Int 67 Fn 00  - Pc-net, Alloy Ntnx - Lock Semaphore And Wait               [N]

   AH = 00h
   DS:DX -> ASCIZ semaphore name (max 64 bytes)

Return: AL = status (see #3193)
   AH = semaphore owner if status=02h

See Also: AH=01h,AH=02h"PC-NET",INT 7F/AH=00h

(Table 3193)
Values for PC-NET semaphore function status:
 00h   successful
 01h   invalid function
 02h   semaphore already locked
 03h   unable to lock semaphore
 04h   semaphore space exhausted