Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!apple!han
From: han@Apple.COM (Byron Han, wyl E. coyote )
Newsgroups: comp.sys.mac.programmer
Subject: Re: Installing a CODE as a VBL
Message-ID: <31489@apple.Apple.COM>
Date: 24 May 89 06:25:43 GMT
References: <5586@hubcap.clemson.edu>
Organization: Apple R&D - Networking & Communications
Lines: 24

In article <5586@hubcap.clemson.edu> mikeoro@hubcap.clemson.edu (Michael K O'Rourke) writes:
>I am trying to install a precompiled LSP unit as a VBL task.  I compiled it
>as a CODE resource and all it does is a sysbeep(1).
>
You do realize that VBL tasks, when they run, are run at interrupt level
where calls to the Memory Manager (and calls to the Resource Manager)
are not legal?

A VBL task that beeps via SysBeep will need to load the 'snd ' resource for
the beep which is a call to the memory manager and resource manager.

This is like crossing the beams (apologies to Ghostbusters)

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