Variable Word length CPU

Chuck Guzis cclist at sydex.com
Mon Nov 7 22:10:54 CST 2005


On 11/7/2005 at 10:06 PM William Donzelli wrote:

>...There are no simple
>byte level instructions - everything that goes thru the ALUs are strings,
>basically. Everything is a string. Thw world is a string to an S/3.

Well, yes, there are a couple of byte-level instructions--the immediate
ones (MVI, CLI, SBN, SBF) and the very limited register instructions (you
have to be able to manipulate the index registers somehow!) (L, ST, A, LA).
 But yeah, the instruction set is nothing short of bizarre and it'd be
pretty hard to carry out much useful work using only the index registers!

Cheers,
Chuck





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