DOS/32 Advanced DOS Extender - Programmer's Reference
3.08 - DOS function 32h - Get Specific Drive Parameter Block
||AH = 32h
DL = drive number
AL = 00h
DS:EBX = pointer to DPB
AL = 0FFh (invalid drive in DL)
a) The selector returned in DS register will be zero selector, ie readable/writeable data selector with Base=0. This is an internal to DOS/32 Advanced selector which may NOT be freed or modified under any circumstances.
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