Ninja tap

Thanks again, Jipe. It narrows the ploblem to the GETNIN function. I will take a closer look then. (edit)

I think I found the problem, I am checking the Tap on joystick port 2.

...
; scan taps
   ld de,0fa7ah  ;	
   ld hl,ntapData
   call GETNIN ; read TAPS
...

One of my first thoughts was to use port 2 and let port 1 free for the user so i can play other games with standard joystick without having to disconnect the ninja tap.

The value of de for scanning port 1 should be 0xBA3A. Changed the value and it is working on openMSX emulator now!
You should be able to play using port 2 but I will update the code

try on real MSX with the Ninja Tap and work fine with 4 PLAYER
testing all configuration with CPU and PLAYER
good work Danjovic

yes i tried and work fine
i made a special version of this game for the Ninja Tap
https://msxvillage.fr/upload/mm3-ntap.dsk

For sure ! Thanks for your job.
In France, we have now new NinjaTap, and we will show this during our next meetings ;)

yes !!