The Unisystem motherboard has dip switches to configure some parameters of the game. The game can read those switches using addresses $4016 and $4017, one bit per switch. Here is a table showing which bit and address is used by each switch, where we can connect them in a NES and what they do in Super Mario VS:

Dip	Address	Bit	Connection point	Fonction
Dip 1	$4016	Bit 3	P4, pin #7	Sets the Coin/Credits ratio: 3/1, 2/1, 1/1, 1/2, 1/3, 1/4, 1/5 or free play.
Dip 2	$4016	Bit 4	P4, pin #6
Dip 3	$4017	Bit 2	U8, pin #10
Dip 4	$4017	Bit 3	P5, pin #6	New game lives. 2 or 3.
Dip 5	$4017	Bit 4	P5, pin #7	Number of coins required to obtain a new life. 100, 150, 200 or 250
Dip 6	$4017	Bit 5	Use a buffer which will be in tri-state when CPU pin #35 is not low and connect outputs to CPU pins D5, D6 and D7. I used a 74ls125 but a 74ls244, 74ls240 or 74hc368 from another NES would work too.
Dip 7	$4017	Bit 6		Timer speed. Fast or slow.
Dip 8	$4017	Bit 7		Lives after a continue. 3 or 4.

For parameters which use more than one switch, I used rotary switches. Simple diode circuits convert the rotary switch output to binary. In order to have enough space for all those switches on the front panel, I had to cut some plastic:

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