Pin-out Serial Cable

Christopher Paradies (paradies@epfl.ch)
Tue, 22 Apr 1997 08:24:23 +0200

Mike,

Does the HP Deskjet have a serial port? To print to a parallel port you
would need a serial to parallel converter. You can connect through another
computer's parallel port using several connectivity software solutions (OGO
to PC Com Port, PC to printer). Check your printer manual for the serial
pin out from the printer, if there is one. It should either be the same as
the PC or the same as the MODEM (e.g. pins 2 & 3 are the key pins to test).

DB-9
DB-25
OMNIGO PC Com Port MODEM
Pin 1 ------- CD ------ Pin 1 ---- CD ----- Pin 8
Pin 2 -----RX/TX---- Pin 3 ---- RX ----- Pin 2 *
Pin 3 ----TX/RX----- Pin 2 ---- TX ----- Pin 3 *
Pin 4 (Unconnected) Pin 6 ---- DSR ---- Pin 6
Pin 6 -------- DTR ------- Pin 4 ---- DTR ---- Pin 20 *
Pin 7 --RTS/CTS-- Pin 8 --- CTS ---- Pin 5 *
Pin 8 --CTS/RTS-- Pin 7 ---- RTS ---- Pin 4
Pin 9 --------- RI --------- Pin 9 ---- RI ------ Pin 22
Pin 5,10 -----GND------ Pin 5 ---- GND --- Pin 7 *

OMNIGO CONNECTOR

-------------------------- keyboard
| 1 2 3 4 5 |
| 6 7 8 9 10 |
-----------------------------

* Required by most modems

--- Mike asked:

I would like to print from my OGO 100 to HP deskjet. Does anyone know the
pin out at both ends?
I found a couple different descriptions on the web. :(
Thanks for the help.
Mike Barnes

Christopher Paradies, Ph.D.
internet: paradies@epfl.ch
address: EPFL, LMPH, DMX-G 333
CH-1015 Lausanne, Switzerland