>> I am interested in building a "selector" gadget for devices that take
>> jumpers
>> to select a program, such as this game cartridge where you have 5
>> jumpers
>> to select program #0-31 (the jumpers represent the binary number):
>
>
>
>Why don't you just use a rotary switch which opens and closes four
>outputs. You can get binary coded decimal or hexadecimal - if you use
>a hex switch your users have to understand the the sequence
>0,1,2,3,4,5,6,7,8,9,A,B.D,E,F.