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Appendix F : RAM expansion for the PC
NOTE : Ensure that there is no power to the Amiga or Sidecar.
RAM (memory) expansion for the Sidecar can be carried out in
two different ways.
a)
Eight empty sockets (U9-U16) are located on the front
right-hand side of the main board. These will accept eight
dynamic RAM chips (256K x 1, 150ns) for expansion up
to 512K. Insert the chips carefully with the front of the
chip facing to the left. To make the RAM expansion on
the main board active you have to set up the jumper J ll
(see picture 4 and 5).
When the expansion is done, the appropriate DIP switch
must be set (See Appendix A.)
b)
A RAM expansion card, which is available from several
suppliers may be inserted into one of the slots. Depending
on the card, the memory is expanded up to a maximum of
640K. You can do the expansion with the base of 256 K
on the main board plus 384 K on the expansion card.
The alternative is to do the expansion up to 512K on the
main board (see paragraph a, above) and the other 128K
on the expansion card.
If the internal RAM expansion is active, the start address
for any RAM expansion card must be $80000. If it is not
active, the start address for the external card is $40000.
When the expansion is done, the appropriate DIP switch
must be set (See Appendix A.)
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