[ih] bytes [Re: "network unix"]
John Levine
johnl at iecc.com
Thu Oct 13 10:00:47 PDT 2016
In article <83A454B9-14A9-4078-A103-940C9A48A7EE at sobco.com>,
Scott Bradner <sob at sobco.com> wrote:
>this is the story I remember at the time -almost all of the DG founders were all ex-DEC people
>particularly Ed de Castro who ran the PDP-8 stuff for DEC - the Nova was basically a glorified PDP-8
Having spent a fair amount of time programming a PDP-8, I'd say that
while the Nova had more in common with the 4/5/6/7/8/9* machines than
with the -11, it was not all that much like a PDP-8. The Nova had
four registers, the -8 had a single accumulator, the Nova was
load/store, while the closest things to load and store the PDP-8 had
were TAD (two's complement add) and DCA (deposit and clear the AC.)
Frankly, I think the only important difference between the -11 and the
Nova is that the -11 had byte addressing. The Nova's stripped down
architecture gave it a price advantage in the then-important OEM
market, but that was pretty short term since both were simple enough
to implement in a single package. Other than that it was more
differences of style.
R's,
John
* - the 5/8 were clearly stripped down versions of the 4/7/9
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