ASSIGN - Get Installation State                        

Input

DOS1 N DOS2 N

DOS3

Y DOS5 Y

Output

AX

06h 00h   Install Flag AX

BX

        BX

CX

        CX

DX

        DX

ES:DI

    CF
Install Flag:   00h = Not installed, OK to install
                01h = Not installed, not OK to install
                FFh = Installed


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