I have three AV (S Video) modded Atari 2600's that I have tested with the RetroTINK 2X.
I've had no problem running cartridge games. However, running games from the Harmony Cart has had the same issues with all three systems.
Note: One of my 2600's has the Longhorn AV kit installed and the other two have the AV kits from Electronic Sentimentalities.
Some games stumbled at start-up...but then ran OK. Others won't run at all.
For those of you, who have a similar set-up, please consider trying to run [Fast Food], [Battlezone] and [Moon Patrol] from your Harmony Cart...and reply with your experience.
Hope everyone had a great Christmas!
Edited by StephenJ, Thu Dec 27, 2018 8:34 PM.