For Want of a Newline
First up: I have the arcade working! The issue I was having is that the player two controls weren’t working. Everything else was woking just fine, except for the second set of controls.
I tried a bunch of things. Then I started to pore over the manual.
One step back: I bought the MiSTer and JAMMIX second hand on eBay. It was set up by someone else. I figured they followed the instructions. Well, it would’ve saved me time if they did.
There’s a small part of the manual:
It was nearly that. There was an unruly newline before usbhid. The options 0x040 is:
HID_QUIRK_DUPLICATE_USAGES
This actually explains it pretty well.
Adding it in — everything worked!