Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!zaphod.mps.ohio-state.edu!rpi!uupsi!sunic!kth.se!cyklop.nada.kth.se!news
From: d88-jwa@dront.nada.kth.se (Jon W{tte)
Newsgroups: comp.sys.mac.programmer
Subject: Re: How do I write a screen saver?
Message-ID: <1991Jan12.111327.28896@nada.kth.se>
Date: 12 Jan 91 11:13:27 GMT
References: <13650002@hpspdra.HP.COM> <1991Jan11.013203.13763@dartvax.dartmouth.edu> <1991Jan11.171935.3488@ux1.cso.uiuc.edu>
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 21

In article <1991Jan11.171935.3488@ux1.cso.uiuc.edu> resnick@cogsci.uiuc.edu (Pete Resnick) writes:

>driver journal events and pass them along to check for idle time. Since

The Joournalling mechanism is "owned" by MacroMaker these days. Apple
says we shouldn't use it. (Besides, it doesn't work very well under A/UX)

>a device driver can do nasty things at accRun time like Quickdraw routines,
>you can just do exactly what your application does to blacken the screen.

What about a faceless background task calling SystemTask() ... ?

>And drivers should be supported ad infinitum and under AUX.

HAH ! Not many drivers are supported, since they have to run in
user mode and don't mess with hardware or memory mappings or just
about anything.

							H+

Jon W{tte, Stockholm, Sweden, h+@nada.kth.se