Int 10 Fn CBFF  - Unchain - Installation Check                             [V]

   AX = CBFFh

Return: AX = CCBBh if installed
Program: UNCHAIN is a TSR by Colin Buckley which permits use of Borland
     development tools with Mode X video in the absence of a second
     monitor

See Also: AX=CB00h,AX=CB01h,AX=CB06h