DUAL OPERATING MODE MICROPROCESSOR HAVING A RE-MAPPER UNIT

摘要

UK9-85-006 A microprocessor that has two operating modes for generating memory location addresses includes a processor 20 connected to a read-only memory 21, a random access memory 22 and an I/O unit 23 through control 25, data 26 and address 27 buses. A remapper unit 24 is connected between the processor 20 and the address bus so that when it is enabled by a signal from the I/O unit it can selectively change addresses generated by the processor and thus redirect the control of the microprocessor.