Article View: comp.sys.amiga.tech
Article #11541Re: Longword alignment with 68020
From: Dave Haynie
Date: Tue, 21 Feb 1989 18:28
Date: Tue, 21 Feb 1989 18:28
22 lines
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1335 bytes
in article <712@cord.UUCP>, nsw@cord.UUCP (Neil Weinstock) says:
> Quickie question:
> Do the 68020/32-bit memory boards (ala A2620) require that longword data
> be longword-aligned? I suspect that they do, but I want to be sure.
No, actually, the 68020 is less demanding about word alignment than the
68000. It wants instructions word aligned, but data doesn't have to be
aligned at all. However, if a longword datum isn't longword aligned, the
'020 will take two cycles to get at it, which will of course make fetching
that thing 1/2 as fast as it could be.
> / Neil Weinstock | att!cord!nsw | "One man's garbage is another \
> \ AT&T Bell Labs | nsw@cord.att.com | man's prune danish." - Harv Laser /
--
Dave Haynie "The 32 Bit Guy" Commodore-Amiga "The Crew That Never Rests"
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!husc6!rutgers!cbmvax!daveh From: daveh@cbmvax.UUCP (Dave Haynie) Newsgroups: comp.sys.amiga.tech Subject: Re: Longword alignment with 68020 Message-ID: <6031@cbmvax.UUCP> Date: 21 Feb 89 18:28:36 GMT References: <712@cord.UUCP> Distribution: na Organization: Commodore Technology, West Chester, PA Lines: 22