Int 7F Fn 24  - Alloy Ntnx - Attach/release Host Processor                 [N]

   AH = 24h
   CL = function
       02h attach host
       03h release host

Return: AX = status
       00h successful
       01h invalid request
       02h already attached
       03h not attached
       04h lock table full

Note:  the host processor may be attached in order to perform I/O via the host