Jerome H. Fine
jhfinedp3k at compsys.to
Thu Feb 18 19:21:11 CST 2010
>Tony Duell wrote:
>>On Feb 17, 2010, at 1:27 PM, Tony Duell wrote:
>>>>I've never seen, nor heard of anything but white phosphor VT100s.
>>>Many years ago I saw a VT100 with what was cal;ed a 'retrographics
>>>fitted. This was a third-party add-on that connected to various
>>>connectors on the normal VT100 logic board and which gave (for the
>>>high resolution graphics. (No, I don't mean a VT105 board, this thing
>>>allowed to you to set or clear each pixel).
>>>Anyway, I seem to rememeb this unit had a green phosphor CRT in it. It
>>>was almost caetainly not DEC-original, it was probably changed when
>>>retrographics boar dwas fitted.
>> That was called, I think, a "VT640" or something similar. It
>>wasn't a DEC product. I had one a very long time ago (late 1980s I
>>think) and it was dead. I don't know where it ended up.
>It was partly a DEC product :-). The chassis,case, keyboard PSU, bideo
>board and logic board were all stock DEC parts. There was a paddleboard
>(non-DEC) in that bridging edge connector that intercepts the lines to
>the RS232 conenctor. And another board full of chips (including IIRC a
>Z80) to do the graphics.
>I assumed from the name that this board could be retro-fitted into a
Somewhere over the decades, I acquired what looks like a VT100 on the
A company by the name of ID Systems Corporation seems to have almost
replaced the internal hardware and ended up with a color monitor as
Unfortunately, there is no date.
At one point, I attempted to see if it was working, but without any
only indication of color was during the SETUP modes.
The monitor seems to be about twice as heavy as a normal VT100, probably
due to a replaced power supply. I don't have the time at the moment to
Does anyone have any additional information? Are there any manuals
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