Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!linus!philabs!cmcl2!harvard!husc6!panda!genrad!decvax!wanginst!wang!ephraim
From: ephraim@wang.UUCP (pri=8 Ephraim Vishniac x76659 ms1459)
Newsgroups: net.micro.mac
Subject: Re: Delphi Mac Digest V2 #21
Message-ID: <815@wang.UUCP>
Date: Tue, 3-Jun-86 09:11:04 EDT
Article-I.D.: wang.815
Posted: Tue Jun  3 09:11:04 1986
Date-Received: Thu, 5-Jun-86 19:10:55 EDT
References: <5077@topaz.RUTGERS.EDU>
Organization: Wang Labs, Lowell MA
Lines: 24

> From: DDUNHAM (8490)
> Subject: RE: Usenet Mac Digest V2 #41 (Re: Msg 8454)
>  
> To: ephraim@wang.UUCP Using a dynamic reserved slot doesn't sound like
> a real problem...at least if you reboot (and don't use them all).  And
> if you only have 1 SCSI device, should be no trouble there, either.
> Besides, I thought the dynamic slots were 28-31, not the ones above...

Using a dynamic reserved slot *is* a very dangerous thing.  Consider this:
My internal hard disk boots, and selects a dynamic slot which is open.
While running off the disk, I run MacPaint with ClickArt Effects installed.
I choose ClickArt Effects, which is installed in MacPaint as DRVR 31 (a
reserved slot).  The DA *replaces* the disk driver as driver 31 and the
Mac hangs....  When you open a driver with the same number as an open driver,
it's curtains for the older one.  ClickArt Effects comes with its own installer,
which installs only into MacPaint and doesn't give a hoot for the rules.
You can fix it by removing it with the Font/DA Mover (use option-open to
see all applications), then re-installing it.  FDAM follows the rules, so
you're safe.  But most people wouldn't recognize the problem.

Yes, 28-31 are the dynamic slots.  32-39 are the slots for SCSI devices
zero through seven.  But when you're installing DA's, how do you know 
what SCSI devices the user has?  Especially if some of them are used
intermittently, like tape backup devices?