This runtime system requires microcode version 11.133 or later.

This runtime system requires microcode version 11.133 or later.

Implement a new interrupt that is signalled after each GC and which
runs at roughly the same priority as character interrupts.  All GC
daemons, with the exception of the object hash daemon, run in this
interrupt handler rather than during the GC proper.  This allows GC
daemons to allocate storage and prevents GC daemons from running
during critical sections.