Essex BCPL for TOPS-10
Essex BCPL is the Esssex University DEC PDP-10 TOPS-10 implementation of BCPL. This is required in order to compile MUD1 from source.
COMPIL.MAC is a revised source of the DEC issued COMPILE command for DEC PDP-10 TOPS-10 Monitor 7.04 so that it recognises the BCPL file type for compilation, linking and executing. This should be compiled using EXECUTE COMPIL.MAC/SSAVE and put the EXE in the SYS: library if you intend to regularly use BCPL.
A SIMH TOPS-10 tape containing the BCPL COMPIL.EXE is in bcplcompil.tap. Restore to SYS: [1,4]
More detailed instructions for installation at https://www.quentin.org.uk/2018/02/25/installing-bcpl/