Int 16 Fn 5453  - Tsrbones - Installation Check                            [t]

   AX = 5453h ('TS')
   BX = 5242h ('RB')
   CX = 4F4Eh ('ON')
   DX = 4553h ('ES')

Return: AX = 4553h if installed
   BX = 4F4Eh if installed
   CX = 5242h if installed
   DX = 5453h if installed
Program: TSRBONES is a skeletal TSR framework by Robert Curtis Davis

Note:  these values are the default as the TSRBONES package is distributed,
     but will normally be changed when implementing an actual TSR with
     the TSRBONES skeleton

See Also: INT 2D/AL=00h"AMIS"