Path: utzoo!utgpu!attcan!uunet!husc6!mailrus!caen.engin.umich.edu!sol.engin.umich.edu!mystone
From: mystone@sol.engin.umich.edu (Dean Yu)
Newsgroups: comp.sys.mac.programmer
Subject: My 256K ROMs aren't smart enough, or Are Apple ROM programmers sloughing off?
Message-ID: <3f84800b.59b7@sauron.engin.umich.edu>
Date: 7 Nov 88 06:08:00 GMT
Sender: netnews@caen.engin.umich.edu
Reply-To: mystone@sol.engin.umich.edu (Dean Yu)
Organization: University of Michigan, Ann Arbor
Lines: 37


   OK, will somebody at Apple please tell me that the people who programmed
the Mac II ROMs were really doing their jobs instead of playing NetTrek?  Two
of us have been working on a color version of ShowINIT that will display a
color icon if the machine it is running on has Color QuickDraw, and plot the old
black and white icon if CQD isn't available.
   No, big deal, right?  Well, we call GetCIcon, assuming that it will set
the pointers to all the PixMaps and BitMaps correctly as is stated in IM V.
We rant and rave for a few hours thinking that our knowledge of 68000 was a
little lax, and we had the wrong addressing modes, etc.  Then we wisened up
and decided to use the debugger, and take a look at what's going up.  Guess
what we found?  The baseAddr fields in all the maps were NIL!  Specifically,
 CIcon.iconPMap.baseAddr, CIcon.iconMask.baseAddr, and CIcon.iconBMap.baseAddr
were all set to nil.  Now I quote from IM V, on GetCIcon:

  "The GetCIcon function allocates a CIcon data structure and initializes it
using the information in the resource of type 'cicn' with the specified ID."

  So.  What's the story?  If it sounds like I'm ticked, I am.  I'm getting
tired of trying to write neat programs, and finding out that there are
problems with the ROMs.  How are we supposed to expect to write decent
programs if the tools which make the Mac the Mac don't work like they're
supposed to?
  True, we can figure out where all the maps are stored by hand (we think),
but why should this be done when Apple should have done it for us?

______________________________________________________________________________
Dean Yu                            |  E-mail:    mystone@caen.engin.umich.edu
University of Michigan             |  Real-mail: Dean Yu
Computer Aided Engineering Network |             2413 Kelsey House
===================================|             600 E Madison
"These are MY opinions." (My       |             Ann Arbor, MI 48109
 employer doesn't want them.       |==========================================
 Actually, they don't really care  |
 what I think.  But President      |   This space intentionally left blank.
 Duderstadt does...)               |
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