Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!uunet!unhd!AntHill!rea From: rea@AntHill.UUCP (Robert E. Anderson) Newsgroups: comp.sys.amiga.hardware Subject: Re: 256K simms on an Amiga? Message-ID: <1881c042.ARN08b1@AntHill.UUCP> Date: 11 Jan 91 23:09:06 GMT References: <19620010@hp-lsd.COS.HP.COM> Reply-To: rea@AntHill.UUCP Followup-To: comp.sys.amiga.hardware Organization: SAAUG Lines: 38 In article <19620010@hp-lsd.COS.HP.COM>, Dave K. Martin writes: > The 8-up board from Microbotics will use 256k simms but only if you have the > early 'A' model board. The later 'B' model (revision?) board accepts only dip > memory chips. The other thing to look for is the type of simm modules that > you have. By far, the most common are the 256x9 simm modules where there > are 8 data chips and 1 chip used for parity checking. This is the type used > in IBMs and their thousands of clones. This type cannot be used by the 8-up > board (or any other Amiga expansion device I believe) as the Amiga does not ***** THIS IS NOT TRUE ***** 9 bit (parity SIMMs) will work perfectly with any SIMM board I have ever seen. I have owned the Microbotics 8UP! and I am currently using the GVP II+RAM board with 9 bit SIMMs. The SIMMS are the same size, 8 bit ones have one chip missing (usually), but the pin cound is the same, they are the same size, and look no different other that having a few more active pins and an extra chip were the holes are on the 8 bit SIMMs. > use the parity checking. The 8-up boards use 256x8 or 1mx8 simm boards like > are used in the Macs. Microbotics also makes a small board where you can > plug in individual dip chips in then the whole board plugs into the simm > sockets on their 8-up board. > > If you have the correct simm's, I don't think you could go wrong with an 8-up > board. I've had my A model with 4-megs in the pop-simm boards for some time > and it has caused no problems of any kind (except the expense of populating > it :) ). The other boards are probably just as good but I don't have any > experience with theem. > > > Hope this helps..... ---------------------------------------------------------------- Robert E. Anderson From the Ant Hill Research Computing Center unhd.unh.edu!AntHill!rea Durham NH 03824 Amiga 2000 UUCP / Dillon ---------------------------------------------------------------- "Welcome my son, welcome to the machine." - Pink Ployd