Installation manual

Installation
User Installed Ram
To install your own RAM, you need to purchase one or more sets of 64K or
256K dynamic RAM chips. Each set will have eight matching chips. That is,
they will be the same size, 64K or 256K, will be the same speed rating and
will be made by the same manufacturer. RAM on the RGB must always be
installed in -sets of eight in order to generate the additional 64K or 256K of
memory.
Chips installed in a group of sockets must g be the same type -- eight 64K
chips or eight 256K chips. Although mixing chips will not harm the RAM
or the card, you will lose the use of 192K of a bank of 256K chips if even one
64K chip is accidentally installed into the bank. Similarly, only 64K of a
256K chip installed into a bank of 64K chips is usable.
The dynamic RAM set should be eight 64K by one bit chips, or eight 256K
by one bit chips with a speed rating of 150 nanoseconds or faster. Although
200 nanosecond 64K or 256K DRAM chips may work in the computer, this
speed rating is not recommended. You should try to purchase a set of eight
RAMS that are the same speed and made by the same manufacturer to
minimize potential compatibility problems.
If you are unfamiliar with purchasing RAM, ask your dealer for Checkmate
Technology’s RAM Kit. The RAM in each kit is guaranteed to work with
MultiRam RGB when correctly installed, and are warranted for seven years by
Checkmate Technology.
RAM Removal
If you are replacing an existing extended 80-column card, you may want to
move the 64K RAM chips from it to the MultiRam RGB card. There are
several conditions that must be met in order to do this. Are the RAM chips in
sockets? If they are not you will be unable to remove them. Are the RAM
chips on the old card a bank of eight matching 64K chips? If they are not the
RAM on this card is incompatible with the MultiRam RGB card. Check the
speed rating for these RAM chips, 200 nanoseconds should be OK, but
Checkmate Technology recommends 150 nanoseconds or faster.
To remove chips from any card, you should use an “IC-puller” (an
inexpensive tool designed for removing integrated circuits, and widely
available at electronic supply stores). Lacking an IC-puller, an ordinary
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