A 1900 FORTRAN post mortem dump system

This paper reports a FORTRAN post mortem dump system (PMD) for the ICL 1900 computers. The system, Jointly implemented by Birmingham and Liverpool Universities, can perform a core/storage dump In terms of the original FORTRAN source following the segment (subroutines, etc.) history of execution when the program falls to terminate successfully. The compilation overheads of the new system are very low and the execution overheads practically none.