Q. Define the Register Length?
Register Length:Asignificant characteristic related to registers is length of a register. Generally the length of a register is dependent on its use. For illustration a register that is used to calculate address should be long enough to hold maximum possible addresses. If size of memory is 1 MB than a minimum of 20 bits are needed to store an instruction address.
In the same way the length of data register must be long enough to hold data type it is supposed to hold. In many cases two consecutive registers can be used to hold data whose length is double of the register length.