Ram is a bit strange...I don't know how to upgrade it...
C103088 Rev.2.A
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Marsupilami
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C103088 Rev.2.A
Ram is a bit strange...I don't know how to upgrade it...
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Re: C103088 Rev.2.A
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 
There is 2 kind of people: one thinking about moving to Mars after here becomes too bad, the others thinking about how to keep this planet habitable.
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Marsupilami
- Posts: 15
- Joined: Tue Apr 03, 2018 5:55 pm
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Re: C103088 Rev.2.A
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.