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ROM Used by Different Microprocessing Units

IP.com Disclosure Number: IPCOM000060869D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Inui, T Ishii, T Niimi, S [+details]

Abstract

This article describes a method of using a ROM (read-only memory) of the same type in a different MPU having a different programming language. It was impossible to use the same ROMs in different MPUs because each MPU had its own programming language and it could not be started by the same MPU. And when the machine had different MPUs, the program had to be written by different languages. However, if the difference between programs in different MPUs exists in program start addresses, it is possible to use ROMs of identical type commonly for loading programs for MPUs of different kinds. This procedure requires that those programs have different program start addresses or different initial instructions from each other.