Int 16 Fn D724  U - Apcal V3.20 - Get ???                                  [U]

   AX = D724h
   CX = 00CBh

Return: AX = 0000h
   BX = 0000h
   DX:CX -> ??? or 0000h:0000h
Program: APCAL is an optionally-resident shareware appointment calendar by
     Gamma Software

See Also: AX=3577h,AX=D724h/CX=00CCh,AX=D724h/CX=00CDh