Hi!
BTW, to support BIOS access to drives >8GB you probably should implement
int13 extensions (see Rolf Brown), for example:
--------d-1342-------------------------------
INT 13 - IBM/MS INT 13 Extensions - EXTENDED READ
AH = 42h
DL = drive number
DS:SI -> disk address packet (see #0182)
Return: CF clear if successful
AH = 00h
CF set on error
AH = error code (see #0144)
disk address packet's block count field set to number of
blocks
successfully transferred
SeeAlso: AH=02h,AH=41h"INT 13 Ext",AH=43h"INT 13 Ext"
Format of disk address packet:
Offset Size Description (Table 0182)
00h BYTE 10h (size of packet)
01h BYTE reserved (0)
02h WORD number of blocks to transfer (max 007Fh for Phoenix EDD)
04h DWORD -> transfer buffer
08h QWORD starting absolute block number
(for non-LBA devices, compute as
(Cylinder*NumHeads + SelectedHead) * SectorPerTrack +
SelectedSector - 1
note that starting sector number is QWORD!
Uhus
