[comp.sys.ibm.pc.misc] HP Laserjet II/III external port

mjf@well.sf.ca.us (Marty Fried) (06/03/91)

I am seeking information about the external port on the HP Laserjet II/III.
This is the one used by Tall Tree for their JLaser card.  I work for a
company that does presentation graphics system, and used this port on the
Laserjet II somehow, figuring it out without documentation.  It doesn't
work the same for the III, and I would like to get any information I can to
help get it working.  Mainly I need info on the III, or differences between
the II and III in their use of the port.  I've been told that the port is
not supported by HP, so there's no documentation available.  I realize that
this is the price you pay for writing to specific hardware, but speed was
the prime consideration, and it is much faster than using BIOS.
If anyone can help in any way, I will be eternally grateful.
Marty Fried
SlideTek, Inc
Sausalito, Calif.