C103088 Rev.2.A
- Marsupilami
- Posts: 15
- Joined: Tue Apr 03, 2018 5:55 pm
- Contact:
C103088 Rev.2.A
Ram is a bit strange...I don't know how to upgrade it...
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.
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.
- Marsupilami
- Posts: 15
- Joined: Tue Apr 03, 2018 5:55 pm
- Contact:
Re: C103088 Rev.2.A

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.
- sandord
- Trusted Guru
- Posts: 593
- Joined: Mon Aug 13, 2018 10:08 pm
- Location: The Netherlands
- Contact:
Re: C103088 Rev.2.A
Just reposting a copy of the main board image here because OP posted a link to an external site, which are prone to going offline/break after time.
Re: C103088 Rev.2.A
Thanks, I've uploaded all the images. We are actually talking about this type of "problem" in the moderator forum as well

4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.