INT 21,1F - Get Pointer to Current Drive Parameter Table
(Undocumented)
AH = 1F
DL = drive number (0=default, 1=A, ...)
on return:
AL = 00 DS:BX is pointer to drive parameter table (DPT)
FF drive does not exist
DS:BX = pointer to drive parameter table (DPT) if AL=0
- the format of the DPT varies between DOS versions
- calls INT 21,32 with DL=00 for DOS version 2.x+
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