Hazeltine 1200

Sridhar Ayengar ploopster at gmail.com
Thu Dec 6 09:09:00 CST 2007


Allison wrote:
>>> My father just rescued a Hazeltine 1200 from a
>>> scrapheap for me.  I know 
>>> nothing about these.  Could someone give me some
>>> pointers to 
>>> information?  Thanks.
>>>
>> Nice! I don't know anything about the 1200, but I have
>> a 1500 and a 1421. They are both just simple
>> terminals, with some fairly basic control functions
>> What does it look like? Is the keyboard integral or
>> detatched? Does it look like the 1500/1400 series? -
> 
> The 14xx and 15xx are late 70s (after 1976) as 1500 used
> 8080 and the 1400 used 8048 cpus.

Interesting.  8048 is an integrated microcontroller, no?

>> http://vt100.net/manx/covers/14/hi-1056a.png. 
>>
>> Now, if it looks like the 2000, you've got a great
>> score. Those are some interesting beasts. I've never
>> seen one, but they look like this.
>> http://www.columbia.edu/acis/history/h2000s.gif
>>
>> The Hazeltine 2000 was a very early video terminal
>> (circa 1972).
> 
> The 1200 was a basically glass tty, all uppercase
> (may have had a back pannel option for all upper
> tty mode or mixed) it was capable of slow baud rates 
> (I think to 1200 or 4800) and both RS232 or current 
> loop. I used on on the DEC PDP10 so that means it 
> was in house there by spring 1972.  It was all logic
> no cpu used and I belive it used serial PMOS shift
> registers for storage.

Wow.  Neato!

Peace...  Sridhar



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