Designing CPU

Frank Buss wrote:
> referringto@googlemail.com wrote:
> 
> > Maybe this is of interest, it recently found a new home:
> >
> > http://www.opencores.org/projects.cgi/web/mcpu/overview
> 
> Nice small instruction set, but maybe too limitd, because even implementing
> a shift operation (e.g. for implementing multiplication) would need
> multiple instructions. And 64 bytes of data/code memory doesn't look very
> useful.


A shift left is nothing but an add. Just updated the documentation for the 
SPARTAN3E port of MPROZ with external RAM/ROM (in German):

ftp://137.193.64.130/pub/mproz/mproz2a.pdf

The version with internal RAM (in English):

ftp://137.193.64.130/pub/mproz/mproz3_e.pdf