My four-yorkshireprogrammers contribution

Gregory Ewing greg.ewing at canterbury.ac.nz
Sat Mar 6 02:19:03 CET 2010


MRAB wrote:

> By the standards of just a few years later, that's not so much a
> microcomputer as a nanocomputer!

Although not quite as nano as another design published
in EA a couple of years earlier, the EDUC-8:

   http://www.sworld.com.au/steven/educ-8/

It had a *maximum* of 256 bytes -- due to the architecture,
there was no way of addressing any more. Also it was
divided into 16-byte pages, with indirect addressing
required to access anything in a different page from
the instruction. Programming for it must have been
rather challenging.

As far as I know, the EDUC-8 is unique in being the
only computer design ever published in a hobby magazine
that *wasn't* based on a microprocessor -- it was all
built out of 9000 and 7400 series TTL logic chips!

-- 
Greg



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