Category: DESQview/TopView and Quarterdeck programs
INT 2F - 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 SeeAlso: AX=DE02h,INT 15/AX=5400h