Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!uakari.primate.wisc.edu!hemuli.tik.vtt.fi!fuug!news.funet.fi!hydra!cc.helsinki.fi!tmottonen
From: tmottonen@cc.helsinki.fi
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: Help
Message-ID: <1991Apr2.125712.5799@cc.helsinki.fi>
Date: 2 Apr 91 12:57:11 GMT
References: <1991Mar29.032128.15956@lynx.CS.ORST.EDU> <3173@beguine.UUCP>
Organization: University of Helsinki
Lines: 40

In article <3173@beguine.UUCP>, uchuck@med.unc.edu (Charles Bennett) writes:
> In article <1991Mar29.032128.15956@lynx.CS.ORST.EDU> morgand@prism.CS.ORST.EDU (MORGAN DENNIS ALAN) writes:
>>
>>	I recently bought a PS/2 55SX without the knowledge that MicroChannel
>>Architecture makes the PS/2 incompatible (hardware wise) with other pc's.  I
>>have some questions that I hope someone out there can answer.
[...]
>>		(3)  What type of memory does the PS/2 use?  I looked 
>>		     thoroughly through the so called manual and I couldn't
>>		     find anything on the type of memory used.  I need two
>>		     megs.  If anyone has some for sale, again I am 
>>		     interested in buying. 
>>
> The 55SX comes with two SIMM connectors.  I can take either 2Mb SIMMs (not
> very readily available but can be had) or 4Mb SIMMs (readily available but
> a bit pricey currently).  They can be mixed, i.e 2Mb in one connector and
> 4Mb in the other.  DO NOT buy your memory from IBM - real expensive, I
> made that mistake on the first 2Mb upgrade.  For more memory I recommend
> the Tecmar MicroRam AD card.  It has 8 SIMM connectors, must be used in
> pairs - either 256Kb or 1Mb SIMMs.  The Tecmar card has a real neat
> feature - it has a daughter board that takes up NO MORE space(slots) and
> can be configured for either 1 additional serial port and 1 additional
> parallel port or 2 additional serial ports.  You must use 80-85ns SIMMs on

    The Orchid RamQuest 16/32 Extra is also a good choice for a MC
    memory board. It can use 8 SIMMs, 256KB or 1MB ones. It can also
    be used in models 70 & 80 for true 32-bit memory (the card has the
    necessary connectors). It has one parallel and one serial port
    (serial cable included). The serial port uses the WDC 16550 chip,
    which is supposed to do FIFO-buffering. This board got good
    ratings in a PC Week Corporate Satisfaction Poll, and I've been
    very happy with it myself. I paid about $400 with two 1 MB-80ns
    SIMMs (from Bulldog).

    Teemu
-- 
                             _________
	Teemu Mottonen	    |         |	internet: tmottonen@cc.helsinki.Fi
    University of Helsinki  |         |   bitnet: TMOTTONEN@FINUH
   Dept.of Computer Science |_________|	  decnet: HYLK::TMOTTONEN