BBC BASIC for the PDP11
                         =======================
         J.G.Harston, 70 Camm Street, Walkley, Sheffield, S6 3TR
                    mdfs.net/Software/PDP11/BBCBasic
                            Date: 02-Aug-2023

This is a PDP11 implementation of the BBC BASIC programming language. It
implements BBC BASIC IV, with a few additions from BBC BASIC V.

Communication with the host system is via Unix TRAP, RT11/RSTS EMT or Tube
EMT instructions.

BBC BASIC is started with 'bbcbasic', 'RUN BASIC' or 'BASIC'. *QUIT will
return to the calling process, *HELP will report the current host interface
version.

A filename may be passed on the command line, where it is loaded and run as
though CHAINed. If the first byte of a loaded file is '#' any following
bytes up to a control character are ignored, and any following data is
loaded as untokenised program code. This allows a text file to start with,
for example:

    #! bbcbasic

On Unix you can pipe the output through a supplied 'ansi' command which will
translate output sequences to ANSI terminal control sequences, for example:

    bbcbasic | ansi

Calls to BBC MOS entries at &FF00-&FFFF are translated to appropriate host
calls. [NOP] assembles a &A0 to identify the CPU as a PDP11.