HP 3000 Manuals

SPL to HP C/XL Migration Guide

MPE Commands 

Many of the MPE V commands described in Chapter 10 of the Systems 
Programming Language Reference Manual are identical to MPE XL commands.

However, the commands required to compile and run an HP C/XL program are
different in name and parameters from those used for SPL. Please consult
the HP C/XL Reference Manual Supplement for the commands and parameters
you will need.

MPE/iX 5.0 Documentation