Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!unido!horga!veeble!fiction!Daniel_Roedding
From: Daniel_Roedding@fiction.ms.sub.org
Newsgroups: comp.sys.atari.st
Subject: Aaaarrghh, DESKTOP!!!!
Message-ID: <208348@fiction>
Date: 15 Feb 91 18:46:46 GMT
Lines: 23
X-Attributes: type 2, from 100, acclv 0, expires

Some strange things about the <Esc> function in the DeskTop...

Just try an assembly from 0xFE75E0 (TOS 1.04), you'll see a *really*
dirty hack!!

When you press <Esc> on the DeskTop, the following happens:


1) hdv_bpb and hdv_rw are patched
2) hdv_mediach is changed to a routine that always returns "2"
3) The DeskTop opens a file "Drv:\\X"
4) This call *must* use the Getbpb()-function, otherwise the redraw
   routine is teminated!
5) The vectors are restored and the new directory is shown


So when you write your own device drivers on GEMDOS level, you *must*
use Getbpb at a file request on "Drv:\\X". It took us almost a week to
find out about this...

IS THIS REALLY NECESSARY????

Daniel