This encoder has 32 inputs available, which is enough to connect 2 joysticks with 8 buttons each, 2 player start buttons, 2 coin inputs and now has an additional 4 inputs for extra buttons or whatever else you may wish to include.

I-PAC 2 (32 Inputs plus trackball and spinner connector/PAC-Link expansion)

I-PAC has 32 inputs each with it’s own dedicated microprocessor pin. No interaction or delays, vital for multi-button games such as fighting games.
I-PAC is much more than a keyboard encoder! Pins can be configured as mouse buttons or game controller buttons, plus power and volume control.
Multi-mode functionality enables interface to be switched into dual gamepad mode or dual Xinput controller mode.
I-PAC emulates a USB keyboard and yet breaks through the USB simultaneously-pressed-switch limit of 6 switches (plus ctrl,alt,shift) which afflicts all USB keyboard devices. This is beacuse it has inbuilt full native USB support, and does not rely on an add-on adaptor.
I-PAC has a shift function which allows ANY input to be assigned to a shifted secondary keycode and the shift button can have it’s own function too so no need for a dedicated extra control panel button.
I-PAC has a self-test LED which not only gives an instant visible check of your installation but also can indicate which connection (if any) is causing a problem.
I-PAC retains it’s programming including operation mode after power off. Beware! Not all keyboard encoders do this!

I-PAC (Interface for Pc to Arcade Controls) is a range of boards which allow connection of arcade controls such as buttons and joysticks to a USB port on a host system. It was designed around the MAME emulator which supports over 1000 arcade games and can be used with other emulators or any software which requires keyboard or game controller input.It is designed to be used inside an Arcade Games cabinet with the host system also mounted inside, but could just as easily be used with simply a control panel without a cabinet.
Special shift function buttons mean that a normal keyboard is only be needed for game loading and configuration, not for gameplay. All key codes can be programmed but you dont have to as you can use the built-in default configuration which has all standard MAME codes for quick and easy installation. Programmed keys codes are stored even after power off.

The I-PAC2 has 32 inputs. They are all programmable and are marked as 2 joysticks, 8 buttons each, plus coin1, coin2, start1, start2 and Mame control keys. Any inputs can be assigned as a shift key to access an alternate code set. This board also has a connector which can be configured to plug our trackball and spinner into, or for our console interf