amr@ee.egr.duke.edu (Anthony M. Richardson) (04/15/91)
I've seen memory prices posted in this group, but I haven't seen anything telling me how to install memory in my slab. (I've checked the printed documentation, the FAQ list, and NeXTanswers.) Specifically, do the four meg simms have to be installed in particular banks? The specs indicate that I can have 8 to 32 meg installed on board. The 32 meg limit implies (to me) a limit of 8 four meg chips. Do the four meg chips have to replace the one meg chips in the lower two banks? Also, what about parity? If I want parity checking (I don't, but I am curious) I have to replace the factory installed memory with parity ram, right? Thanks in advance for any answers or providing a pointer to appropriate documentation. Tony Richardson amr@egr.duke.edu
hardy@golem.ps.uci.edu (Meinhard E. Mayer (Hardy)) (04/16/91)
In article <1403@cameron.egr.duke.edu> amr@ee.egr.duke.edu (Anthony M. Richardson) writes: > Specifically, do the four meg simms have to be installed in > particular banks? The specs indicate that I can have 8 to 32 > meg installed on board. The 32 meg limit implies (to me) a limit > of 8 four meg chips. Do the four meg chips have to replace the > one meg chips in the lower two banks? This has been answered before, but here goes: In principle, the 4MB chips should fill the 4 banks near the power supply, but several people posted notes saying that the other way works too; for extracting the 1 MB simms a special tool is useful (you have to unhook tabs and pull on them; extra hands are also useful). The 20 MB configuration (remove 4 1MB csimms and replace by 4x4MB seems to be quite popular -- and should cost no more than about $ 750, allowing credit for the 1 MB simms). > > Also, what about parity? If I want parity checking (I don't, but > I am curious) I have to replace the factory installed memory > with parity ram, right? Yes -- you can mix parity and non-parity, but can' have parity checking. Greetings, Hardy -------****------- Meinhard E. Mayer (Hardy); Department of Physics, University of California Irvine CA 92717; (714) 856 5543; hardy@golem.ps.uci.edu or MMAYER@UCI.BITNET