> On Jan 17, 2017, at 12:13 PM, william degnan <billdeg...@gmail.com> wrote:
>
> On Tue, Jan 17, 2017 at 12:09 PM, Chuck Guzis <ccl...@sydex.com> wrote:
>
>> I find it curious that what seems to be collected in the minicomputer
>> area seems to be gear of major brands.
>>
>> Does anyone collect Varian minis?...
>>
>>
> I think it's simply an availability thing ...I have manuals for a lot of
> the non DEC minis, have to settle for simH, where am I going to get a
> Varian?
Yes, they are bound to be harder to find. But with decent manuals you can add
them to SIMH. It's not that hard. Then it becomes a matter of finding
software.
Things seem to be worse yet with non-US computers. You see very little mention
of those, and (apart from BESM) nothing in SIMH. UK computers get mentioned
once in a while, other parts of Europe even less. As a former Dutchman, I've
wanted to find Philips computer documentation -- it seems to be non-existent.
The first machine I did significant work on was a Philips PR8000; the grand
total coverage of that machine on the WWW appears to be a one line entry in a
book listing computers manufactured in the 1970s. Similarly, I know Siemens
made minicomputers, because I used a precision plotter driven by one of those
-- a machine used around that time to draw postage stamp and paper money
designs for the Dutch government. Haven't seen that one either.
It may be that some of those computers aren't all that interesting, in the
sense of not offering any unusual capabilities or architecture wrinkles. But
that's certainly not true for all of them; the PR8000, for example, has an
approach to interrupts that's quite efficient and one I haven't seen since.
paul
