[...]
> >I am doing a 20 bit CPU with about 125 chips total
> >in the computer and front panel. About 50?
> >more chips for memory and serial i/o.
> >
> >http://www.jetnet.ab.ca/users/bfranchuk/ldp/ldp1.html
> >Ben.
> >
>
> Hi
> All make the assumption that you must make 8 bit/16bit
> or, in your case, 20 bit. One can make a 1 bit alu that
> can have data width controlled by instruction. It may
This may not reduce the IC count that much!. I've recently been looking
at the HP9810-series calculators, and the processor in there is a bit
serial unit. There are 4 cards of around 20 chips each for the processor
(control, data path, clock, I/O interface) and another 2 or 3 cards,
again 20 chips each, for the mrmory interface. Which is easily comparable
to a full-parallel 16 bit processor.
-tony
Received on Sat May 24 2003 - 16:49:01 BST