V1/man/man2/ilgins.2

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        11/3/71                                              SYS ILGINS (II)


NAME              ilgins -- catch illegal instruction trap

SYNOPSIS          sys ilgins; arg / ilgins = 33.; not in assembler

DESCRIPTION       ilgins allows a program to catch illegal instruction
                  traps. If arg is zero, the normal instruction trap
                  handling is done: the process is terminated and a core
                  image is produced. If arg is a location within the
                  program, control is passed to arg when the trap occurs.

                  This call is used to implement the floating point
                  simulator, which catches and interprets 11/45 floating
                  point instructions.

FILES

SEE ALSO          fptrap, the floating point package

DIAGNOSTICS

BUGS

OWNER             ken, dmr