Hi Atari Gurus!
I never had an Atari, but a c64 during my chlildhood. I own a Turbo Chameleon 64 since the january of 2015, and I use Your Atari800XL core with the greatest pleasure! Some of the Atari games (i.e. Keystone Kapers) were never ported to Commodore platforms.
Nowadays I play a lot 4-player, 4-joystick games with my friends (the TC64's Docking Station has four DB9 connectors, just like the original Atari 400 or 800 computers).
I found cca. 30 c64:
and cca. 80 Amiga titles, which are using 4-player adapter:
I tried some of the Atari 8-bit family's 4 joy games, but none of them worked on the Chameleon:
You wrote in the Atari 800/5200 FPGA Core Manual, on side 2 / 13:
"Chameleon can either use the two joystick ports on a real Commodore 64 or use two of the four ports on the Chameleon docking station."
Mi question is: Is it possible to 'activate' the 3rd and 4th joy port of the Chameleon's Docking Station to use with Atari 4-joy games? The c64 and the minimig cores support this option.
Sorry for my poor english, I learned german in the school... :-)