DEC BATCH-11/DOS-11

DOS-11

Developer	Digital Equipment Corporation
Written in	FOCAL,Fortran-IV,MACRO-11,TECO
Working state	Discontinued
Source model	Closed source
Initial release	1970(1970)
Latest release	V09-20C / June 1974(1974-06)
Platforms	PDP-11
Default user interface	Command-line interface
License	Proprietary

BATCH-11/DOS-11,also known simply asDOS-11,is a discontinuedoperating systembyDigital 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-11operating system.

Features

DOS-11 included:

• DOS-Monitor
• Edit-11 (text editor)
• FORTRAN IV(programming language)
• Libr-11 (librarian)
• Link-11 (linker)
• ODT-11R (debugging program)
• PAL-11R(assembler)
• PIP(file utility package)

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-11Assembler (PAL-11R in overlaid form).

The DOS-11operating systemkernel 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 systemwas distributed on (disk,DECtape,punched tapeormagnetic 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 memorysystems 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.

Legacy

DOS-11 was used to compile and install early versions of theRSTS-11andRSTS/Eoperating systemshowever it is an ancestor to theRSX-11family ofoperating systems.