Int 2F/AX=DE00h/BX=4456h

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DESQview v2.26+ External Device Interface - INSTALLATION CHECK

AX = DE00h
BX = 4456h ("DV")
CX = 5844h ("XD")
DX = 4931h ("I1")

Return:
AL = FFh if installed (even if other registers do not match) if BX,CX, and DX were as specified on entry, BX = 4845h ("HE") CX = 5245h ("RE") DX = 4456h ("DV")

Range:
AH=C0h to AH=FFh, selected by scanning AH=DEh-FFh, then AH=C0h-DDh

Note: The XDI handler should not issue any DOS or BIOS calls, nor should it issue DESQview API calls other than those allowed from hardware ints

See Also: AX=DE02h - INT 15/AX=5400h

Category: DESQview/TopView and Quarterdeck Programs - Int 2Fh - D

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