Happy Birthday VAX 11/780

Chuck Guzis cclist at sydex.com
Mon Oct 25 18:56:39 CDT 2010


On 25 Oct 2010 at 18:56, William Donzelli wrote:

> > The engineers did not believe the Motorola design was practical and
> > we worried about a large 64 pin chip in the environment of a
> > military helicopter's avionics bay (G forces, vibration, expansion,
> > cooling etc) and it was decided to go with the 48pin Zilog Z8001
> > instead.
> 
> Why not use PGA or Flatpack?

The biggest problem at the time was supply and availability.  We got 
dog-and-pony shows from Intel, National, Zilog and Motorola.  We 
really liked Motorola, but, like National, delivery of actual silicon 
(as well as production quantities) was "Real Soon Now".  In fact, as 
it I recall, it took National almost 3 years after their initial 
presentation before they had production silicon ready for sale.  The 
big reason that the x86 got its popularity was because Intel was 
substantially ahead of the crowd in availability.

Wasn't TI making some inroads with its I2L SPB9900 chips?  I never 
could get a sample from the TI sales rep.

How long did the Fairchild 9440 persist in military gear?

--Chuck





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