We(the fans) recently succeeded in adding 2600-daptor compatibility to the Retron 77. In testing this, I noticed some strange paddle behavior with my 2600-daptor upon which I thought you might have some insight. I hadn't really used it for paddles before, so I'd not seen this before.
I'm using my Coleco Gemini 'Dual Command' paddles in their 'Y' adapter. They are newly repaired and cleaned, FWIW.
The 2600-daptor is a 2600-daptor II flashed with the "2600-daptorII TB FB1" firmware.
Demons to Diamonds works perfectly. Super Breakout works perfectly. Video Olympics is... strange. It acts as though there is invisible bubble gum sticking the paddle to the screen in a particular spot about an inch up from the bottom for both paddle 1 and 2. On the Retron, and also on my desktop machine in Stella, I get the same effect. When the paddle is about to reach the bottom of the screen, it stops, and there is a dead zone of movement, followed by normal movement *at* the bottom of the screen. Again, the behavior is the same for both paddles(and both players,) and it is entirely consistent.
I see something similar in (normal)Breakout, but less pronounced. The paddle 'skips' the dead zone when almost to the left side of the screen instead of doing the virtual shoe in bubble gum routine.
In MAME 0.185, Video Olympics(same ROM) skips the dead zone entirely, with the paddle never occupying that space at all AFAICT, using the default paddle settings in MAME, as I'm sure that I could eliminate the dead zone by tweaking settings in MAME.
Is my 2600-daptor II malfunctioning?