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From: XWUU@PURCCVM.BITNET
Newsgroups: comp.sys.cbm
Subject: Easy REU upgrade??
Message-ID: <90321.214606XWUU@PURCCVM.BITNET>
Date: 18 Nov 90 02:46:06 GMT
Organization: Purdue University
Lines: 30

I'm sorry that I don't remember who made the post, but I recently read in this
newsgroup that a Commodore Ram Expansion Unit may be easily upgraded by
simply popping the case apart and popping in additional memory in the form of
"cheap" DRAM chips.

This sounds too good to be true, so I am asking for more details to any of
you who may be familiar with the procedure.  If this is true:
   Which DRAM chips would you use for an REU 1764 to take it to 512K or above?
   Where does one find a good source for said chips?
   How do you get the case apart without trashing it?
   Will sockets be required or are there sockets already on board?
   If it is so cheap and easy, why all the fuss about 1750 REU's and their
      lack of availability?
   If it is so cheap and easy, why does Software Support International want
      $125 to UPGRADE a 1764 REU that you send in?!
   Once the upgrade is made, is there software available to make the extra
      memory useful; specifically, is there softwart available to allow GEOS
      to use all 512K?
...There are more questions I could ask, but...

On a related topic, has anyone seen or tried the new RAM expansion devices by
CMD.  It looks as though they have figured a way to use SIMMs rather than the
traditional DRAM architecture.  Any comments?  I am interested in the RAMLink
and am wondering just what its advantages really are.  How can you get a C64 to
 take advantage of over 4Mb of RAM?

Thanks in advance for tech answers about REU upgrades.

Kirk A. Janowiak
XWUU@PURCCVM