Date   : Tue, 10 Apr 1990 00:54:53 GMT
From   : pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!texbell!ficc!peter@tut.cis.ohio-state.edu (Peter da Silva)
Subject: Non-Intel Bashing...

In article <GRT23E1ccs@ficc.uu.net> korenek@ficc.uu.net (Gary Korenek) writes:
>     IMHO, a _really_ twisted microprocessor is the RCA 1802.  No "CALL"
> or "RETURN" instructions, for example.  If you want subroutines, you
> have to execute "CALL" code (that you have to include), and for the
> subroutine to return, the subroutine has to execute "RETURN" code
> (that you also must provide!).

Awww, I like the 1802. 16 16-bit registers, any of which could be PC or
SP, but no 16-bit load-and-store instructions. It really could do calls
and returns, but only to coroutines by setting the PC. And it was a really
neat processor for FORTH, because the Forth threaded call was *faster*
than the Standard Call and Return Technique.

This is getting off the subject of CP/M. Followups to comp.misc.

(by the way, this is being posted from my Xerox 820 for the first time.
 I still don't have anything that can speak any protocols... :-<)
-- 
 _--_|\  `-_-' Peter da Silva. +1 713 274 5180. <peter@ficc.uu.net>.
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