Measurement Computing Parallel488 - Manual (Page 22)

Section 3 Parallel To IEEE Operation
3.4
By typing the following HPGL command on the keyboard, the plotter
should respond by retrieving its pen, drawing a line and returning the pen.
SP1;PA1000,1000;PD;PA1000,6000;PU;SP0;
3.5 Printer Applications
Most of the information given for plotter applications applies to
applications for interfacing IEEE 488 printers to a parallel host. Some high end
printers have a secondary command setting which must be disabled for the
Parallel488 to control them. The Parallel488 does not use secondary commands
to control IEEE peripherals, such as printers or plotters. Refer to the printer's
instruction manual if the is a question as to whether the printer requires
secondary commands.
3.6 Parallel Interface Description and Timing
As a parallel to IEEE converter, the Parallel488 controls the following
signals (designated as out in the following table) and responds to the signals
(designated as in).
Pin Signal Direction Description
1 STROBE in When a low pulse is sent by the parallel
device (>0.5 µs), the Parallel488 reads
the character on the data lines and places
it in the IEEE output buffer.
2 DATA0 in Least significant data bit 0 (high=logic "1")
3 DATA1 in Data bit 1
4 DATA2 in Data bit 2
5 DATA3 in Data bit 3
6 DATA4 in Data bit 4
7 DATA5 in Data bit 5
8 DATA6 in Data bit 6
9 DATA7 in Most significant data bit 7