SW SuchiePai

Byte\bit	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
0	TEST	TILT1	TILT2	TILT3	-	-	-	-
1	(*1)	SERVICE	(*1)	(*1)	(*1)	(*1)	(*1)	(*1)
2	-	-	-	-	-	-	-	-
3	-	-	-	-	-	-	-	-
4	-	-	-	-	-	-	-	-

(*1) See mahjong matrix below.

mahjong matrix

output value\bit	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
0x40	A	-	E	I	M	KAN	START	-
0x20	B	-	F	J	N	REACH	-	-
0x10	C	-	G	K	CHI	RON	-	-
0x80	D	-	H	L	PON	-	-	-

JVS spec provides an example sw map for mahjong games. It maps all mahjong buttons into a sw table together. But naomi uses a different table that is quite similar way to the legacy mahjong standard harness does. As a result, you can easily create JVS to Mahjong harness bridge with wiring for inputs and quad inverters for outputs.

Only Byte 1 line is used to report buttons, but the line has different means depending on the output value to the general purpose output (kCmdDriverOutput of jvsio library). It should be on-hot value, and the value and report follows the matrix above.