Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ulowell!m2c!applix!scott
From: scott@applix.UUCP (Scott Evernden)
Newsgroups: comp.sys.amiga
Subject: Re: Problem with -b vs -b0 option on Lattice
Keywords: Lattice V4.01 V5.00 GURU
Message-ID: <886@applix.UUCP>
Date: 19 Dec 88 19:40:25 GMT
References: <29526@tut.cis.ohio-state.edu> <882@applix.UUCP> <96@microsoft.UUCP>
Reply-To: scott@applix.UUCP (Scott Evernden)
Distribution: na
Organization: APPLiX Inc., Westboro MA
Lines: 29

In article <96@microsoft.UUCP> w-colinp@microsoft.UUCP (Colin Plumb) writes:
>In article <882@applix.UUCP> scott@applix.UUCP (Scott Evernden) writes:
>|>
>|>EBase = (struct ExecBase **) (4L);
>|>ExecBase = *Ebase;
>|        vs.
>|>       LEA     $4, A0
>|>       MOVE    (A0), A6
>|Try:
>|        struct ExecBase *ExecBase = (struct ExecBase *) 4;
>
>Wrong!  The *contents* of location 4 are a pointer to ExecBase, but
>"4", the number, is a pointer to a pointer to ExecBase.  The original
>code is right.  Yours says the ExecBase structure starts at address 4,
>which is not correct.

Of course you are correct.

I think I meant something more like:

	struct ExecBase *ExecBase = * (struct ExecBase **) 4;

but couldn't manage to spit it out on a Friday night.  This is exactly
equivalent to what Ethan had originally, so...


never mind...

-scott