Epson 1500 - Manual (Page 169)

Interface Specifications
The printer has the following resident interfaces:
Parallel
RS-232C serial (ActionLaser 1500 only)
Parallel interface
Your printer is equipped with an 8-bit parallel interface.
Parallel interface pin assignments
The parallel interface connector pin assignments and a
description of the interface signal are shown in the table below.
Description
This STROBE pulse to read
data in. Pulse width must
be more than 0.5
microseconds at the
receiving terminal.
These signals represent
parallel data bits 1 to 8,
respectively. Each signal is
at HIGH level when data
is logical 1 level and at
LOW when it is logical 0.
Technical Specifications A-9