...
Notes
A badly formed block is likely to crash the machine. The routine does not check the vality of the alarm block.
Related calls
GN_Aab, allocate alarm block
GN_Alp, process an expired alarm (internal OZ usage)
GN_Fab, free alarm block
GN_Uab, unlink an alarm block from the alarm chain
OS_Alm, alarm manipulation (internal OZ usage)