Data Polarity - Printronix T4204 User Manual

Chapter 3
Menu Options
Centronics (Parallel)
CENTRONICS
(from page 54)
Data Bit 8
PI Ignored
Enable* Enable*
Disable Disable
Prime
TOF Action
Signal
Enable* Reset*
Disable Do Nothing
Data Bit 8
•
Enable. Allows access to the extended ASCII character set.
•
Disable. The printer interprets bit 8 of each incoming data character as a
zero, regardless of its actual setting.
PI Ignored
The PI (Paper Instruction) signal is used to control vertical paper motion.
•
Enable. Ignores the PI signal and treats the data as characters or control
codes.
•
Disable. Causes the printer to interpret the eight data lines as VFU
commands when the PI signal is true.

Data Polarity

The Data Polarity parameter must be set to match the data polarity of your
host computer.
•
Standard. Does not expect the host computer to invert the data.
•
Inverted. Expects the data received on the data lines from the host
computer to be inverted. Ones become zeros, and vice versa.
80
Resp.
Data Polarity
Polarity
Standard* Standard*
Inverted Inverted
Buffer Size
In K
8*
1-16
* = Factory Default
Busy On Latch
Strobe Data On
Enable* Leading*
Disable Trailing