>>> Bonus history question: What do tha accronyms ASR & KSR mean and
>>> what hardware differed between those variants?

Bill Couture wrote::

>> ASR -- Asynchronous Send Receive [...] a "receive only" teletype,
>> used for such things as newsfeeds.

>> KSR -- Keyboard Send Receive [... with] a keyboard

Wouter wrote:

> AFAIK I had an *A*SR 33 *with* a keyboard. IIRC the A was for automatic.

Alan B Pearse wrote:

> I believe you have KSR correct, but I believe the ASR is "Auto Send
> Receive" because it had a paper tape reader and punch, which could be
> remotely controlled without operator intervention.

BillW wrote:

> I remember "automatic" too;  The ASR had the paper-tape punch/reader.


ASR is indeed Automatic Send Receive because it had a paper tape
reader & punch.

You could also punch a tape locally (keyboard to tape punch) then
minimize your on-line time by quickly sending the pre-punched tape
(tape reader to serial interface).

I believe paper tape is why the ASCII delete character is 0x7F (all
holes punched).  Great fun to make chaff by punching a tape of all
delete chars.  Receiving a delete caused the head to cycle but the
latch magnets did not engage.  Reading a tape of all deletes caused
the ASR-33 to sit there and vibrate but not print anything.

						Lee Jones

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