Path: utzoo!attcan!uunet!portal!cup.portal.com!doug-merritt
From: doug-merritt@cup.portal.com
Newsgroups: comp.sys.amiga
Subject: Re: 80286- er, 68000 memory models
Message-ID: <5880@cup.portal.com>
Date: 24 May 88 18:07:26 GMT
References: <2672@louie.udel.EDU>
Organization: The Portal System (TM)
Lines: 27
XPortal-User-Id: 1.1001.4407

David Gay writes a nice clear summary of what's going on with small
and large models, etc. He also says:
> 6) I repeat, all this only affects your C code, and in no way impedes
> access to the ROM.

Possibly some of the confusion stems from the fact that you must pass
long ints to Amiga library routines, whereas in small model, by default
ints are short and so if you forget to cast them, you may well get gurus.

For example:

Print(s)
	char *s;
{
	Write(output, s, (long) strlen(s));
}

Without the 'long' cast, this would guru in small model, because the small
model C library strlen() returns a short, not a long.

Hence casting 'int' arguments to library functions to 'long' is a more
portable style regardless of which compiler or model you yourself work in.
	Doug
--
      Doug Merritt        ucbvax!sun.com!cup.portal.com!doug-merritt
                      or  ucbvax!eris!doug (doug@eris.berkeley.edu)
                      or  ucbvax!unisoft!certes!doug