Microprocessor, especially an 8-bit microprocessor, has an additional internal register to simplify exchanging the contents of the internal registers associated with program execution

摘要

A microprocessor has internal registers (A, X, Y), an arithmetic logic unit (ALU) and reads a program memory to execute an instruction set having a supplementary instruction for commanding the exchange of the memory or register contents. The microprocessor has an additional internal register (17) with means for exchanging the contents of the second register with the internal register. The invention also relates to a microprocessor with two additional internal registers.