The SC/MP is finally alive!
ajp166 at bellatlantic.net
Tue Apr 5 12:47:33 CDT 2005
>Subject: Re: The SC/MP is finally alive!
> From: Wai-Sun Chia <waisun.chia at gmail.com>
>After having looked it up, the literature says that one of the unique
>feature of the SC/MP was/is the ability to share the system bus with
>other peers, therefore was designed for multiprocessing embedded
Yes. I used one of the later 8073 (SC/MP-II in Nmos) running Nibble
Basic and used a second SC/MP-I (oldest pmos part) in an arrangement
so the basic one did IO via the second using a shared bit of ram.
It was impressive then (1980).
>The site further acknowledged that this feature alone makes th SC/MP
>II one of the most advanced design of its time.
it was a little used but unique feature. However, it was also over
rated as it took trivial TTL logic to get the same functionality
when using 8085 or Z80s in multiples.
>So anybody is planning to build a cluster of these babies? :-)
Not likely. As micros go it was slow and if that much cpu was
needed to share/multiprocessor an application people move up to
Z80 or 8088.
>p.s. do you have pics of your SC/MP system? I would love to have a
>look at them...
Yes, slides really. I only just got a digital camera so I have to dig
stuff out and take pics, someday.
[keeper of old compuers, SBCs, S100, DEC PDP-8, PDP-11 and VAX]
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