Ninja tap

No, but I use the driver included in DM-system 2 so don't imagine how it couldn't have the same behavior. ^^

BTW, I saw that a PCCM former member is still active on Twitter. I'll ask for original Driver. The one from DM-system 2 have some commented out code and I'm 100% sure it is the 'vanilla' one.

I have updated my MSXgl sample program to add Ninja Tap data retrieval function (through repeated reading of the joystick port) and stored data reading function. The support for this device is supposed to be complete now (I will add some helper functions later).
The sample ROM (plain 32 KB) can be found here: https://github.com/aoineko-fr/MSXgl/raw/main/projects/sample...
I had to work almost blind since I don't have the device at home. I'm waiting for confirmation that everything is working well from the people who have this hardware.

I don't have the DM-system 2 binaries so I can't test them (if your "try that first" was about that ^^).

I believe the game Magical Labyrinth Remix uses Ninja tap, being based on DM System 2.

Slightly different code to identify the Tap model and return the number of participants.

CHECKPLYRS:
; Return the number of players connected
; [E] None                     
; [R] C Tap connected info 
;     B number of players connected
	call CHECKTAPS
	ld b,0
	ld hl,TBPLRS
	add hl,bc
	ld b,(hl)
	ret
	
TBPLRS: ; unknown count as 1
   db  8,8,5,5,8,8,5,5,5,5,2,2,5,5,2,2

;   a1 a0 b1 b0   Tap a, Tapb   Count
;   0  0  0  0     4      4       8
;   0  0  0  1     4      4       8
;   0  0  1  0     4      1       5
;   0  0  1  1     4      1       5
;   0  1  0  0     4      4       8
;   0  1  0  1     4      4       8
;   0  1  1  0     4      1       5
;   0  1  1  1     4      1       5
;   1  0  0  0     1      4       5
;   1  0  0  1     1      4       5
;   1  0  1  0     1      1       2
;   1  0  1  1     1      1       2
;   1  1  0  0     1      4       5
;   1  1  0  1     1      4       5
;   1  1  1  0     1      1       2
;   1  1  1  1     1      1       2


CHECKTAPS:
; Return Ninja/Shinobi Tap info
; [E] None                     
; [R] C Tap connected info 
;      7  6  5  4  3  2  1  0               
;      0  0  0  0  a1 a0 b1 b0
;
;  a[1..0], b[1..0] : Status of ports A and B 
;  1 1 No Tap detected      ( no feedback on either pin 6 or 8)
;  0 1 Ninja Tap detected   ( feedback Pin 7 = ~Pin 8 )
;  0 0 Shinobi Tap detected ( feedback Pin 7 = ~Pin 6 . ~Pin 8)
;  1 0 Unknown/unexpected   ( feedback Pin 7 = ~Pin 6 )

; --write--  ---Pin 7 (read)-----
; PIN6  PIN8 No-Tap Ninja  Shinobi Unknown
;  LOW  LOW   HIGH   HIGH   HIGH    HIGH  
;  LOW  HIGH  HIGH   LOW    LOW     HIGH    -> to bit a1/b1   First Read
;  HIGH LOW   HIGH   HIGH   LOW     LOW    -> to bit a0/b0   Second Read
;  HIGH HIGH  HIGH   LOW    LOW     LOW   (can be disregarded)
; 
CKANYTAP:
	di            ; 
	ld c,0        ; 
	; port A
	ld de,0bf3ah  ; start with Joysel port A, pins 8=1, 7=1, 6=0 (read a1)
	call FBCHECK  ; return Cy = State of pin 7
    rl  c         ; c = 0 0 0 0 0 0 0 a1
	ld de,08f0fh  ; repeat with Joysel port A, pins 8=0, 7=1, 6=1 (read a0)
	call FBCHECK  ; feedback check at pin 7
    rl  c         ; c = 0 0 0 0 0 0 a1 a0
    ; port b
	ld de,0bf7ah  ; repeat with Joysel port B, pins 8=1, 7=1, 6=0 (read b1)
	call FBCHECK  ; return Cy = State of pin 7
    rl  c         ; c = 0 0 0 0 0 a1 a0 b1
	ld de,08f4fh  ; repeat with Joysel port B, pins 8=0, 7=1, 6=1 (read b0)
	call FBCHECK  ; feedback check at pin 7
    rl  c         ; c = 0 0 0 0 a1 a0 b1 b0
    ret           ; and B = B+1

;	
; Set bits on Joystick ports and return state of pin 7
; [E]  DE => Reg 15 bit mask, D = bit clear mask, E = bit set mask 
; [R] Cy = State of pin 7
;
FBCHECK:
    call PORSEL
	LD	A,14        ; select register 14 
	OUT	(0A0H),A
	IN	A,(0A2H)    ; read state of joystick port a = x x B A R L D U
	rla             ; a =  x B A R L D U, cy = x
	rla             ; a =  B A R L D U x, cy = x
	rla             ; a =  A R L D U x x, cy = B
	ret	
	

;======================================
; Sub Routine
PORSEL:	LD	A,15
	OUT	(0A0H),A
	IN	A,(0A2H)
	AND	D          ; bit clear mask 
	OR	E          ; bit set mask
	OUT	(0A1H),A   ; return A = state of Reg15 
	RET

@Manuel
then type plug i have :
joyporta: ninjatap
joyportb:
printerport:
pcminput:
msx-midi-in:
msx-midi-out:
ninjatap_port_1:
ninjatap_port_2:
ninjatap_port_3:
ninjatap_port_4:
after typing plug ninjatap_port_1 joystick1
i see
joyporta: ninjatap
joyportb:
printerport:
pcminput:
msx-midi-in:
msx-midi-out:
ninjatap_port_1: joystick1
ninjatap_port_2:
ninjatap_port_3:
ninjatap_port_4:
but the game don't start
my xbox joystick work fine with other games then insert in joyporta