INT 2F - Kingswood TSR INTERFACE - REMOVAL CHECK
        AH = 39h
        BL = 01h
        AL = TSR ID number (01h-FFh) (see AH=39h/BL=00h)
Return: AL = status
            00h not ready to be removed
            FFh resident module may be removed by deassigning the interrupts
                hooked by the TSR and deallocating the TSR's memory block
        AH,BX,CX,DX,ES may be destroyed
SeeAlso: AH=39h/BL=00h