Int 16 Fn FEF1 U - PC Tools V7 Only Cpsched/desktop - Alternate Installa [U] AX = FEF1h BX = ??? Return: CX = 5555h if PC Tools scheduler (CPSCHED or DESKTOP) installed DX = 5555h Note: this function is identical to AX=FFD3h, and is implemented by the same code in DESKTOP See Also: AX=FFF1h