Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!tank!eecae!netnews.upenn.edu!eniac.seas.upenn.edu!bell
From: bell@eniac.seas.upenn.edu (Mike Bell)
Newsgroups: comp.sys.mac.programmer
Subject: CurrentA5 and DDP listeners
Message-ID: <12515@netnews.upenn.edu>
Date: 29 Jun 89 10:39:41 GMT
Sender: news@netnews.upenn.edu
Reply-To: bell@eniac.seas.upenn.edu (Mike Bell)
Organization: University of Pennsylvania
Lines: 27

This is from Barry Twycross at Du Pont Pixel systems in England really

I was writting a DDP socket listener running under multifinder, and I
assumed that the interupt handler would take care to make sure that your
CurrentA5 would be set up correctly, but it dosn't. I seem to get other
programs A5 value occasionally (this is good for crashing lightspeed C
or the debugger out from underneath of you as I was writing into thier
global space.)

The fix I use is to store my CurrentA5 processor relative in the code,
but this is really against my principles.






********************************************************************************
     
Mike Bell                                     CSnet: BELLMA%ERVX01@dupont.com
Senior Engineer                               Applelink: D2747
DuPont Electronic Imaging
Core Technology Group

            Can YOUR mac play FOOTBALL ????

********************************************************************************