M2 Emulator binary .input files

Each 4 bytes correspond to an input, in display-order for a specific game.

The file ends with 8 bytes of 00 or 01 flags.
These signify whether an analog input in display-order is enabled.

Keyboard

For keyboard keys, the first byte corresponds to a DirectInput scan code, and bytes 2-4 are 0.

Joypad

For any joypad input, the 2nd nybble of the 2nd byte is the joypad number, starting from 1.

For joypad hats:

• The first byte is the hat and direction
  • 00 for hat 1 left
  • 01 for hat 1 right
  • 02 for hat 1 up
  • 03 for hat 1 down
  • 04 for hat 2 left
  • 05 for hat 2 right
  • 06 for hat 2 up
  • 07 for hat 2 down
  • (and so forth for additional hats)
• Bytes 3-4 are zero

For joypad buttons:

• The first nybble is the button number (1 - F, apparently limited to 16 buttons)
• The second nybble is 0
• Bytes 3-4 are zero

For joypad analog inputs:

• The first byte is the axis
  • 00 for X
  • 01 for Y
  • 02 for RZ
  • 03 for Z
  • 04 for RX
  • 05 for RY
  • 06 for S1 (untested)
  • 07 for S2 (untested)
• The first nybble of the 2nd byte is a 0 or 1 inversion flag
• Bytes 3-4 are 00 FF

Examples

4-byte inputs:

• 02 00 00 00 is keyboad 1
• 10 01 00 00 is joy 1 button 1
• 10 02 00 00 is joy 2 button 1
• 01 01 00 00 is joy 1 hat 1 right
• 05 01 00 00 is joy 1 hat 2 right
• 01 01 00 FF is joy 1 Y-axis
• 01 11 00 FF is joy 1 Y-axis inverted

8-byte file endings:

• 01 00 01 00 00 00 00 00 specifies that the first and third inputs with checkboxes have analog enabled