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C103277- REV.2.2 (other)

MEGA ST motherboards.
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Marsupilami
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C103277- REV.2.2 (other)

Post by Marsupilami »

Found this one in a garage sale last week with a megafile30 for...50€ 8-)

6xTOS (v1.02) and a strange black cable between C100110 and MB.
Almost everything is socketed.
The RAM banks are DILL-DRAM (not SMTs like this one).
Now i need to upgrade RAM to 4Mb and TOS. But i'm sure Exxos will have good advices for me ;)
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https://www.atarinside.com : Atari 800XL in Europe France/Italy/Benelux/Deutschland/UK White&Silver plastic boxes : Dumps, Videos, Books, reference list / + / as usual high resolution pictures of the Atari 800 XL motherboards.
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exxos
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Re: C103277- REV.2.2 (other)

Post by exxos »

:bravo:

Yeah various people do various hacks to upgrade the RAM.. The kit I sell which would work is this one. https://www.exxosforum.co.uk/atari/store2/#0035
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DoG
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Re: C103277- REV.2.2 (other)

Post by DoG »

That black wire is from factory. Looks like mine, but I got two chip TOS version. U12 needs a chip (SN74LS) and move W2 and W3 to the middle-right position. And remove W4. Easier to get TOS 1.04 on 6 chips.
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PhilC
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Re: C103277- REV.2.2 (other)

Post by PhilC »

Looks pretty clean to me, nice find.

The ram upgrade exxos mentioned is probably the easiest to fit as long as you can solder up the shifter adaptor.

There are other options but they aren't as straight forward. Such as dip to smt ram adaptors and robbing some smt chips from something like an 8mb 64pin sim but obviously much more complicated.
If it ain't broke, test it to Destruction.
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