SIGEMT/SIGIOT

[John Bruner]

EMT traps on the PDP-11 occur when you execute an EMT instruction.
The EMT instruction is the same as the TRAP instruction except that
it uses a different vector.  DEC operating systems use EMT's for
system calls.

If there is no floating-point hardware, executing a floating-point
instruction will cause an *illegal instruction* trap.

The abort() library routine generates SIGIOT (except in Berkeley UNIX,
where it generates an illegal instruction trap).
-- 
  John Bruner (S-1 Project, Lawrence Livermore National Laboratory)
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