INT 16 U - PCIBM PC Tools v7+ CPSCHED/DESKTOP - INSTALLATION CHECK AX = FEEFh CX = 0000h Return: CX = ABCDh if PCIBM PC Tools scheduler (CPSCHED or DESKTOP) installed BX = segment of resident portion DX = (CPSCHED v8.0) resident CS Note: this function is identical to AX=FFD3h, and is implemented by the same code in DESKTOP SeeAlso: AX=FFEFh