hello;

can some one please tell me as to what is is the significance of
memory address register size? when we are designing an architecture
say for a 3 address-format machine with a 14 bits MAR.

What should we consider in allocating the appropriate number of bits
to the op-code, operand and general purpose register fields.

Our architecture is going to support 2000 different commands and
access 250 different general purpose registers. We are not sure how do
we calculate the total length of IR and total number of direct
addressable locations.

For 2000 instructions, our opcode is going to have 11 bits, 8 bits for
250 different registers. Total IR length would depend on our operand
size, we are not sure how to calculate that actually.

regards