Path: utzoo!yunexus!torsqnt!dptcdc!jarvis.csri.toronto.edu!mailrus!iuvax!rutgers!apple!Apple.COM!lsr
From: lsr@Apple.COM (Larry Rosenstein)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Problems with XCMDs in MPW Object Pascal 3.0
Message-ID: <877@internal.Apple.COM>
Date: 8 Mar 89 18:31:11 GMT
Article-I.D.: internal.877
Sender: usenet@Apple.COM
Organization: Apple Computer, Inc.
Lines: 21
References:<4321@sdcc3.ucsd.EDU> <26942@apple.Apple.COM>

In article <26942@apple.Apple.COM> keith@Apple.COM (Keith Rollin) writes:
> instance, I wasn't aware that the -rt option caused the A5 relative 
addressing
> to become PC relative. But I still don't think that it will also change 
the

I don't think it does.  The linker routinely changes A5-relative 
addressing to PC relative addressing if the instruction and the effective 
address end up in the same segment (and if the reference doesn't require 
A5-relative addressing).  

I don't think -rt affects this, except that when you use this option you 
generally are making one segment, so everything is changed to PC-relative 
addressing.  In MPW Pascal, one can turn on a compiler flag to require 
A5-relative addressing; if you did this and tried to link with -rt, you 
would get a linker error.

Larry Rosenstein, Apple Computer, Inc.

Internet: lsr@Apple.com   UUCP: {nsc, sun}!apple!lsr
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