One Port Operation
The top port is used with software that calls for 1 joystick or 1 player games.
Adapter Not Detected
The better cards however supply ADFs and come with own card-ID - to avoid problems during automatic configuration and to define the used resources. But there are joystick cards for MCA that just "plug in" and need no ADF. Installed a few of them in 1988 or so for some customers who *claimed* it were for a serious purpose (but no one believed that ...).
Mouse Override under W9x?
Peter Fired Back:
And please keep in mind that "joystick" on these adapter cards does not mean one of these silly switch-triggered beasts but one with potentiometers (like on RC-car controls). See "sound" on Louis' page and look for the schematic diagram of the Audiovation joy-port. There's a small graphic on how the joystick is wired internally.
ADF Sections GPA-1000 Game port adapter
to activate the GPA-1000. Select DISABLE to
the GPA-1000 from the system."