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Wikipedia: DEC Batch-11
The last version | Released: V09-20C | 1974
DEC Batch-11 – an operating system created by the Digital Equipment Corporation (DEC). The first version of DOS-11 was released in 1970 and was the first operating system to run on the Digital PDP-11 minicomputer.
The PDP–11 is a series of 16-bit minicomputers sold by Digital Equipment Corporation (DEC) from 1970 into the late 1990s, one of a set of products in the Programmed Data Processor (PDP) series.
PAL-llR (Program Assembly Language for the PDP-11, Relocatable Version) operates under the Disk Operating System (DOS). PAL-llR enables you to write source (symbolic) programs using letters, numbers, and symbols which are meaningful to you. The source programs, generated either on-line using the Text Editor Edit-11, or off-line are then assembled into object modules which are processed by the PDP-11 Linker, Link-11.
Link-11 produces a load module which is loaded by the monitor command RUN for execution. Object modules may contain absolute and/or relocatable code, and separately assembled object modules may be linked with global symbols. The object module is produced after two passes through the Assembler. A complete octal/symbolic listing of the assembled program may also be obtained. This listing is especially useful for documentation and debugging purposes.