The Z80 Operating System with Relocatable Modules and I/O Management (Z80-RIO) is a general-purpose

operating system An operating system (OS) is system software that manages computer hardware and software resources, and provides common daemon (computing), services for computer programs. Time-sharing operating systems scheduler (computing), schedule tasks for ...

developed by

Zilog Zilog, Inc. is an American manufacturer of microprocessors, microcontrollers, and application-specific embedded System on a chip, system-on-chip (SoC) products. The company was founded in 1974 by Federico Faggin and Ralph Ungermann, who were soo ...

in the late 1970s for various computer systems including the ''Z80 Micro Computer System'' (MCZ-1) series and the ''Z80 Development System'' (ZDS). The MCZ systems were primarily used for software development and automation solutions. RIO was designed to facilitate the development and integration of user's programs into a production environment.Z80-RIO OPERATING SYSTEM USER'S MANUAL
/ref>

Features

The system provides a ''modest environment'' with a minimum of system support and an ''enhanced environment''. The ''modest environment'' provides a program

debugger A debugger is a computer program used to test and debug other programs (the "target" programs). Common features of debuggers include the ability to run or halt the target program using breakpoints, step through code line by line, and display ...

with file manipulation capability, a

floppy disk A floppy disk or floppy diskette (casually referred to as a floppy, a diskette, or a disk) is a type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined with a ...

driver (supporting up to eight disk drives), and a basic console driver with provision for

paper tape Five- and eight-hole wide punched paper tape Paper tape reader on the Harwell computer with a small piece of five-hole tape connected in a circle – creating a physical program loop Punched tape or perforated paper tape is a form of data st ...

operation. The ''enhanced environment'' provides access to the ''RIO Executive'' and to system support utilities such as the ''Zilog Floppy Disk File System'' (ZDOS), and the ''Zilog Hard Disk File System'' (DFS). It also provides access to a number of disk-resident software such a

text editor A text editor is a type of computer program that edits plain text. An example of such program is "notepad" software (e.g. Windows Notepad). Text editors are provided with operating systems and software development packages, and can be used to c ...

, macro assembler, and

linker Linker or linkers may refer to: Computing * Linker (computing), a computer program that takes one or more object files generated by a compiler or generated by an assembler and links them with libraries, generating an executable program or shar ...

Commands

The following list of commands are supported by Z80-RIO. * ACTIVATE * ALLOCATE * ASM * BRIEF * CAT * CLOSE * COMPARE * COPY * COPY.DISK * COPYSD * DATE * DEACTIVATE * DEALLOCATE *

DEBUG In engineering, debugging is the process of finding the root cause, workarounds, and possible fixes for bugs. For software, debugging tactics can involve interactive debugging, control flow analysis, log file analysis, monitoring at the ap ...

* DEFINE * DELETE * DISK.FORMAT * DISK.REPAIR * DISK.STATUS * DISPLAY * DO * DUMP *

ECHO In audio signal processing and acoustics, an echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is directly proportional to the distance of the reflecting surface from the source and the lis ...

* EDIT * ERROR * ERRORS * EXTRACT * FORCE * FORMAT *

HELP Help may refer to: Arts, entertainment, and media Films * Help (2010 film), ''Help'' (2010 film), a Bollywood horror film * Help (2021 theatrical film), ''Help'' (2021 theatrical film), a British psychological thriller film * Help (2021 TV ...

* IMAGE * INITIALIZE * LADT * LINK * MASTER * MEMORY *

MOVE Move or The Move may refer to: Brands and enterprises * Move (company), an American online real estate company * Move (electronics store), a defunct Australian electronics retailer * Daihatsu Move, a Japanese car * PlayStation Move, a motion ...

* PAUSE * RELEASE * RENAME * RESTORE_TABS * SAVE_TABS *

SET Set, The Set, SET or SETS may refer to: Science, technology, and mathematics Mathematics *Set (mathematics), a collection of elements *Category of sets, the category whose objects and morphisms are sets and total functions, respectively Electro ...

* STATUS * VERBOSE * XEQ

Clones

''UDOS'', a Z80-RIO compatible clone by

VEB Robotron VEB Kombinat Robotron () (or simply Robotron) was the largest East German electronics manufacturer. It was headquartered in Dresden and employed 68,000 people in 1989. Its products included personal computers, SM EVM minicomputers, the ESER m ...

, was available for a number of computers by the same company, such as the A 5120 or the PC 1715, which were based on the

U880 The U880 is an 8-bit microprocessor that was manufactured by VEB Mikroelektronik "Karl Marx" Erfurt (abbreviated as MME; part of Kombinat Mikroelektronik Erfurt) in the German Democratic Republic. Production of the U880 started in 1980 at VEB F ...

processor (the latter being a clone of Zilog's Z80). UDOS was also one of the operating systems available for the

P8000 The P8000 is a microcomputer system developed in 1987 by the Elektro-Apparate-Werke, VEB Elektro-Apparate-Werke Berlin-Treptow „Friedrich Ebert“ (EAW) in the German Democratic Republic (DDR, East Germany). It consisted of an 8-bit and a 16-bit ...

, a microcomputer system developed in 1987 by the VEB Elektro-Apparate-Werke Berlin-Treptow „Friedrich Ebert“ (EAW) in the German Democratic Republic (DDR,

East Germany East Germany, officially known as the German Democratic Republic (GDR), was a country in Central Europe from Foundation of East Germany, its formation on 7 October 1949 until German reunification, its reunification with West Germany (FRG) on ...

).P8000
/ref>

References

External links

Zilog website

Les Bird's MCZ utilities and RIO OS disk images
Discontinued operating systems Disk operating systems Microcomputer software Proprietary operating systems Z80 {{operating-system-stub

Features

Commands

Clones

See also

References

External links