SuperGrafx incompatibility with the XE-1 HE Pro

[SavagePencil]

Are there any known incompatibilities with joysticks and the SuperGrafx? My XE-1 HE Pro does not respond correctly on my SGX, but works fine on my Duo. I thought it might be due to the built-in multi tap on the joystick but confirmed that a multi tap and two pads work fine on the SGX.

Button mappings appear off: joystick commands are interpreted as Pause, all button inputs act like button 1, etc. Same deal if I switch off the SGX switch.

Hori Fight Stick Multi works fine, but *only* in 2–button mode.

Avenue 6 pad wigs out in 6-button mode but works fine in 2 button mode.

Using Chris Covell's Pad Test (I'm running on an Everdrive v2), I see that *any* non-DPad input results in all of the buttons getting pressed. That is, if you press Select, it lights up Select, Run, I, and II.

This is not how it behaves when running on the Duo.

[gojira54]

I have both, works OK for me

[SavagePencil]

So the question now is: is it in the Everdrive, the console, or the stick?