utilizing old 30 pin SIMMS for scratch pad memory

Archiver

Hello All,
I thought there was some information somewhere about
re-vitalizing old 30 pin SIMMs for a memory scratch pad.

I'm building a wooden Ferris wheel (30 inch diameter!)
for my daughter and of course need to equip it with sound
and lights.

I didn't want to re-invent the wheel with regards to using
some old 30 pin SIMMs and seem to remember some documentation
on how to interface them to a BS1 or BS2. I have an idea,
based on the pin-out of the SIMMs and other external memories
I have used in the past, but as I said I didn't want to
re-invent the wheel by running into a "gotcha". I'm a little
confused with the memory organization (matrix) with address
lines multiplexing to RAS and CAS.

I think that the matrix pretty much can be thought of as a
square, where RAS and CAS "always" have the same number of
address lines, but I need someone to confirm this....

2^11 = 2048 (2048x2048) = 4Meg
2^10 = 1024 (1024x1024) = 1Meg
2^9 = 512 ( 512x 512) = 256K
2^8 = 256 ( 256x 256) = 64K

Thanks!
-Beau Schwabe