Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!rutgers!apple!claris!wombat
From: wombat@claris.com (Scott Lindsey)
Newsgroups: comp.sys.apple
Subject: Re: TWGS ROM bugs
Message-ID: <10098@claris.com>
Date: 7 May 89 10:52:57 GMT
References: <2719@puff.cs.wisc.edu>
Organization: Claris Corporation, Santa Clara CA
Lines: 29

From article <2719@puff.cs.wisc.edu>, by blochowi@cat28.CS.WISC.EDU (Jason Blochowiak):

> 	About the IRQ stuff: The TransWarp can slow itself down when the IRQ
> disable processor flag (Interrupt ReQuest) is set - so, if there's some timing
> critical routine (like I guess are used in the AppleTalk stuff) which sets
> the IRQ flag, it won't run at the wrong speed. I have this option disabled,
> and I haven't had any problems (the TWgs comes with it enabled, so as to not
> cause any problems), but I don't own/use AppleTalk.

I've been running mine w/ IRQ enabled, using AppleTalk/AppleShare without any
problems except for overheating (initially) for a couple of weeks.

Oh, in response to your mail (that I haven't responded to) about ROM address
space: after digging through the Firmware & Hardware manuals (I haven't been
able to check some other references to the Tech Intro to the IIGs or
Programmer's Intro (since I don't have those yet)), as far as I can tell,
TWGS uses space reserved for "ROM expansion."  That means it can only conflict
with other 3rd party stuff.  Apple reserves some banks for system/tools and
others for ROMdisk, but none of that is in the $Bx banks (where TWGS lives).

BTW, the other things that live in TWGS ROM are the CDA, the startup sound,
& the startup graphics.


-- 
Scott Lindsey     |"Cold and misty morning. I heard a warning borne in the air
Claris Corp.      |    About an age of power when no one had an hour to spare"
ames!claris!wombat| DISCLAIMER: These are not the opinions of Claris, Apple,
wombat@claris.com |    StyleWare, the author, or anyone else living or dead.