C103088 Rev.2.A

STF motherboards.
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Marsupilami
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C103088 Rev.2.A

Post by Marsupilami » Tue Jul 03, 2018 1:20 pm

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Ram is a bit strange...I don't know how to upgrade it...
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Petari
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Re: C103088 Rev.2.A

Post by Petari » Tue Jul 03, 2018 2:39 pm

That's 1MB RAM with 1 bit chips. Both banks filled. So, for upgrade you need to remove 1 (then to 2.5 MB), or both - (4 MB) existing banks. That may be problem for sure. Possible to leave them in, just connect chip select, output enable lines to +5V . And adding expansion then. Will it be OK or not depends - even inactive chips pull some power and load lines. Or maybe just get an STE :D
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Marsupilami
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Re: C103088 Rev.2.A

Post by Marsupilami » Tue Jul 03, 2018 3:08 pm

:lol: Yes you're right, i have a STE and a MegaST already but i like to do some improvment on theses good old Ataris...

Upgrading RAM will we hard indeed so i will let it "as is".

Here my main problem is to upgrade TOS (in French) to make it work with my ultrasatan+PPDrivers (it doesn't work on all my french STF with TOS 1.2) :(
I'm not sure a TOS upgrade will solve the problem anyway.
https://atarinside.dyndns.org : 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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