13.013 I have 256kB on my 1MB Apple IIgs Memory Expansion Card. How do I add more memory and set the jumpers?
Description
This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
13.013 I have 256kB on my 1MB Apple IIgs Memory Expansion Card. How do I add more memory and set the jumpers?
The standard Apple IIgs 1MB Memory Expansion Card can be usefully
configured for 256kB, 512kB, and 1MB.
For 256kB, the top left 8 sockets (i.e. the left half of the top row)
should be filled. No jumpers should be placed on the pins near the lower right
end of the board.
XXXXXXXX--------
----------------
O O (no Jumpers)
0 0
For 512kB, the entire top row of sockets should be filled. The bottom pair
of pins should be jumpered.
XXXXXXXXXXXXXXXX
----------------
O O
0-0 Jumper bottom pair
For 1MB, all sockets should be filled. The top and bottom pairs of pins
should be jumpered.
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
O-O Jumper top and bottom pairs
O-O
To get the full IIgs mem card upgrade to 1MB you can order a kit of 24
256k x 1 41256 DRAM mem IC's from Alltech (760-724-2404) for $24.00.
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