Antón_

Does your 6switch have any other mod? I have only made the simple composite video ouput. I'll try to recap the Atari. As yours works, maybe has something to do with power issues or so.

Thanks. Just if it helps, made 2 vídeos, of the same console Atari 2600 6switch light. One, running my all time favorite: H.E.R.O. And another one not booting the UnoCart that works without fault on an Atari 2600Jr: Some times, it's totally black screen. Other times, it's some weird vertical lines. It's a shame, because UnoCart was mainly for ussing on the beauty 6switches. Hope we can find the problem

Nope, it never worked on the 6switches. But it worked fine with both firmwares with the Jr. ?‍♂️

After updating to v17, my UnoCart still doesen't boot on a light 6switches. Just colour screen or some bars. Cart works perfect on a Jr, but unable to run on the old one ?