Teleprint 390

[Jim Beacon]

----- Original Message -----
From: "Dwight K. Elvey" <dwight.elvey at amd.com>
To: <cctalk at classiccmp.org>
Sent: Wednesday, July 13, 2005 12:04 AM
Subject: Re: Teleprint 390


> >From: "Stefan" <birs23 at zeelandnet.nl>
> >
> >I just hooked up my Teleprint 390 to my laptop and it works like a
> >charm, almost 100%. I can type on my laptop and the output appears on
> >both the papertape as typed. And what I type on the Teleprint appears
> >on my laptop but what it doesn't do is when I feed it a papertape
> >output it on the laptop (only parts). It does output it correctly on
> >the Teleprint itself. Any idea's what might be wrong here ?
> >I am not a real technical person but willing to give anything a try :-)
> >
> >Stefan.
> >
>
> Hi
>  Some computers are especially slow at doing a linefeed to
> the screen. I'd think it could keep up with 110 Baud though.
> Most teletypes have some way for a signal from the computer
> to throttle the paper tape read ( as I recall ). You might
> look at connecting some handshake.
>  You didn't state if it was making mistakes from the first
> character or if it read several right and then lost it.
> If it read some right, how long does it go before it
> makes mistakes? Any line feeds involved?
> Dwight
>
>

My 11/45 has a seperate "Paper Tape Advance" output on the console serial
interface, whic is set by writing to a register - I assume that the
Teleprint 390 / ASR33 has either a solenoid drive or a clutch that allows
the tape to advance one character at a time, under processor control.

Jim.