AM29116DC cpu??

[Tony Duell]

> 
> >>>>> "Tom" == Tom Jennings <tomj at wps.com> writes:
> 
>  Tom> Wow... I missed my opportunity to work on a big 2901-based
>  Tom> realtime video system, I wanted to work on the thing but it was
>  Tom> a big stinky military project, otherwise glad I turned it down.
> 
>  Tom> THe Nova 4's built with a variant though.
> 
> DEC used 2901s in a bunch of places.  The UDA50 is based on them, as
> is the VAX 730.  I suspect there are a number of others...

They also turn up in some PDP11 floating point cards (I think the one for 
the 11/34, for example). 

AFAIK no PDP11 CPU ever used the 2901. 74(S)181s and separate register 
chips were generally used there.

And the RX02 floppy drive has a couple of 2901s and a few 2909 sequencers

I don't recall seeing a 2910 in anyting DEC. I have seen 3rd party 'RX02 
compatible controllers for SA800 drives' that have a pair of 2901s and a 
2910 on them

Classic PERQs didn't use the 2901 at all, but did (alas [1]) use the 2910 
sequencer for the CPU microcode and also for the state machine 
'microcode' for the ethernet and hard disk interfaces.

[1] Alas because the 2910 is strictly a 12 bit sequencer, it can't really 
be extended. Fine for the origianl PERQ 1 (4K control store), but all 
later classic PERQs had a 16K control store. A handful of TTL and a 
couple of PALs wree used to provide the top 2 bits, a circuit which I 
named the '2 bit kludge', pun totally intentional.

As I mentioned a few days back, the PERQ 3a used a pair of 29116s in the 
graphics processor. One to calculator main memory addresses, one to 
modify the gragphics data. 

The Xerox Daybreak seems to have 4 off 2901s in the CPU, with a custom 
Xerox sequncer chip.

And the HP9845 that currently fills my bench has the high-speed language 
processor option. That contains 4 off 2901s and a 2910 sequencer.

-tony