MEM11 update

Pete Lancashire pete at
Sun May 1 19:42:14 CDT 2016

Do you or someone have a list of all the Unibus bus chips ? I'd like
to put them in my search list


On Mon, Feb 8, 2016 at 2:10 PM, Guy Sotomayor <ggs at> wrote:
>> On Feb 8, 2016, at 2:04 PM, Noel Chiappa <jnc at> wrote:
>>> From: Ethan Dicks
>>> I'm starting to get sorry I sold off my surplus NS8641s from Software
>>> Results 20 years ago. To be fair, I did get over $4 each for them, so at the
>>> time, it was a good deal for me (ISTR retail was $7.50 even then, so I
>>> got a good spread on the price).
>>> I do have some left, but handfuls, not armloads.
>> NS8641's are still available. I got a bunch from a guy in Hong Kong for
>> US$1.50 each - considering the source, I built a test card to make sure they
>> met specs, and they do, so I'm pretty sure they aren't counterfeits. :-)
>> When I was worried he couldn't find enough, I checked with a supplier (4 Star
>> Electronics, I think) and they had like 50K available, and quoted me a price
>> in about the same region, so I don't think UNIBUS transceivers actually are a
>> problem, at least, not at the moment.
> That’s good to know although I use a number of different UNIBUS interface
> parts depending upon the signal (input only, output only or bi-directional).
> But NS8641’s are the most numerous.
> TTFN - Guy

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