Specifications

Chapter 9
CENTRONICS PRINTER INTERFACE
Contents Page
OVERVIEW ..................................................... 9-1
PRINTER PORT OUTPUT CHARACTERISTICS
................... 9-3
USING THE PRINTER PORT
..................................... 9-4
REGISTER DEFINITIONS/ADDRESSES
.......................... 9-5
Data Port
.................................................... 9-6
Status Port
................................................... 9-7
Control Port
................................................. 9-8
Interrupt Capability
....................................... 9-9
Shared Signals
.......................................... 9-10
DISABLING SHARING OF PRINTER PORT SIGNALS
........... 9-12
OPTIONAL PRINTER CABLE PINOUT
.......................... 9-14
PRINTER PORT RESET STATE
................................. 9-15
OVERVIEW
This chapter provides a descsription of the Centronics printer
interface, instructions for using the printer port, register definitions
and addresses, and information on dedicating the shared printer port
signals to printer use only. It also includes the pinout for the optional
ZT 90039 printer port cable and a summary of the effect of system
reset on the printer port.
9-1