Workings of a TTY

From: James Willing <jimw_at_agora.rdrop.com>
Date: Mon Dec 1 01:07:04 1997

At 10:08 PM 11/30/97 +0000, you wrote:
>I have a query about the operation of a KSR 33 TTY when reading paper
>tape : does the TTY blindly send the characters read from the tape at 10
>cps or is the tape advance and read triggered by a signal from whatever
>th TTY is connected to.

Minor niggle... a 'KSR' unit is Keyboard Send/Receive. Ergo: no tape
reader/punch.

Now, an 'ASR' unit on the other hand... B^}

The "standard" TTY unit will operate in the "blind send" mode. You start
the reader going and the other end had better be able to handle the data
stream. Only mode of operation I've ever seen one a TTY over a modem.

Some installations where the TTY was local to the computer (same
site/direct connect) added a 'reader control' option where the reader was
controlled by the computer. Fairly common on TTYs used with PDP-8 systems.
 (my 8/I system uses this control)

-jim

---
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The Computer Garage - http://www.rdrop.com/~jimw
Computer Garage Fax - (503) 646-0174
Received on Mon Dec 01 1997 - 01:07:04 GMT

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