jib@prism.UUCP (12/30/87)
I am interested in expanding my Apple Memory Expansion card (for the IIGS)
from 512K to the full 1M. Current dealer prices are about $70/256K (8
chips, or about $8.75 each). I know the chips are 41256 DRAM chips, but a
letter in a recent InCider explained that there are two varieties of 41256
chips, and that the GS requires the "CAS-RAS" variety. Can anyone who
knows more about memory chips than I do, give me some pointers to
acceptable chips in the $3 to $4 each range?
Thanks.
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Jim Block {cca, ihnp4!inmet, mit-eddie, wjh12, datacube} !mirror!prism!jib
Matthew Bender Inc, 11 Penn Plaza, NY, NY 10001 (212) 216-8018dr@ski.UUCP (David Robins) (01/01/88)
In article <> jib@prism.UUCP writes: > >I am interested in expanding my Apple Memory Expansion card (for the IIGS) >from 512K to the full 1M. Current dealer prices are about $70/256K (8 >chips, or about $8.75 each). I know the chips are 41256 DRAM chips, but a >letter in a recent InCider explained that there are two varieties of 41256 >chips, and that the GS requires the "CAS-RAS" variety. Can anyone who >knows more about memory chips than I do, give me some pointers to >acceptable chips in the $3 to $4 each range? There is a good list in the Applied Engineering GS Ram manual. I use NEC , but they are also available from Hitachi (as the 50256), ans from Fujitsu, to name a few. You need the 150 nanosecond or faster - they have a suffix of -15 if 150 ns., or -12 if 120 ns. I bought mine from Jameco Electronics, from ads in maggazines. They carry the 41256, but they have both types of chips usually, CAS-before-RAS, and the regular type. Ask their technical department which is the current manufacturer of the CAS-before-RAS chips that they have in stock, and specify this to the person on the order phone. A few months ago they were $3.25 each, but I understand they are now up to $3.95 each. (They have NEC chips at the present.) -- -dave ==================================================================== David Robins, M.D. (ophthalmologist / electronics engineer) Smith-Kettlewell Eye Research Foundation (previously known as: Smith-Kettlewell Institute of Visual Sciences) 2232 Webster St; San Francisco CA 94115 415/561-1705 (voice) {ihnp4,qantel,dual}!ptsfa!ski!dr The opinions expressed herein do not reflect the opinion of the Institute!