INT 2F - FINDIRQ.COM - INSTALLATION CHECK AX = F400h Return: AL = 01h if installed Program: FINDIRQ is a program by Rick Knoblaugh published in the 9/28/93 issue of PCIBM PC Magazine; when run as a TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user. The name comes from the name of the DOS function call used to remain in memory after termination. it can determine which IRQs are used only when a device is active SeeAlso: AX=F401h