IBM 6400-D Generation II Series, Setup Manual

Page: 107 / 184

PC Parallel Menu
107
Data Bit 8
The DATA BIT 8 parameter allows access to the extended ASCII character
set. This parameter is Enabled by default. When this parameter is Disabled,
the printer interprets bit 8 of each incoming data character as a zero,
regardless of its actual setting.
Data Polarity
The DATA POLARITY parameter must be set to match the data polarity of
your host computer.
•
STANDARD (the default) does not expect the host computer to invert the
data.
•
INVERTED expects the host computer to invert the data received on the
data lines. Ones become zeros, and vice–versa.
Strobe Polarity
The STROBE POLARITY must be set to match the data strobe polarity of
your host computer. When the host computer sends a data strobe signal to
the printer, this enables the printer to read the data bus.
•
STANDARD (the default) does not expect the data strobe signal to be
inverted.
•
INVERTED expects the host computer to invert the data strobe signal.
Response Polarity
The RESPONSE POLARITY parameter must be set to match the response
polarity of your host computer.
•
STANDARD (the default) does not invert the response signal.
•
INVERTED inverts the response signal sent to the host computer.
Busy on Strobe
BUSY ON STROBE determines when the Busy signal is asserted.
•
ENABLE (the default) asserts a busy signal after each character is
received.
•
DISABLE asserts a busy signal only when the print buffers are full.
Latch Data On
The LATCH DATA ON parameter specifies whether the data is read on the
leading or trailing edge of the data strobe signal.
•
LEADING EDGE (the default)
•
TRAILING EDGE