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| ISIS | |
|---|---|
| Developer | Intel |
| Written in | Assembler,PL/M |
| Working state | Historic |
| Source model | Closed source |
| Initial release | 1975 |
| Marketing target | exclusively forIntel Microprocessor Development System |
| Supported platforms | Intel 8080,Intel 8085 |
| Default user interface | Command line interface |
| License | Proprietary |
| Succeeded by | ISIS II |
| Official website | isis-mds.com (Archive) |
| Support status | |
| Obsolete | |
ISIS, short forIntel System Implementation Supervisor, was anoperating system for earlyIntelmicroprocessors like the8080. It was originally developed by Ken Burgett and Jim Stein under the management of Steve Hanna and Terry Opdendyk for theIntel Microprocessor Development System with two8" floppy drives, starting in 1975,[1][2][3][4][5] and later adopted as ISIS-II as the operating system for thePL/M compiler, assembler, link editor, and In-Circuit Emulator (developed by Steve Morse). The ISIS operating system was developed on an early prototype of theMDS 800 computer, the same type of hardware thatGary Kildall used to developCP/M.[5]
Communication with the user isterminal-like. Its user interface is somewhatCP/M-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)[3] 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 ofRAM, the8080/8085 CPU maximumaddress space was 64 kilobytes. In the MDS-800 and Series-II, the Monitor occupied F800h to FFFFh.Floppy disk format was 8-inch single-sided, 250 KB single-sided, single-density FM, or 500 KB single-sided, double-densityMMFM. ISIS-PDS was also software and media incompatible and unique, it came on 720 KB double-sided double-density (DSDD) 5¼-inch floppies with the Intel personal development system (iPDS-100).
TheISIS-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.
The following list ofcommands are supported by the ISIS-II console.[6]
