This driver allow to use Ninja Tap device in BASIC programs.

It transparently manages joysticks whether they are connected directly to the MSX or via a Ninja Tap so it works even if no Ninja Tap is connected to the MSX.

Driver can be download at: https://github.com/aoineko-fr/MSXgl/raw/main/projects/samples/emul/bin/s_usr.bin (678 bytes in size).

It will be loaded at C000h address and must be connected using:

BLOAD "s_usr.bin"
DEF USR=&HC007 ' +7 bytes to skip the binary header

Once loaded, you have 3 functions available to manage the device:

1) To detect a Ninja Tap:

A=USR(0)

Return:
  7   6   5   4   3   2   1   0
  │   │   │   │   └───┴───┴───┴── Number of joystick ports available (2, 5 or 8)
  │   │   └───┴────────────────── Tap type pluged in port 1 (0=No Tap, 1=Ninja Tap, 2=Shinobi Tap)
  └───┴────────────────────────── Tap type pluged in port 2 (0=No Tap, 1=Ninja Tap, 2=Shinobi Tap)

2) To update all joystick data (Ninja Tap and normal joystick):

A=USR(-1) ' Should be call each frame (or every two frame)

3) To get data from a specified joystick (from 1 to the number of joystick given in first function):

A=USR(N) ' Where N can be from 1 to 8

Return:
  7    6   5   4   3   2   1   0
  │    │   │   │   │   │   │   └── Right direction
  │    │   │   │   │   │   └────── Left direction
  │    │   │   │   │   └────────── Down direction
  │    │   │   │   └────────────── Up direction
  │    │   │   └────────────────── Start bouton (for NES pad)
  │    │   └────────────────────── Select bouton (for NES pad)
  │    └────────────────────────── A bouton
  └─────────────────────────────── B bouton