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| DOS-11 | |
|---|---|
| Developer | Digital Equipment Corporation |
| Written in | FOCAL,Fortran-IV,MACRO-11,TECO |
| Working state | Discontinued |
| Source model | Closed source |
| Initial release | 1970; 55 years ago (1970) |
| Latest release | V09-20C / June 1974; 51 years ago (1974-06) |
| Supported platforms | PDP-11 |
| Default user interface | Command-line interface |
| License | Proprietary |
BATCH-11/DOS-11,[1][2][3][4] also known simply asDOS-11, is a discontinuedoperating system byDigital Equipment Corporation (DEC) ofMaynard,Massachusetts. The first version of DOS-11 (V08-02) was released in 1970 and was the first operating system to run on the DigitalPDP-11minicomputer. DOS-11 was not known to be easy to use even in its day and became much less used in 1973 with the release of theRT-11 operating system.
DOS-11 included:[5]
DOS-11 came withXXDP, a diagnostics and monitor program for the PDP-11. Like other Digital operating systems, DOS-11 also had a FORTRAN-IV (Ansi-66)compiler. FORTRAN-IV was not supported on PDP-11 systems with less than 12K of memory. DOS-11 systems running in 8K and 12K configurations ran a limited version of theMACRO-11 Assembler (PAL-11R in overlaid form).
The DOS-11operating system kernel was one file called MONLIB.LCL. The LCL extension was the acronym for LInked Core Image Library (or LICIL). An LICIL could be stored on any type of media that the DOS-11operating system was distributed on (disk,DECtape,punched tape ormagnetic tape). When the LICIL file was installed (Hooked) onto a disk drive as a contiguous file, the monitor library name is changed to MONLIBCIL which could then be booted. The CIL extension was the acronym for Core Image Library. Core, was the term for thecore memory systems common to the PDP-11. A Core Image Library could be created with the CILUS (Core Image Library Update and Save) program. A MONLIBCIL typically contained theresident monitor (RMON), the keyboard command routine, device drivers, EMT routines, the clock routines and the transient monitor.
DOS-11 was used to compile and install early versions of theRSTS-11 andRSTS/Eoperating systems however it is an ancestor to theRSX-11 family ofoperating systems.[citation needed]
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