Path: utzoo!dciem!nrcaer!scs!spl1!laidbak!att!rutgers!mtunx!mtune!mtund!newton
From: newton@mtund.ATT.COM (Newton Lee)
Newsgroups: comp.sys.mac.programmer
Subject: Vertical Retrace Queue Problem
Message-ID: <953@mtund.ATT.COM>
Date: 1 Jun 88 17:05:33 GMT
Article-I.D.: mtund.953
Organization: AT&T ISL Middletown NJ USA
Lines: 12



I've written a program that "VInstall" a function onto the vertical
retrace queue. The function does simple "PlotIcon". It works. Now
disabling VInstall, the main program calls "MacinTalk". It also works.
However, enabling VInstall, the whole thing suddenly stops working!
Why? I know there is a sound manager VBL problem in old System files.
But I'm using System File 4.2 that supposedly has fixed that problem.

Thanks for your help.

Newton Lee, ihnp4!mtund!newton, 201-576-3541