Int 1A Fn 9F  - Pcmcia Socket Services V2.1 - Get/set Prior Int 1a Handle  [X]

   AH = 9Fh
   AL = adapter number
   BL = mode
       00h get prior INT 1Ah handler
       01h set prior INT 1Ah handler
       CX:DX -> new prior handler

Return: CF clear if successful
       AH destroyed
       CX:DX -> old prior handler
   CF set on error
       AH = error code (01h,15h,18h) (see #0580)
Desc:  allows hooking of INT 16h "behind" the Socket Services hook

Note:  this API is supported by recent versions of the AMI BIOS

See Also: AH=9Eh,AH=A0h"PCMCIA",AH=AEh"PCMCIA"