IBM Infoprint 1125 User Reference page 165

RS-422 Polarity
Purpose:
To establish the behavior of the positive and negative signals when using RS-422 serial
communication.
Values:
Normal*
Reverse
See also:
Serial Buffer
Purpose:
To configure the size of the serial input buffer.
Values:
Disabled
Auto*
3K to maximum
size allowed
See also:
Resource Save
Argecy Computer Corporation 248-324-1800
Uses default definition of one and zero.
Reverses the definition of one and zero, thereby allowing a positive connection to a
host's negative terminal without changing the physical cable.
Disables the serial port.
Printer automatically calculates the Serial Buffer size (recommended setting).
User specifies the Serial Buffer size. The maximum size depends on the
amount of memory in your printer, the size of the other link buffers, and
whether Resource Save is set to On or Off. To maximize the range for the
Serial Buffer size, disable or reduce the size of the parallel, infrared, LocalTalk,
and USB buffers.
Note: Changing the Serial Buffer menu item automatically resets the printer.
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