X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 25 - dos 4.0/compaq dos 3.31 - absolute disk read (>32m hard-disk partitn)

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INT 25 - DOS 4.0/COMPAQ DOS 3.31 - ABSOLUTE DISK READ (>32M hard-disk partitn)
        AL = drive number (0=A, 1=B, etc)
        CX = FFFFh
        DS:BX -> disk read packet (see below)
Return: same as above
Notes:  partition is potentially >32M (and requires this form of the call) if
          bit 1 of device attribute word in device driver is set
        ORIGINAL FLAGS LEFT ON STACK! Must be popped or discarded by adj SP
SeeAlso: INT 26, INT 13/AH=02h

Format of disk read packet:
Offset  Size    Description
 00h    DWORD   sector number
 04h    WORD    number of sectors to read
 06h    DWORD   transfer address

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