Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!gatech!prism!dali.gatech.edu!mikeg
From: mike@penguin.gatech.edu (Mike Gourlay)
Newsgroups: comp.sys.hp
Subject: Re:  Serial  LaserJet printing!
Keywords: broken failure depressing tired sad
Message-ID: <1990Nov28.092336@dali.gatech.edu>
Date: 28 Nov 90 14:23:36 GMT
Sender: news@prism.gatech.EDU
Reply-To: mike@penguin.gatech.edu (Mike Gourlay)
Organization: Georgia Tech
Lines: 59

In article <770038@hpsadle.HP.COM>, walter@hpsadle.HP.COM (Walter Coole)
writes:
|> I'm not an expert, but I've done what yur trying to do.  Since you
got
|> coherent stuff from the first page, it's unlikely that you have the
|> pinout wrong.

The pinpout could still be wrong.  If the printer's TD is not connected
to the computer's RD then the computer could send stuff to the printer,
 but when the printer sends the ^S, the computer ignores it, and keep
 sending data anyway.  That's what seems to be happening.

|>  Did you want CS/CB (hardware) handshaking or ^S/^Q
|> (software) handshaking? 

I was going to use ^S/^Q but if this continues, I'll use CS/CB.

|> The LJ will do both.  If you want CS/CB, you
|> will need those pins connected,

Please tell me what those pins are.  I can't get ^S/^Q to work.

|> but unless you need it (because for
|> instance you have a switch box to share the printer with another
|> device), ^S^Q only requires the three wires to be connected.  I use
a
|> 98561-61604 cable with another cable after it that connects 2-3,
3-2,
|> 7-7, and 20-6 (the bare essentials from a 13242G cable).

Is that 20 on the printer side to 6 on the computer/98561-61604 side, or
the other way
around?  I have a 98561-61604 cable.  I tried both configurations.  I
figured that the 6
on the computer side should go to 20 on the printer side, but neither
way worked.  Please
tell me anyway, so I know for sure what should be working.  What is a
13242G cable?

|>  For CS/CB
|> handshaking, you need to set the minor device number correctly.

What is the minor device number, please?  What else needs to be done? 
What do I tell the printer?  Do I make DTR polarity HI or LO?  How
about XON/XOFF on the printer  when I want to use CS/CB?   Since
^S/^Q doesn't work for me, I'll try CS/CB.

|>  You
|> may need to check your device model, since some of them fiddle with
|> device settings.  In particular, be sure that the receive baud rate
is
|> the same as your printer is set to.

What should I look for other than baud?  Since I got data to the printer
it seems that everything is probably okay in that respect.

	Thanks for your reply,
	Mike Gourlay,
	mike@penguin.gatech.edu