consider a system using 12 bit instructions. the machine only supports 8 instructions. each instruction can reference 1 of the machines 4 general purpose registrars, and one memory address. if the machine uses a byte addressable architecture, what is the the maximum size main memory that is practical for this system? why?

Consider a system using 12-bit instructions. The machine only supports 8 instructions (opcodes). Each instruction can reference 1 of the machine's 4 general purpose registers, and one memory address. If the machine uses a byte-addressable architecture (each byte of memory is separately addressable), what is the maximum size main memory that is practical for this system? Why