Then there is EBCDIC....
Some machine still do BCD math!? (1806, 8080, 8085. z80).
Its how the logic is organized as a BCD computer was done (several times)
but from a logic reduction standpoint a binary math solution is few gates
to get the task done.
IF we ignore that than any number system is doable.
That's also factored from the 70s where I did control interface logic for
a 8 channel tape deck that had three level logic!? If that hurts, consider
that a spindle?has a clutch that can be forward, reverse or tension, or
brake that was?on, off, or drag.? Really!? So Trinary logic of levels had
to be reduced to a two bit code.
Allison
