Article View: comp.sys.amiga.tech
Article #7268Re: Assembler Programming - Costs versus Benefits
From: Jean-Noel MOYNE
Date: Thu, 06 Dec 1990 19:11
Date: Thu, 06 Dec 1990 19:11
23 lines
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1645 bytes
In article <EACHUS.90Dec5182932@aries.linus.mitre.org>
eachus@linus.mitre.org (Robert I. Eachus) writes:
> And the difference which kills AmigaBASIC: The 68000 ignores the
> upper 8 bits of addresses, but they are valid on the 68020/68030.
> Using the upper bits of a pointer as flag bits is a VERY bad thing,
> but some people never learn. It would have been nice if the 68000
> checked these bits and trapped, but it doesn't.
Sure, guess where AmigaBasic comes from .... From a machine where
every body uses theses bits as flags ... and from a machine who has now to
ask you "the application is not 32 bits clean, do you want to launch it
anyway ?" (this requester is here for 99% of the progs) when you try to
use something under A/UX. (-:
How do you believe we had AmigaBasic that fast on the Amiga ? They
didn't write it from scratch.
JNM
--
These are my own ideas (not LBL's)
" Just make it!", BO in 'BO knows Unix'
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<1990Nov25.040121.10773@zorch.SF-Bay.ORG> <1990Nov30.144853.2562@diku.dk> <7173@sugar.hackercorp.com> <EACHUS.90Dec5182932@aries.linus.mitre.org>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!caen!hellgate.utah.edu!dog.ee.lbl.gov!lbl.gov!jnmoyne From: jnmoyne@lbl.gov (Jean-Noel MOYNE) Newsgroups: comp.sys.amiga.tech Subject: Re: Assembler Programming - Costs versus Benefits Message-ID: <8427@dog.ee.lbl.gov> Date: 6 Dec 90 19:11:16 GMT Sender: usenet@dog.ee.lbl.gov Organization: Lawrence Berkeley Laboratory Lines: 23 X-Local-Date: Thu, 6 Dec 90 11:11:17 PST References: <1990Nov25.040121.10773@zorch.SF-Bay.ORG> <1990Nov30.144853.2562@diku.dk> <7173@sugar.hackercorp.com> <EACHUS.90Dec5182932@aries.linus.mitre.org>