This directory includes Edinburgh's backup.s, slightly modified
at the Vrije Universiteit by Johan Stevenson.
To find out what's going on - read the comments in backup.s.
Note that the new backup code fiddles with the stack-pointer
passed to grow() in trap.c. This variable MUST be stored in
external variable 'backsp'.
The file 'fix_to_trap' gives the necessary modifications.

The directory 'test' contains several test programs for the
new backup routine.
