16 Aug
2016
16 Aug
'16
6:59 p.m.
Neat. ?Any thoughts as to model year? ?Are these ASCII?
Sent from my Samsung device
-------- Original message --------
From: Al Kossow <aek at bitsavers.org>
Date: 2016-08-16 5:42 PM (GMT-08:00)
To: cctalk at classiccmp.org
Subject: Re: can anyone identify this terminal keyboard and pcb?
On 8/15/16 9:52 AM, Brad H wrote:
I've tried nailing down what terminal it came from
looking at hundreds of pictures but no dice.
More research today. I'm pretty sure it was a Telex message preparation terminal. They
did have a 202
datacomm service.
Still no clue who might have made it.
He did have more than one keyboard, so I did buy one. After staring at the code in the
eproms there
is a setup mode (probably shift/A) which looks like it lets you set a clock.
Another clue is the cent symbol above the 6
17 Aug
17 Aug
7:49 a.m.
On 8/16/16 6:59 PM, Brad H wrote:
Neat. Any thoughts as to model year? Are these ASCII?
Date code range I see on the chips is 1977-79.
I dumped and decoded the font rom. The code is similar
but not quite ASCII. Alphanumerics seem to be in the
right place. I'll try powering it up once I get a bit
more of it traced out. There is a 256x8 prom right by
the keyboard socket, so I'm guessing there is some
code conversion going on with the keyboard. Getting it
to talk to something would require tracing the modem card
input back to the 8251 uart. There is a 'print' option on
they keyboard above the 'P' so the 25 pin connector is
probably for a printer. They appear to have FIFOs on the COM2017
UART.
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