AWCTTYPA@UIAMVS.BITNET ("David A. Lyons") (08/10/88)
>Date: Tue, 9 Aug 88 13:01:18 GMT >From: pitt!cisunx!mtkst@CADRE.DSL.PITTSBURGH.EDU >Subject: Utility wanted >Now that there are programs to install DAs into the Apple IIgs, how >about a program to _deinstall_ them? Would save me some re-boot time >getting to a 0 DA installed desktop. Thanks, >Evan Ron Aussenberg >mtkst@unix.cis.pittsburgh.edu <for awhile, anyway> The following phrase isn't in my usual vocabulary, but: Sorry, it can't be done. I don't mean that there simply isn't a defined way to remove the DA from the desk manager's private data structures. (There isn't, but you could always cheat and make it work for a particular version of the desk manager.) The real problem comes when you deallocate the memory owned by the CDAs and NDAs. DAs are free to install HeartBeat interrupt tasks and to intercept system vectors and toolbox functions into their own memory, usually *chaining* into the vectors and keeping the old value somewhere internally to jump to after taking some action themselves. Since several DAs, setup files, etc., may chain into the same system vector, figuring out *which* vectors are intercepted by a particular DA is hopeless. Writing a utility to deinstall *all* DAs at once would present fewer problems, but it would still have to be tied down to a particular version of the system software. So, my recommendation is to forget about deinstalling DAs and just wish Real Hard for a faster-booting system disk! --David A. Lyons a.k.a. DAL Systems PO Box 287 | North Liberty, IA 52317 BITNET: AWCTTYPA@UIAMVS CompuServe: 72177,3233 GEnie mail: D.LYONS2