Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!pasteur!ames!apple!dlyons
From: dlyons@Apple.COM (David Lyons)
Newsgroups: comp.sys.apple
Subject: Re: Computer languages on the various Apple Corp computers
Message-ID: <31465@apple.Apple.COM>
Date: 23 May 89 23:48:37 GMT
References: <2821@puff.cs.wisc.edu> <10206@claris.com>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 30

In article <10206@claris.com> jazzman@claris.com (Sydney R. Polk) writes:
>[...] However, the stack is small
>(64K) and can only be put in special memory (bank 0) which is taken up
>by tool memory and firmware. [...]

You've got 46K in bank 0, minus whatever you need to give to the toolbox, and
minus about 10K for GS/OS, leaving you at least 30K for a stack if you really
want it.

>- The chip is missing some addressing modes which make doing somethings
>very difficult.  For instance, the only addressing mode on jsl is 
>long.  This means you have to write self-modifying code to do a long
>jump table.

You can look up an address-minus-one in a table, push it on the stack, and
then RTS or RTL to it.  Works slick.

>Syd Polk           | Wherever you go, there you are.
>jazzman@claris.com | Let the music be your light.
>GO 'STROS!         | These opinions are mine.  Any resemblence to other
>GO RICE!           |  opinions, real or fictitious, is purely coincidence.

 --Dave Lyons, Apple Computer, Inc.          |   DAL Systems
   AppleLink--Apple Edition: DAVE.LYONS      |   P.O. Box 875
   AppleLink--Personal Edition: Dave Lyons   |   Cupertino, CA 95015-0875
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   My opinions are my own, not Apple's.