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From: mogul%Shasta%su-score@sri-unix.UUCP
Newsgroups: net.unix-wizards
Subject: Re: INGRES for 68Ks (Pixel 100)
Message-ID: <4542@sri-arpa.UUCP>
Date: Thu, 25-Aug-83 14:49:00 EDT
Article-I.D.: sri-arpa.4542
Posted: Thu Aug 25 14:49:00 1983
Date-Received: Mon, 29-Aug-83 02:20:36 EDT
Lines: 17

From:  Jeff Mogul <mogul%Shasta@su-score>

I've ported many a program between Vaxen and 68000s.  There are things
that people usually ignore when writing code that screw up such ports:
	(1) Vaxen/PDP11s use a different byte-ordering from 68ks.  This
shows up almost every time strong typing is violated, especially
with casts and unions.
	(2) If you pass the address of a long or a short to a routine that
expects the address of a short or a byte, resp., the "right" thing MIGHT
happen on VAX/PDP-11, but probably not on a 68k.
	(3) Similarly, depending on your compiler you might have to
be more careful about getting the return-type declaration right for functions.
	(4) Code which deals with external representations, such as disk
files or network packets, has to face the byte-order problem square in the
face.

-Jeff