Re: New ][ Hardware - DSP board (soon!)

[jamesb@ecst.csuchico.edu (James L. Brookes)]

In article <C2zDC7.BHG@javelin.sim.es.com> kpopple@imp.sim.es.com
(Ken Poppleton) writes:

>Processor: Motorola DSP56001
>
>Clock speed: 20Mhz  (10 MIPS)  possibly a 33 Mhz version? (16Mips)

I believe the 56ks the NeXT used were prototypes, clocked at 20.48 or so
Mhz.  The production version of the 56001 is 33mhz, so I'd hope that's
what you would use...

>Memory: Total of 9K words (24 bit) divided into:
>	dsp56001 internal memory 512 words program (P),
>				 256 words X data
>				 256 words Y data
>	external 8k words usable as 8k in P,
>				    or 4k in each of X or Y
>	external 8kx8 Eprom or EEprom in P, X, or Y memory
[possible future things]
>	Design an expansion memory board.

Wouldn't it be better to have sockets for SIMMs right on the board?  I
can think of a lot of applications where going through 1mhz to get to
the memory would bog the DSP down tremendously.  Having 1 SIMM socket
capable of 256, 1, or 4mb on board would be a very cool option, IMHO.

>Ken Poppleton 
-- 
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|          James Brookes            | Inet: bb252@cleveland.freenet.edu |
|``What, me worry?'' - A. E. Neuman |   jamesb@cscihp.ecst.csuchico.edu |
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