Questions tagged [vax]

For questions about DEC's VAX 32-bit minicomputers.

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9 votes
2 answers
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What did Richard Stallman have against VMS?

Richard Stallman of course was an advocate of free software, and VMS was proprietary, so he would've disapproved of it on that basis alone. (To be clear, I am not discussing here whether he was right ...
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4 votes
2 answers
273 views

What random number generator was used in the VAX game Empire?

Around the year 1990, I played the game Empire on a VAX/VMS system. It was a turn-based, text-based-map wargame that later inspired Civilization and Xconq. What was particularly memorable about this ...
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3 votes
1 answer
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Porting of software from the m68k family architecture to the DEC VAX

I am looking for impressions, memoirs, articles, guidelines - everything that is possible about the unusual direction of software migration. I am interested in non-Unix related code, and preferably ...
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6 votes
2 answers
432 views

VAX 11/780 16MB memory board - what was the physical size?

I'm trying to get a feel for what it looked like when you designed a computer to have a lot of memory chips stuffed into it. To that end, I found this: https://commons.wikimedia.org/wiki/File:...
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3 votes
1 answer
227 views

DEC "CI" bus, better known as?

Looking over a list of various VAX processors, I noticed a reference to a "CI" bus. Poking about in Google I can only find very passing mentions of this, and no details. I suspect this had ...
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9 votes
4 answers
501 views

Were the VAX eXtended Function Control (XFC) instructions ever used commercially?

The DEC VAX has a set of 256 instructions set aside for user addition via microcode edits. Were extension sets ever commercially produced and sold, or was this functionality mostly used in-house? ...
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