> DEC PDP-10; the registers were also addressable as the first 16
> memory locations.  You could even put code in the registers and
> jump to them, for a speed boost.

OK, I did not know that one, but I think it is a bit of a borderline 
case: the registers are stored in memory, so as a consequence they can 
be addressed indirectly  (much like the 990/9900).

-- 

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist