Do I need to buy new carts just to have the recent firmware? I've emailed, even from different stresses on different domains in case it was going to spam. I've gotten updates via email before, but nothing in a couple years now, no replies at all.

I need to update the 5200 and Coleco carts. Is ordering new ones the only way now?

Surely not. No idea what is going wrong.

I have uploaded a coleco firmware some time ago.
viewtopic.php?p=13851#p13851
From a friends cartridge

I can do my 5200, but that is old (many years) already.

You can phone or contact steve, or drop a message on facebook.

I only check the other forums for updates and mainly manage the MyIDE section.

Hi, I e-mailed you information on firmware for this item. If you did not get my reply please try e-mailing atarimaxipad@gmail.com and I will reply from there.

Thanks,

Steve