woo@pioneer.UUCP (06/20/87)
Is there any convenient way to add memory to a Mac II except for adding SIMMS? How about 1MB chip SIMMS? I would much rather buy a NuBus Board with extra sockets that I could fill later with inexpensive chips. Any such products available? Alex
stew@endor.UUCP (06/21/87)
In article <1838@ames.UUCP> woo@pioneer.UUCP (Alex Woo) writes: >Is there any convenient way to add memory to a Mac II except for >adding SIMMS? How about 1MB chip SIMMS? > >I would much rather buy a NuBus Board with extra sockets that I could >fill later with inexpensive chips. Any such products available? > >Alex 1MB SIMMs will work fine, they are just rather expensive. From Apple, they list at $1000 per pair, and you must buy an even number of pairs (two to give you 5 Mb total, four to give you 8Mb plus one useless set of 256Mb SIMMs). If you have a plus or SE which happens to have 120ns chips (some do, some don't, and this doesn't seem to correlate with age), then you can buy one set of 1Mb SIMMs for $1000 (or whatever), put them into your SE or Plus, and take all four 256KB SIMMs out and put them in your Mac II. That'll give you 2Mb in each machine. That's in fact what I have done. NuBus boards are limited to 1Mbyte each, at present, due to the limited way in which the bus is mapped for compatibility with the 24 bit Mac OS and fake MMU. This breaks down into 1MByte mapped to each slot, 8MB to motherboard memory, 1MByte mapped to ROM, and 1MByte for the I/O devices on the motherboard, for a total of 16Mb or 2^24 bytes. There's also the problem that the NuBus space is not contiguous with the motherboard RAM, I don't think the system would automatically be able to use it. Your application would have to know about it somehow and use it itself. Stew Rubenstein Cambridge Scientific Computing, Inc. UUCPnet: seismo!harvard!rubenstein CompuServe: 76525,421 Internet: rubenstein@harvard.harvard.edu MCIMail: CSC
juracan@ihlpl.UUCP (06/24/87)
In article <2364@husc6.UUCP>, stew@endor.harvard.edu (Stew Rubenstein) writes: > > 1MB SIMMs will work fine, they are just rather expensive. From Apple, > they list at $1000 per pair, and you must buy an even number of pairs ... > Stew Rubenstein > Cambridge Scientific Computing, Inc. > UUCPnet: seismo!harvard!rubenstein CompuServe: 76525,421 > Internet: rubenstein@harvard.harvard.edu MCIMail: CSC Is there any other supplier of 1 MB SIMMs besides Apple? Price? Availability? Ted Alonso ihlpl!juracan -- ----------------------------- - Ted Alonso - - ihnp4!ihlpl!juracan - -----------------------------
jww@sdcsvax.UCSD.EDU (Joel West) (06/26/87)
Levco Enterprises, 619 457 2011, is selling SIMMS. Cannot vouch
for price or quantity available....
--
Joel West
{ucbvax,ihnp4}!sdcsvax!jww or jww@sdcsvax.ucsd.edugrayson@cartan.Berkeley.EDU (Matthew Grayson) (06/26/87)
I just bought 4 used 256K SIMMS (from Mac+'s, I presume) and installed them in a Mac II. No problems so far. It just seemed that with 4 meg costing > $1000, that a cheap extra meg was worth it. I run TeXtures with a 700K font file and 300K of format file, and the extra RAM is a blessing. Since alot of people are getting SIMM upgrades for their Macs, there should be alot of extra 256K SIMMS out there. Highly recommended! Matt