ISIS, short for Intel System Implementation Supervisor, is an operating system for early

Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 seri ...

microprocessor A microprocessor is a computer processor where the data processing logic and control is included on a single integrated circuit, or a small number of integrated circuits. The microprocessor contains the arithmetic, logic, and control circu ...

s like the 8080. It was originally developed by Ken Burgett and Jim Stein under the management of Steve Hanna and Terry Opdendyk for the Intel Microprocessor Development System with two 8" floppy drives, starting in 1975, and later adopted as ISIS-II as the operating system for the PL/M compiler, assembler, link editor, and In-Circuit Emulator (developed by Steve Morse). The ISIS operating system was developed on an early prototype of the MDS 800 computer, the same type of hardware that Gary Kildall used to develop CP/M.

Overview

Communication with the user is

terminal Terminal may refer to: Computing Hardware * Terminal (electronics), a device for joining electrical circuits together * Terminal (telecommunication), a device communicating over a line * Computer terminal, a set of primary input and output devic ...

-like. Its user interface is somewhat

CP/M CP/M, originally standing for Control Program/Monitor and later Control Program for Microcomputers, is a mass-market operating system created in 1974 for Intel 8080/ 85-based microcomputers by Gary Kildall of Digital Research, Inc. Initial ...

-like, even from the program interface point of view. For file opening, the program sends the name of file and gets back a handle. Each device has a name, which is entered between a pair of colons (:F0: and :F1: are floppies, :LP: is printer, etc.). Each diskette has one directory and no subdirectories. ISIS-II has been distributed as part of the Intel Microprocessor Development System and includes standard operating system commands (COPY, DELETE, DIR, RENAME, FORMAT) and debugging software (assembler, linker and debugger for external debugging in the developed device). There are two editors, one of which, AEDIT, contains editing macros support. File editing is provided directly on diskette (a .BAK file is always created). The other editor is CREDIT. ISIS-II needed at least 32 kilobytes of RAM, the 8080/8085 CPU maximum

address space In computing, an address space defines a range of discrete addresses, each of which may correspond to a network host, peripheral device, disk sector, a memory cell or other logical or physical entity. For software programs to save and retrieve st ...

was 64 kilobytes. In the MDS-800 and Series-II, the Monitor occupied F800h to FFFFh.

Floppy disk A floppy disk or floppy diskette (casually referred to as a floppy, or a diskette) is an obsolescent 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 w ...

format was 8-inch single-sided, 250 KB single-sided, single-density FM, or 500 KB single-sided, double-density MMFM. ISIS-PDS was also software and media incompatible and unique, it came on 720 KB DSDD 5¼-inch floppies with the Intel personal development system (iPDS-100). The ISIS-IV operating system was another incompatible (even with other Intel development systems) that ran on the iMDX-430 Series-IV Network Development System-II. Intel ASM80, PLM-80, BASIC-80, COBOL-80, FORTRAN-80 were all available for ISIS-II. ASM86, ASM48, ASM51 were available as well.

Commands

The following list of commands are supported by the ISIS-II console. * IDISK *

FORMAT Format may refer to: Printing and visual media * Text formatting, the typesetting of text elements * Paper formats, or paper size standards * Newspaper format, the size of the paper page Computing * File format, particular way that informatio ...

* FIXMAP *

DEBUG In computer programming and software development, debugging is the process of finding and resolving '' bugs'' (defects or problems that prevent correct operation) within computer programs, software, or systems. Debugging tactics can involve int ...

* SUBMIT * DIR *

COPY Copy may refer to: *Copying or the product of copying (including the plural "copies"); the duplication of information or an artifact **Cut, copy and paste, a method of reproducing text or other data in computing **File copying **Photocopying, a pr ...

* HDCOPY * DELETE *

RENAME Rename may refer to: * Rename (computing), rename of a file on a computer * RENAME (command), command to rename a file in various operating systems * Rename (relational algebra) In relational algebra, a rename is a unary operation written as \r ...

* ATTRIB * BINOBJ * HEXOBJ * OBJHEX * EDIT * LIB * LINK * LOCATE

References

External links

ISIS-MDS Obsolete ISIS SW, MDS HW
Retrieved 2016-11-24
Intel MDS 80 - Microcomputer Development System

ISIS II Users Guide

Intel ISIS Command-Video

Additional reverse engineered source

ISX - An ISIS-II emulator
{{DEFAULTSORT:ISIS(operating system) Intel software Microcomputer software Disk operating systems Floppy disk-based operating systems

Overview

Commands

See also

References

External links