Int 16 Fn 6969  - Pc Tools V5.1+ Backtalk - Installation Check             [U]

   AX = 6969h
   BX = 6969h
   DX = 0000h

Return: DX nonzero if installed
       BX = CS of resident code
       DX = PSP segment of resident code
       DS:SI -> ASCIZ identification string "CPoint Talk"