[Info-vax] OT: IA-128 ???

[Bob Koehler]

In article <hb7rfh$6qt$2 at naig.caltech.edu>, glen herrmannsfeldt <gah at ugcs.caltech.edu> writes:
> 
> That is why IBM used base-displacement addressing for S/360.
> It allows for relatively small instructions and still a large
> addressing space.  At the beginning, many S/360 models had
> 8K or 16K of core, though a 24 bit addressing space.  
> 
> VAX (closer to on topic) allows one to choose the size of
> the displacement in its addressing mode as appropriate.

   Alpha uses base-displacement, very similar to 360.