CD-ROM 2.00 Interface - Drive Check

Input

 DOS1 N DOS2 N

DOS3

 Y DOS5 Y

Output

AX

 15h 0Bh  Result Code (0=Error, else OK) AX

BX

     ADADh if MSCDEX is installed BX

CX

  Drive Number (0=A)     CX

DX

         DX

ES:DI

     CF
 


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