> Which means you could have a valid implementation with anything from a 4-bit unsigned char to a 256 bit or larger signed char This is not quite accurate; the

> Which means you could have a valid implementation with anything from a 4-bit unsigned char to a 256 bit or larger signed char This is not quite accurate; there is no upper limit to the number of bits in a char (except for INTMAX_MAX, perhaps), but it cannot have any fewer than 8 bits, including a possible sign bit.