Path: utzoo!attcan!uunet!husc6!mailrus!tut.cis.ohio-state.edu!ucbvax!UIAMVS.BITNET!AWCTTYPA
From: AWCTTYPA@UIAMVS.BITNET ("David A. Lyons")
Newsgroups: comp.sys.apple
Subject: GS Finder bugs; dithering
Message-ID: <8903121925.aa07134@SMOKE.BRL.MIL>
Date: 13 Mar 89 00:18:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 54

>Date:         Sat, 11 Mar 89 17:02:42 GMT
>From:         "David C. Whitney" <dcw@ATHENA.MIT.EDU>
>Subject:      Re: Re: GS/OS Compatability issues

>[...] The Finder crash has been attributed to a programming error in
>the FINDER.  The programmer failed to lock down a handle, and
>*sometimes* memory gets shuffled around when launching the next
>program. This seems to happen *only* after running some P8 program.

That was fixed at System Disk 3.2, I believe.  The handle involved
contained the Finder's actual code, and it was getting unlocked when
the Loader put the Finder into zombie state, or something much like
that.  Anyway, it's fixed.

>Note also that GS/OS sometimes doesn't launch P8 stuff very well.
>Z-Link works just fine from under GS/OS (I do it all the time - not
>figuratively but literally). Unfortunately, sometimes it gets
>launched poorly, and parts of it don't load properly. [...]

That isn't very helpful.  If there is _really_ something wrong that
is GS/OS's fault, take the time to figure out exactly what it is so
it can be fixed.

>This one isn't finder-specific...Why are windows restricted on their
>ability to move horizontally? I want to move a window one or two
>pixels to the right, but it always goes in groups of 8 (I think). I
>know it isn't a problem with where the window can be drawn, as a
>window can be placed anywhere when it's created. It just won't move
>in small increments.

See the SetOriginMask call in the Window Manager chapter of the
toolbox reference.  That will clear up most of your questions.

I don't know offhand what value the Finder uses for its windows'
origin masks, but you could find out reasonably easily if you have
Nifty List handy:  while in the Finder, go into NL and use the i
command to find the big Finder code segment, and note the bank
number.  Type "SetOriginMask (with the leading quote) to find the
function number for SetOriginMask, which is $340e.  Typ "*" to drop
into the monitor, and type  \A2 0E 34 22 00 00 E1\<bb/0.ffffp, where
bb is the bank containing the Finder code.  This will show you all
the SetOriginMask calls the Finder makes.  Look at the value pushed
before the window pointer; this value is ANDed into window positions
and window origins.  The most sensible value would be $FFFE, which
keeps everything even so that the dithered colors don't get messed
up.

>Dave Whitney   A junior in Computer Science at MIT
>dcw@athena.mit.edu  ...!bloom-beacon!athena.mit.edu!dcw dcw@goldilocks.mit.edu

 --David A. Lyons              bitnet: awcttypa@uiamvs
   DAL Systems                 CompuServe:  72177,3233
   P.O. Box 287                GEnie mail:    D.LYONS2
   North Liberty, IA 52317     AppleLinkPE: Dave Lyons