IBM 6400-D Generation II Series, Руководство по установке

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Chapter 5
PC Parallel Interface
PC Parallel Interface Signals
The PC Parallel interface signals between the host computer and the printer
are defined as follows:
Data Lines 1 through 8 — Provide eight standard or inverted levels from the
host that specify character, data, plot data, or function code. Data Line 8
allows access to the extended ASCII character set. You may enable or
disable this line via the Data Bit 8 parameter on the System Interface
Parameters and PC Parallel submenus.
Data Strobe — Carries a low true, 100 ns min. pulse from the host that clocks
data into the printer.
Paper Instruction (PI) —Carries a VFU control signal from the host with the
same timing as the data lines.
Acknowledge — A low true pulse from the printer indicating the character or
function code has been received and the printer is ready for the next data
transfer.
Online/Select — A high true level from the printer to indicate the printer is
ready for data transfer and the Start key on the operator panel has been
activated. When the printer is in Ready mode, it may accept data from the
host.
Paper Empty (PE) — A high true level from the printer to indicate the printer
is in a fault condition.
Busy — A high true level from the printer to indicate the printer cannot
receive data.
PC Parallel Interface Configuration
Your printer is configured at the factory to match the interface you specified.
By using the operator panel, you may verify and change several interface
parameters in order to meet specific application requirements.
Refer to Chapter 4, “Configuration Menus,” for PC Parallel parameter
descriptions and information on selecting values for the following parameters:
•
Data Bit 8 (enable or disable)
•
Data Polarity (standard or inverted)
•
Strobe Polarity (standard or inverted)
•
Response Polarity (standard or inverted)
•
Busy on Strobe (enable or disable)
•
Latch Data On Leading or Trailing Edge of Strobe
•
Prime Signal (enable or disable)
•
TOF Action at Prime Signal (do nothing or form feed)
•
Buffer Size in kilobytes (1 to 16)
Some application programs require a unique configuration. If the printer is not
working properly in the configuration you have selected, contact an IBM
service representative.