On Tue, Sep 5, 2017 at 11:23 AM, Paul Winalski <paul.winalski@gmail.com> wrote:

On 9/4/17, Pete Turnbull <pete@dunnington.plus.com> wrote:
>
> I don't doubt it's possible, just not on an ASR33. Apart from the
> timing issue, the carriage return mechanism on Teletype 33s inhibits
> printing while the carriage is moving back, until it stops at the left
> margin.

I could swear I saw our old ASR33 at college do this (print characters
in the middle of the line while the carriage is moving back). But
maybe my memory is faulty and it was another printing terminal of that
era. Or maybe our ASR33 was broken.

I agree with Paul, maybe later models worked this way, but the first ASR33 I used definitely did print at strange times. I have the same memories from 1967 on a GE Mark III with Dartmouth Basic using an acoustic coupler, where line noise was definitely a problem. It would print random characters, particularly during carriage motion. Since the only way to get a copy of your program was with the LIST command, it was rare to get a clean copy. If the program was of any length, there was usually a random character or two overprinted in the middle of listing.

Clem