Lego board, memory expansion questions

[adrianw@cassius.ee.usyd.edu.au (Adrian Whichello)]

Hi Gang,

I was given a Rom 01 box last week. No keyboard, no monitor, but it does work,
so it'll be useful for spares. Inside there was a IIgs Memory Expansion Card
(25 6K installed) and a Lego 9767 interface card. My questions:

1) can somebody tell me about the Lego card, like what it does and what would
be needed to use it (both Lego and Apple II ends)? There's a 6522 VIA chip, a
couple of 74LS TTL chips (for address decoding, I expect), a transistor and it
comes out on a male 20 pin IDC (like a disk ][ plug) that clamps on the IIgs's
case.  Weren't chips like this documented in one of Rodney Zak's books?

2) If I ever wanted to expand the memory card (unlikely - 1.25M in a rom 01 is
still fairly useless for gs/os, but you never know, I might be given a rom 3
next time!), where is a good place to find 256K x 1 bit ram chips nowadays?

3) OA-control-esc brings up the control panel dialogue like usual, but it's on
the 80 column screen width (my rom 3 uses the 40 column screen). Is this a
difference between rom 01/rom 3's?

--
Dr Adrian Whichello                                  Phone: +61 2 9351 5339
Imaging Science and Engineering Laboratory             Fax: +61 2 9351 3847
Sydney University Electrical Engineering      Email: adrianw@ee.usyd.edu.au
Australia                           WWW: http://www.ee.usyd.edu.au/~adrianw

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