On Mon, 25 Jan 2021 at 09:39, Clem Cole <clemc@ccc.com> wrote:

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>
> On Sun, Jan 24, 2021 at 7:21 PM Jon Steinhart <jon@fourwinds.com> wrote:
>
>> I think that X1 was W.  But I was doing other stuff at the time and don't
>> know for sure.
>>
> Gettys or Keith might know = but I think that is close.  My memory was X1
> was a port of W to the Vaxstation under Ultrix.  Like you I was not paying
> a lot of attention.
>

The reference port for X10 was certainly a VAXstation (I/II/GPX).  I've
compiled and run X10 and X11R1 on SIMH's microVAX II emulation running
Ultrix 2.3; my recollection is that it all works right out of the box.
Wikipedia says "DEC, then preparing to release its first Ultrix
<https://en.wikipedia.org/wiki/Ultrix> workstation, judged X the only
windowing system likely to become available in time. DEC engineers ported
X6 to DEC's QVSS display on MicroVAX
<https://en.wikipedia.org/wiki/MicroVAX>." To me that's unclear if there
already was an Ultrix / uVAX port of some other nature or if that was the
first iteration.

https://www.talisman.org/x-debut.shtml states that the original X was for
the VAXstation 100.  I have no idea what OS it would have been running; a
release date of 1983 for the VS100 would predate Ultrix 1.0.

-Henry

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