ghe@nucthy.physics.orst.edu (Guangliang He) (09/29/89)
I am going to upgrade the memory on my 1 Meg SE/30. But I've heard
different stories from different people. Some friends told me that I
can buy 4 1Meg chips and put them in to make a 5 Meg machine. Just a
minute ago, I called an apple dealer here in town. What they said is
that I have to take the 4 256k chips out first and then add 4 1 Meg
chips in, so it ends up with a 4 Meg machine. It is obviously someone
is wrong here. Could anyone out there tell me what is the truth?
Thanks a lot.
=======================================================================
USMAIL: Guangliang He | INTERNET: ghe@PHYSICS.ORST.EDU
Department of Physics | BITNET: hegl@ORSTVM.BITNET
Weniger Hall 301 |
Oregon State University |
Corvallis, OR 97331-6507 | PHONE: (503) 737-4631
=======================================================================dorourke@polyslo.CalPoly.EDU (David M. O'Rourke) (09/29/89)
ghe@nucthy.physics.orst.edu (Guangliang He) writes: > [problems gettting good info on upgrading his machine.] Your dealer is Wrong, you can add 4 addition simms of your choice to your SE/30 with out having to remove the existing 256K simms. You can add 4 256K simms for a total of 2 megs, You can add 1 megs simms for a total of 5 megs, or you can add 4 meg simms for a total of 17 megs {what the Mac OS would do with this config. at this point in time, I don't know}. Hope this helps. -- \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\|///////////////////////////////////////// David M. O'Rourke____________________|_____________dorourke@polyslo.calpoly.edu | God doesn't know, he would have never designed it like that in the first | |_ place. ____________________________________________________________________|
levin@BBN.COM (Joel B Levin) (09/29/89)
In article <12679@orstcs.CS.ORST.EDU> ghe@nucthy.physics.orst.edu (Guangliang He) writes: |I am going to upgrade the memory on my 1 Meg SE/30. But I've heard |different stories from different people. Some friends told me that I |can buy 4 1Meg chips and put them in to make a 5 Meg machine. Just a |minute ago, I called an apple dealer here in town. What they said is |that I have to take the 4 256k chips out first and then add 4 1 Meg |chips in, so it ends up with a 4 Meg machine. It is obviously someone |is wrong here. Could anyone out there tell me what is the truth? Your friends are right about your SE/30. If you have 4 256K SIMMs you can keep them and add 4 1Meg SIMMs (I'm not sure, you may have to shuffle them around). What dealer said is true for SEs (NOT /30!) and Pluses. They only have 4 SIMMs so if you want to put 4 1Megs in you have to remove the 4 256Ks. /JBL =
kent@sunfs3.camex.uucp (Kent Borg) (10/03/89)
In article <1989Sep28.200958.24055@polyslo.CalPoly.EDU> dorourke@polyslo.CalPoly.EDU (David M. O'Rourke) writes: >ghe@nucthy.physics.orst.edu (Guangliang He) writes: >> [problems gettting good info on upgrading his machine.] > > Your dealer is Wrong, you can add 4 addition simms of your choice to >your SE/30 with out having to remove the existing 256K simms. You can Almost. You can upgrade your SEx (aka SE/30) without *throwing away* your 256K SIMMs, but you will have to remove them to move them over to Bank B. Bank B can never have more memory than Bank A--except in the new IIci. -- Kent Borg "Then again I could be foolish kent@lloyd.uucp not to quit while I'm ahead..." or -from Evita (sung by Juan Peron) ...!husc6!lloyd!kent
dwells@Apple.COM (Dave Wells) (10/03/89)
In article <12679@orstcs.CS.ORST.EDU> ghe@nucthy.physics.orst.edu (Guangliang He) writes: > >I am going to upgrade the memory on my 1 Meg SE/30. But I've heard >different stories from different people. Some friends told me that I >can buy 4 1Meg chips and put them in to make a 5 Meg machine. Just a >minute ago, I called an apple dealer here in town. What they said is >that I have to take the 4 256k chips out first and then add 4 1 Meg >chips in, so it ends up with a 4 Meg machine. It is obviously someone >is wrong here. Could anyone out there tell me what is the truth? Yes, you can add 4 1MB SIMMs to your SE/30 to get a total of 5MB. Only catch is that you'll have to relocate the 256K SIMMs from bank A to bank B and put the 1MB SIMMs in bank a. This works like a charm. This is the same solution as for a Macintosh II, Macintosh IIx, and Macintosh IIcx, except that there's less room inside so you can't use most DIP (read over-size) SIMMs. Stick with SOJ. (Yes, this means that you can't use our own 4MB upgrade in the SE/30 since it uses DIP SIMMs. You have to use two of our 2MB upgrades, which use SOJ chips, or a third party SOJ based solution.) When you buy, just ask for SIMMs that use low-profile or SOJ RAM. -Dave -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Dave Wells, Apple Computer, Inc. MS: 37-O (408) 974-5515 Mail: dwells@apple.com or AppleLink d.wells or GEnie D.WELLS These opinions may be nothing more than the ramblings of a fatigued tinkerer -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
bmug@garnet.berkeley.edu (BMUG) (10/03/89)
In article <35202@apple.Apple.COM> dwells@Apple.COM (Dave Wells) writes: > >Yes, you can add 4 1MB SIMMs to your SE/30 to get a total of 5MB. Only catch >is that you'll have to relocate the 256K SIMMs from bank A to bank B and put >the 1MB SIMMs in bank a. This works like a charm. > >This is the same solution as for a Macintosh II, Macintosh IIx, and Macintosh >IIcx... We've heard that the IIci has an arrangement whereby it isn't necessary to relocate the 1 mb which comes with the machine to the "B" bank when adding SIMMs for more RAM. Is this true? Is it because new machines are shipping with the weird new quarter-MB SIMMs? Enquiring minds want to know... John Heckendorn /\ BMUG ARPA: bmug@garnet.berkeley.EDU A__A 1442A Walnut St., #62 BITNET: bmug@ucbgarne |()| Berkeley, CA 94709 Phone: (415) 549-2684 | |
dwells@Apple.COM (Dave Wells) (10/04/89)
In article <1989Oct3.144854.24428@agate.berkeley.edu> bmug@garnet.berkeley.edu (BMUG) writes: >In article <35202@apple.Apple.COM> dwells@Apple.COM (Dave Wells) writes: >>Yes, you can add 4 1MB SIMMs to your SE/30 to get a total of 5MB. Only catch >>is that you'll have to relocate the 256K SIMMs from bank A to bank B and put >>the 1MB SIMMs in bank a. This works like a charm. >> >>This is the same solution as for a Macintosh II, Macintosh IIx, and Macintosh >>IIcx... > >We've heard that the IIci has an arrangement whereby it isn't necessary to >relocate the 1 mb which comes with the machine to the "B" bank when adding >SIMMs for more RAM. Is this true? Is it because new machines are >shipping with the weird new quarter-MB SIMMs? > >Enquiring minds want to know... Yes, it's true. The Macintosh IIci is the first to allow the RAM in bank B to be of higher density than the RAM in bank A. In fact, you can install RAM in bank B and take the SIMMs out of bank A and the Macintosh will work fine. (Minus built-in video, which uses RAM from bank A.) This fantastic new functionality :-) is enabled by the new Memory Decode Unit chip that replaces the old GluChip from previous Macintosh II models. Besides some other things, it removes the RAM configuration restrictions that were present in previous Mac II's. If you're wondering where it is on the logic board, look for the large, square chip, under the SuperDrive, about halfway between the front and the floppy cable socket. The "weird new quarter-MB SIMMs" are just that. Weird, quarter-MB SIMMs. They use a different chip configuration because supplies of the normal chips at 80ns was/is insufficient. -Dave -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Dave Wells, Apple Computer, Inc. MS: 37-O (408) 974-5515 Mail: dwells@apple.com or AppleLink d.wells or GEnie D.WELLS These opinions may be nothing more than the ramblings of a fatigued tinkerer -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
captkidd@athena.mit.edu (Ivan Cavero Belaunde) (10/05/89)
In article <35221@apple.Apple.COM> dwells@Apple.COM (Dave Wells) writes: >Yes, it's true. The Macintosh IIci is the first to allow the RAM in bank B >to be of higher density than the RAM in bank A. In fact, you can install RAM >in bank B and take the SIMMs out of bank A and the Macintosh will work fine. >(Minus built-in video, which uses RAM from bank A.) > >This fantastic new functionality :-) is enabled by the new Memory Decode Unit >chip that replaces the old GluChip from previous Macintosh II models. Correct me if I'm wrong, but I was under the impression that the reason this is an important feature is that cycle-stealing for the built-in video slows down access to memory in bank A. The ability to have higher density memory in bank B rather than bank A should then result on a lesser performance degradation when using built-in video. If you have 5MB of RAM, and you put 4MB on bank A and 1 on bank B (the only possible configuration before), the 4MB will be "slower memory" than the 1MB. Thus it is useful and desirable to put higher density RAM in bank B when using built-in video. >-Dave -Ivanski "I'm going to kill everyone in this room" "Now that's darn rude." -The Joker and David Endochrine, _Batman: The Dark Knight Returns_ by Frank Miller Internet: captkidd@athena.mit.edu
dwells@Apple.COM (Dave Wells) (10/05/89)
In article <14877@bloom-beacon.MIT.EDU> captkidd@athena.mit.edu (Ivan Cavero Belaunde) writes: >In article <35221@apple.Apple.COM> dwells@Apple.COM (Dave Wells) writes: >>Yes, it's true. The Macintosh IIci is the first to allow the RAM in bank B >>to be of higher density than the RAM in bank A. In fact, you can install RAM >>in bank B and take the SIMMs out of bank A and the Macintosh will work fine. >>(Minus built-in video, which uses RAM from bank A.) >> >>This fantastic new functionality :-) is enabled by the new Memory Decode Unit >>chip that replaces the old GluChip from previous Macintosh II models. > >Correct me if I'm wrong, but I was under the impression that the reason this >is an important feature is that cycle-stealing for the built-in video slows >down access to memory in bank A. The ability to have higher density memory >in bank B rather than bank A should then result on a lesser performance >degradation when using built-in video. If you have 5MB of RAM, and you put >4MB on bank A and 1 on bank B (the only possible configuration before), >the 4MB will be "slower memory" than the 1MB. Thus it is useful and >desirable to put higher density RAM in bank B when using built-in video. > >-Ivanski You're absolutely correct. I wasn't saying why you might do something. Only that it is possible, and what changed to allow it. -Dave -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Dave (Gimme more MHz) Wells, Apple Computer, Inc. MS: 37-Y (408) 974-5515 Mail: dwells@apple.com or AppleLink d.wells or GEnie D.WELLS These opinions may be nothing more than the ramblings of a fatigued tinkerer -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
ccw@nvuxr.UUCP (christopher wood) (10/05/89)
In article <12679@orstcs.CS.ORST.EDU> ghe@nucthy.physics.orst.edu (Guangliang He) writes: > >I am going to upgrade the memory on my 1 Meg SE/30. They're both right. you buy 4 1 Mb SIMMs. To install them, you take out the 4 256K SIMMs, and put the 4 1 Mb simms in, where the 256K SIMMs were. You have a 4 Mb machine. Now you put the 4 256K SIMMs in the empty slots. 5 Mb. Mystery solved. -- Chris Wood Bellcore ...!bellcore!nvuxr!ccw or nvuxr!ccw@bellcore.bellcore.com