[vcf-midatlantic] Museum 3B1 & PDP-8

Dave McGuire mcguire at neurotica.com
Fri Nov 1 00:34:23 EDT 2019

On 10/31/19 10:41 PM, David Gesswein via vcf-midatlantic wrote:
>>> The machine wasn't powerfull enough to run X.
>>   Of course it was, it was just never ported.  Sun-2 systems run X just
>> fine, with the same CPU at the same clock rate.
> My first X was X11R5 on Sparc and PA-RISC processors so later and coloring
> my opinion of what was possible. How much memory was needed to usefully run 
> X11 on a Sun-2? 

  I ran it in 2MB on my 2/170.  It swapped itself senseless, but it ran
and I could get work done.  It was much better (both I and my disks were
a lot happier) when I added a 4MB board.

  I ran X10R4 on a VAX, and jumped to X11R3 on the Sun-2.  When X11R4
came out, I built that, and it was so much faster I was actually
startled by it when I first started it up.  The R3-R4 difference was
amazing.  I will never forget that day.

  As an interesting benchmark, it took about the same time to compile
X11R4 on a Sun-2/170 with 6MB and a MicroVAX-II with 9MB, both with fast
disks.  They were both within a few minutes of twelve hours.


Dave McGuire, AK4HZ
New Kensington, PA

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