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Int 2F Fn DE01 U - Quarterdeck Qdpmi.sys V1.0 - Installation Check [Q]
AX = DE01h
BX = 4450h ("DP")
CX = 4D49h ("MI")
DX = 3039h ("09")
Return: AL = FFh if installed
BX = 4D42h ("MB")
CX = 4921h ("I!")
DX = 8F4Fh
ES:DI -> filename of DPMI host overlay
Note: the installation check consists of testing for the existence of the
character device QDPMI$$$
See Also: INT 2F/AX=1687h,INT 31/AX=0000h
Index: installation check;QDPMI
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