IBM 3164 ASCII Manual page 136

44
Print EOl
45
Print Data Null Suppression
46 Monitor Printer Status
This option is used to determine whether to generate the Line End
Character at the end of the printed line or not, when the printed data
length is equal to the viewport width (for Print Viewport), the screen
width (for Print Screen), or the page width (for Print
Page/Message/Line). If this option is off, no line end character will be
inserted even though the above conditions are met. If this option is on,
the line end character (CR.lF or CR) specified by the Line End Character
Selection is sent to the printer.
When this parameter is on, the trailing nulls are suppressed during a
buffer printout. Trailing nulls are null characters between the last
significant character and the end-of-line (the cursor for Print Message).
The following table shows the relationship between the Null
Suppression, Print EOl, and Line End Character Selection options:
Print
EOl
Option
legend:
ON
Print Data Null Suppression
Off
II
=
WD
Line End Character
(CR.lF or CR)
~----+-----------------------~
OFF No line End Character
l l : The actual print data length
WD: Page width (for Print Page),
ON
II
< WD
Line End Character
(CR.lF or CR)
Screen width .(for Print Screen), or
Viewport width (for Print Viewport)
In order to monitor the status of the printer or the IBM 3164 attached to
the auxiliary port two EIA level signals are available. They are; the
Printer Status (pin 11 of the printer) and DTR (pin 20 of the printer)
signals.
These two signals can be monitored on pins 11 and 20 of the auxiliary
port.
The following figure shows a typical connection to monitor these two
signals.
3164 Main Port
Aux.Port
or Printer
FG 1
1 FG
SG 7
7
SG
TXD 2 2
TXD
RXD 3 3 RXD
RTS
4 4 RTS
CTS 5
5 CTS
DSR 6
6
DSR
DCD 8
8 DCD
DTR 20
20 DTR
Printer Printer
Status 11
11
Status
- - - 3 1 6 4
~I.
Cable
~I.
Aux.
- -
Device
5-49