Try tunning GRAVUTIL first

Look in the back of the GamePad Pro Subjunctive and make sure the mode switch is set in the proper position.

For DOS games like Jazz Jackrabbit, the switch should be all the way to the right, like this:

This makes the GamePad Pro work like a standard 4-button gamepad, and any DOS game will recognize it. No drivers are needed.

No dice. Jazz still reports the following:

I started the game and tried anyway, but there was no response from the GamePad.

GRAVUTIL.EXE gives me this:

And when I try to do joystick calibration, it acts like nothing's connected.

I do have an SB16 in another slot, and it feeds its audio to the GUS's line-in. The two cards have always worked flawlessly together. I got the same results above regardless of whether or not I enable the SB16 on startup. I should have the GamePad connected to the GUS's joystick port, not the SB16's, right? (I actually can't put it in the SB16 without moving that card to another slot, due to protrusions that IBM unfortunately decided to put next to certain slots in this Aptiva.)

I also have the GUS's SB emulation disabled.

Would I perhaps have better results with an original GamePad model? I coincidentally have one on the way.

Subjunctive wrote:

I do have an SB16 in another slot

Did you disable the game port on the SB16? If you didn't, try that first, as multiple active game ports result in a hardware conflict.

Fixed! Turns out my revision of the GUS (v2.4) controls the gameport through a jumper. Moving JP2 to 'E' fixed things nicely.

Thanks to all for looking at this!