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- From: wolfeman@apple.com (Dan Wolfe)
- Newsgroups: comp.sys.mac.system
- Subject: Re: System Enablers, What Are They?
- Message-ID: <1993Jan12.180326.24234@mumbo.apple.com>
- Date: 12 Jan 93 18:03:26 GMT
- References: <1993Jan12.024300.24218@netcom.com>
- Sender: news@mumbo.apple.com (The News System)
- Organization: Apple Computer, Inc.
- Lines: 64
-
- In article <1993Jan12.152840.27057@tdb.uu.se> Mats Bredell,
- bredell@tdb.uu.se writes:
- >Robert Abeles (rabel@netcom.com) wrote:
- >
- >[text deleted]
- >
- >: I checked his system carefully, and found that he had a file that I had
- >: never seen, something called 'System Enabler 111'. By installing a
- >: new system on his HD, then putting this 'System Enabler 111' into
- >: his system folder, then reinstalling his HD into his PB160, we got
- >: him back into business. A couple of questions:
- >:
- [Stuff Deleted]
- >
- >Starting with system 7.1, Apple will not make a new system version for
- every
- >new Macintosh model. Instead, they all use the same system version, and
- the
- >new models add an extension called a system enabler. The problem is that
- the
- >installation disks now have to be different. There's a separate install
- boot
- >disk for the IIvi/IIvx, one for PB 160/180, one for PB Duo 210/230, and
- one
- >for all the rest.
-
- Yep that's right - it's call Install Me First for X ; where x is the new
- CPU.
-
- >I'm not sure on this, but I think a system enabler can do bad things if
- it's
- >used on the wrong model. This is probably the reason why an install for
- all
- >macs doesn't install all the enablers.
-
- Nope, this isn't correct. Having the wrong enabler will not do anything
- bad otherwise Apple would be getting sued right and left and we wouldn't
- be that foolish would we? Each Enabler is writing for a specific set of
- CPUs. When the system first boots up it looks in the system folder for
- the enabler with the latest timestamp and check to see if this enabler
- can boot the CPU. If it can great, if not it goes on to the next
- enabler. In the above example, if you had a IIvi/IIvx enabler (it's
- number 001) and a PB 160/180 Enabler (111) on a IIvx, it would first
- check the 111 enabler to see if it could boot the IIvx. Since the 111
- enabler cannot boot the IIvx it would look for the next enabler, the 001.
- Since this could boot the CPU it would be used. Say you had a Quadra
- 700 (aren't you lucky), since this was a released machine at the time 7.1
- shipped, the enabler to boot this machine is built into 7.1. I hope this
- clarifies thing a little. To summarize, there is nothing wrong with
- having multiple enablers within a given system folder - only the proper
- one will be used to boot the system - they will only take up disk space.
- :-)
-
- [stuff deleted]
-
- >Mats Bredell Mats.Bredell@udac.uu.se
- >Uppsala University Computing Center (UDAC) Ph: +46 18 187817
- >Department of medical systems Fax: +46 18 187825
- >Sweden Think straight - be gay!
-
- Dan Wolfe
- Apple Computer Inc Internet: wolfeman@apple.com
- Disclaimer: This are my own opinions, Apple doesn't pay me to be a
- spokesman.....
-