Data Bits; Stop Bits; Parity; Data Terminal Ready - IBM 6400 Setup Manual

2400 BAUD
4800 BAUD
9600 BAUD (the default)
19200 BAUD
38400 BAUD
57600 BAUD
115200 BAUD

Data Bits

The DATA BITS parameter sets the length of the serial data word. The length
of the data word must match the corresponding data bits setting in the host
computer.
8 BITS (the default)
7 BITS

Stop Bits

The STOP BITS parameter sets the number of stop bits in the serial data
word. The setting must match the corresponding stop bit setting in the host
computer. One (1, the default) or two (2) stop bits can be selected.

Parity

The PARITY parameter setting can be set for the following:
NONE (the default)
ODD
EVEN
MARK
SENSE
The setting must match the corresponding parity setting in the host computer.

Data Terminal Ready

This configuration is part of hardware flow control and determines when the
DATA TERMINAL READY (DTR) signal is generated. This signal indicates
whether or not the printer is ready to receive data.
READY AND BUFFER NOT FULL (the default) asserts the DTR signal
when the printer is READY and the internal serial buffer is not full.
NOT READY OR BUFFER FULL asserts the DTR signal when the
printer is NOT READY or the internal serial buffer is full.
Chapter 4. Configuration Menus 4–55