Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!tut.cis.ohio-state.edu!usenet.ins.cwru.edu!usenet.INS.CWRU.Edu!bammi From: bammi@dsrgsun.ces.CWRU.Edu (Jwahar R. Bammi) Newsgroups: comp.sys.atari.st Subject: Re: Memory Expansion (summary) Message-ID: Date: 3 Feb 90 02:31:23 GMT References: <12334@wsucsa.uucp> Sender: news@usenet.ins.cwru.edu Organization: Case Western Reserve University Lines: 37 In-reply-to: mwjester@wsucsa.uucp's message of 2 Feb 90 03:34:21 GMT i guess i should add my two bits :-) i expanded memory in my 1040 using a John Russell Innovations SIMMS based expansion board. the board lets you use either 1M Simms or 256K Simms, but you cannot mix them. There are four Simm sockets on the board, and you can populate either 2 or all 4 sockets. It will accomodate either the x8 or the x9 Simms (they can be 80ns, 100ns or 120ns simms, 150's will work too,but are not recommended, and are hard to find in any case). An additional feature of this board is that it comes with sockets for two shifters. you pull the existing shifter out of its socket and install it in one of the sockets on the board. you can optionally buy a second shifter, and plug it into the second sockets for an expanded pallette (the board comes with software to support the JRI 4096 color technology). installation is quite easy if you are the handy type (6 solder points and two headers, took about 30 min total). it fits (very snug) under the shield (low profile SIMMS are *really* required for this). i have had the board in for over a month, and its been doing great. to me it made a lot of sense to use Simms instead of discrete chips, as they can easily be re-used or moved to other machines, including future atari ones. (they are quite cheap too now -- $85-90/1M Simm -- look at the ads in computer shopper). JRI can be reached at: john russell innovations PO Box 5277 Pittsburg, CA 94565 (yes, pittsburg CA not PA) (415) 458-9577 Unpopulated board costs $125 + shipping #include -- -- bang: {any internet host}!dsrgsun.ces.CWRU.edu!bammi jwahar r. bammi domain: bammi@dsrgsun.ces.CWRU.edu GEnie: J.Bammi