Int 2F Fn F400  - Findirq.com - Installation Check                         [G]

   AX = F400h

Return: AL = 01h if installed
Program: FINDIRQ is a program by Rick Knoblaugh published in the 9/28/93 issue
     of PC Magazine; when run as a TSR it can determine which IRQs are
     used only when a device is active

See Also: AX=F401h