Int 61 Fn 2B  - Pc/tcp Kernel V2.02+ - "net_alarm" - Set Timed Asynchrono  [N]

   AH = 2Bh
   BX = network descriptor
   CX,DX = time before alarm in milliseconds
   DS:SI -> handler which will receive call (see #3138 at INT 61/AH=1Fh)
   ES:DI = 32-bit cookie passed to handler

Return: CF clear if successful
   CF set on error
       AX = error code (see #2990 at INT 61"FTP Software")

Notes: this function will cause a NET_AS_ALARM to be generated; it is intended
     for TSRs, etc. to regain control periodically
   this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim

See Also: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"