Int 7F Fn 00  - Multilink Advanced V1.0+ - Enqueue System Resource         [T]

   AH = 00h
   BX = resource identifier
   AL = wait flag

Return: AL = status
       00h successful
       01h resource not available
       02h user error

Notes: the installation check consists of ensuring that the interrupt vector
     is not pointing at segment 0000h, then checking whether the byte
     at offset 0000h in the interrupt handler's segment is E9h
   function will not return until the resource is available if AL is
     nonzero on entry
   a maximum of 100 resources may be enqueued at once

See Also: AH=01h"MultiLink"