museum : olivetti : m20bc : ramcard-mods : jumpers, 3

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jumpers, 3

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Here was a 32 Kb ram card for Olivetti m20.

We noticed that it can be switched from 32k to 128k, just changing the
chips on the board and adjusting some jumpers.

Here are the images of the card , original and without chips (so you can
check connections) and the modded card; just 3 jumpers and the card is now a
B/N 128kb.

p.s. note that wire cabling on back of the board were necessary to us
because we accidentally broke some connection while removing some
4116 chips. :( If you can do a clean work, no wiring is required for
converting this board: just 3 solder-jumpers! :)

Thanks to Dwight Elvey, Davide Bucci and the other M20 friends :)

p.s. page under construction, sorry for poor info here, we're working hard
:) Soon we will add comment about this mod, jumper meaning and so on.

          - vampire/asbesto 5/7/06 poetry hacklab


Photo album generated by album from Dave's MarginalHacks on Sat Jul 26 18:56:07 2008