The Z80 Operating System with Relocatable Modules and I/O Management (Z80-RIO) is a general-purpose operating system developed by Zilog in the late 1970s for various computer systems including the Z80 Micro Computer System (MCZ-1) seriesZilog MCZ 1/20 Z80 system and the Z80 Development System (ZDS).ZDS-1 Series The MCZ systems were primarily used for software development and automation solutions.Zilog Z-80 Microcomputer System RIO was designed to facilitate the development and integration of user's programs into a production environment.Z80-RIO OPERATING SYSTEM USER'S MANUAL
