sho@maxwell.physics.purdue.edu (Sho Kuwamoto) (02/09/90)
Thanks to all who replied. From the info received, and a call to my local Apple dealer, it seems the following is the case: Certain Mac IIs *are* defective, in that a PMMU cannot be plugged in. Symptom? When the machine is booted, the screen goes blank. Apple will provide a free motherboard swap. You machine will be affected if you have Rev. A ROMs. They moved to Rev. B ROMs sometime around February 1988. -Sho -- sho@physics.purdue.edu <<-- the public should know.
kateley@Apple.COM (Jim Kateley) (02/11/90)
In article <3092@pur-phy> sho@maxwell.physics.purdue.edu.UUCP (Sho Kuwamoto) writes: >You machine will be affected if you have Rev. A ROMs. They moved >to Rev. B ROMs sometime around February 1988. Actually, there are two seperate repair extenstion programs for the Macintosh II. The first, announced in Feburary of 1988, addresses a ROM glitch where NuBus cards with more than 1MB of address space cannot be accessed. This is the "Rev A to Rev B" program. Your dealer can see page 8.4.13 of their service programs binder for details. The other, announced in August of 1989, is for the HMMU/PMMU socket situation where the socket for the PMMU on some units does not have all the necessary pins for a PMMU to function (although it does have enough pins for the HMMU). Your dealer can see page 8.4.14 of their service programs binder for details. In the first case, you would have a problem if you had a NuBus card that required more than 1MB of address space. In the second case, your MacII would not work if you installed a PMMU. Both situations require a main logic board swap, which is at no cost to you. > >-Sho >-- >sho@physics.purdue.edu <<-- the public should know. -- Jim Kateley UUCP: {sun, voder, nsc, mtxinu, dual}!apple!kateley S,P,HnS! DOMAIN: kateley@apple.COM Applelink: kateley1 Disclaimer: What I say, think, or smell does not reflect any policy or stray thought by Apple Computer, Inc.