darthcloud
Some Atari Jaguar games are unplayable due to button mapping issues
I have tested all 50 retail cartridge games as well as 4 CD games. The following games have a button mapping issue:
- Atari Karts On PS4/5 controller Pause = A, L1 = D-Pad R, D-Pad L = 4, R Thumb = D-Pad L. D-pad R, U, D and other buttons not working
- Breakout 2000 Same as Atari Karts
- Missile Command 3D Same as Atari Karts
- Myst L1 acts like D-Pad Left and R3 acts like D-Right
My test was with a PS4 and PS5 controller. I've tried to remap these games in the advanced web config but it didn't seem to have any effect.
Breakout 2000 issue look different than Atari Kart & Missile Command.
If you simply press right and B to start the game right away everything look fine to me. If you press down in the menu, then the game goes in an infinite loop.
Try this build, it will fix the infinite loop in breakout 2000, other than that, this game look completely fine to me.
Will look into the other next.
I can't really fix the other 3 games, the games is simply reading back the JOYSTICK/JOYPAD register too quickly after writing to it. TTL chip can handle it since they probably transition output in the 10ns, Using pretty much all the trick I could think off the ESP32 can only do between 300ns and 400ns transition.
This make those game read the previous buttons bank set. This look quite stable.
As a workaround, I a made a preset called "Jaguar cycle shift" (see https://blueretro.io/blueretro_presets.html) and using that both myst and atari kart are playable properly. You can't use that in the working games however. To help navigate the GameDrive I mapped the non-shifted d-pad on the left joystick.
Missile Command is still a bit broken, the main menu up/down dont work at all. The timing of bank transition is quite brutal at 1us (vs 8us for Atari Kart & Myst), but once in gameplay it kind of work?
An alternative workaround for GameDrive people would be to make rom hack of the games with some NOPs after setting JOYSTICK register.