cliff@cfa250.harvard.edu (Cliff Stoll) (01/27/89)
I'm upgrading a Mac plus from 1.0 Mbytes to 2.5 Mbytes with a pair of 1 Mbyte Simms. What jumpers should I connect? Anything to be aware of? Many thanx! Cliff Stoll cliff@cfa200.harvard.edu -- cliff stoll cliff%cfa204@harvard.harvard.edu 617/495-7147
elliston@rob.UUCP ( Keith Elliston) (02/02/89)
In article <1215@cfa204.cfa250.harvard.edu>, cliff@cfa250.harvard.edu (Cliff Stoll) writes: > I'm upgrading a Mac plus from 1.0 Mbytes to 2.5 Mbytes > with a pair of 1 Mbyte Simms. > > What jumpers should I connect? I have done this upgrade on my plus, and there are not any jumpers... what you do have to do, is to clip a resistor. Now... if you are going to 2.5, and wont be going to 2 or back to 1, you clip the resistor that says"256K" (i th I think that this one is either r8 or r9...) Anyway, clip it out. Then, you have to insert your simms into one back, and that bank has to be bank #1, the bank that is closest to the MC68000 (or the center of the motherboard). Both SIMMS must go into one bank, and must be of the same speed and size. > > Anything to be aware of? Yes.. . dont touch anything on the video board, or you could get one heck of a zap. Also, make sure that you pull out the scsi cable and video cables from the motherboard before removing it. It helps to make sure it is all disconnected before you attempt to move the motherboard. One more thing.... Take a look at the inside of the box. In mine (I assume it is the same as the others...) you can see where Steve Jobs and the rest of the team signed the mold. Makes for interesting conversation.> > Many thanx! > Cliff Stoll cliff@cfa200.harvard.edu i Keith uunet!rob!elliston -or- elliston@rob.uucp
chn@a.lanl.gov (Charles Neil) (02/02/89)
In article <324@rob.UUCP>, elliston@rob.UUCP ( Keith Elliston) writes: < In article <1215@cfa204.cfa250.harvard.edu>, cliff@cfa250.harvard.edu (Cliff Stoll) writes: < > I'm upgrading a Mac plus from 1.0 Mbytes to 2.5 Mbytes < > with a pair of 1 Mbyte Simms. < > < > What jumpers should I connect? < < < I have done this upgrade on my plus, and there are not any jumpers... what you < do have to do, is to clip a resistor. Now... if you are going to 2.5, and wont < be going to 2 or back to 1, you clip the resistor that says"256K" (i th < I think that this one is either r8 or r9...) Anyway, clip it out. Then, you < have to insert your simms into one back, and that bank has to be bank #1, the < bank that is closest to the MC68000 (or the center of the motherboard). Both < SIMMS must go into one bank, and must be of the same speed and size. < > I'm getting 4 Megs for my Mac II. Can I use the 1 Meg worth of 256K SIMMs that are now in the II for the Plus? Does anyone make a kit to do this? -- Charlie Neil (chn@lanl.gov) Los Alamos National Laboratory (505) 665-0978
elliston@rob.UUCP ( Keith Elliston) (02/04/89)
In article <821@a.lanl.gov>, chn@a.lanl.gov (Charles Neil) writes: > I'm getting 4 Megs for my Mac II. Can I use the 1 Meg worth of 256K > SIMMs that are now in the II for the Plus? Does anyone make a kit to > do this? > -- I had a note in my mbox that was from someone who has the adapters.... but I flushed it... Anyone got a lead on them?? (I know DOVE provides them with their 2MB upgrade.) Keith