16 Dec
2015
16 Dec
'15
9:59 a.m.
Tony, good advice but probably more work than I'm inclined to put in.
What I have suggested would take about 10 minutes tops. It has probably
taken me longer to type this message than it would take me to figure
that out.
As you said there were many interfaces with different
standards -
different polarities and timing - and either way it's quite likely
Based on Brent's schematic and the date I wonder if it is similar
to the HP9866 interface. The connector is wrong, but the signals
(7 data lines, strobe, ready, paper out) are right. And it is a
machine that was around at the time. Possibly this was to get
letter quality output that didn't fade from some machine designed
to use that printer.
this will never work with a standard modern parallel
port without
building some converter, after first finding out what has to be
converted and designing it!
Probably just a matter of inverting some of the signal lines (i.e. '04s)
-tony