17 Apr
1998
17 Apr
'98
12:20 a.m.
On Fri, 17 Apr 1998, Tony Duell wrote:
Another radio rally bargain...
I'm not sure if this is 10 years old, but anyway...
More than that.
I've got an HP thinkjet printer here, model 2225P.
It's a
battery-operated unit with a parallel interface.
The battery pack has a 2-pin plug on the back, which looks as though it
connects to the standard HP 8V 3W charger. Is that right? I've got those
by the dozen...
Probably so, as they speak of a normal 7.2-7.6vdc range from the battery
pack.
The parallel interface is a DA15-S connector. Does
anyone know the
pinout. I'm pretty sure (from looking inside) that it's TTL level and a
subset of a centronics port.
I wonder if someone may have converted it to HPIB as the non-portable
parallel version uses the normal Centronics connector.
And what do the DIP switches above the parallel
interface do?
See following for switch information.
I've got the user manual for the GPIB version -
are the escape sequences
the same?
Thanks in advance for any help.
-tony
- don
At the site below, Thinkjet docs are listed as "tjxxxxx".
FILENAME: BPD01154
MODE SELECT SWITCH SETTINGS FOR HP THINKJET PRINTERS (C,D,P)
ISSUE: What is the purpose of the mode switches
on the HP ThinkJet models "C", "D", and
"P" ?
SOLUTION: Bank A contains eight mode switches which
allow you to configure the default
conditions for most computer systems and
applications. Bank B (HP ThinkJet model
"D" only) contains five mode switches that
control the RS-232 protocol. These
switches determine parity, word length,
and baud rate. A detailed explanation for
each of the mode select switches are
described below:
BANK A - FOR HP THINKJET "C", "D", AND "P"
# NAME UP DOWN
1 Carriage Return Carriage Return & Carriage
(CR) Line Feed Return Only
2 Line Feed Carriage Return & Line Feed Only
Line Feed
3 Perforation Skip 1 inch Perforation No Perforation
Mode Skip Skip
4 Page Length 12 inches (304.8mm) 11 inches
(279.4mm)
5 Control Sequence Alternate Mode (Epson HP Mode
Mode MX 80 or MX 100)
6 Character Set See Table Below
7 Character Set See Table Below
8 Character Set See Table Below
CHARACTER SET
# 6 # 7 # 8 CHARACTER SET
Down Down Down Roman 8
Up Down Down United States ASCII
Down Up Down Swedish
Up Up Down IBM 8
Down Down Up French
Up Down Up German
Down Up Up United Kingdom
Up Up Up Spanish
*** Following not applicable to "P" ***
BANK B - FOR THINKJET "D" ONLY
# NAME UP DOWN
1 Handshake Mode Data Terminal Ready XON/XOFF
(DTR) (DC1/DC3)
handshaking with
PC
2 Parity & Data See Table B1
Bits
3 Parity & Data See Table B1
Bits
4 Baud Rate See Table B2
5 Baud Rate See Table B2
TABLE B1 (PARITY & DATA BITS)
SWITCH SETTINGS PARITY WORD LENGTH
2 3
Down Down None 8 [or Zero & 7]
Down Up Odd 7
Up Down Even 7
Up Up ONEs 7
TABLE B2 (BAUD RATE)
SWITCH SETTINGS BAUD RATE
4 5
Down Down 9600
Down Up 19200
Up Down 2400
Up Up 1200