is loaded into SWlFl.
@&lr&~~lr~ ~@------------
V-14
Advertisement
Table of Contents
