INT 16 - TSRBONES - INSTALLATION CHECK
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
SeeAlso: INT 2D/AL=00h"AMIS"