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PcDiskGetDriveGeometry: Try to retrieve the extended disk geometry first.

svn path=/trunk/; revision=54505
This commit is contained in:
Eric Kohl 2011-11-27 10:00:24 +00:00
parent 320ca8654d
commit 02a1138b90
1 changed files with 13 additions and 0 deletions
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13
reactos/boot/freeldr/freeldr/arch/i386/pcdisk.c
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@ -302,12 +302,25 @@ BOOLEAN PcDiskReadLogicalSectors(UCHAR DriveNumber, ULONGLONG SectorNumber, ULON
BOOLEAN
PcDiskGetDriveGeometry(UCHAR DriveNumber, PGEOMETRY Geometry)
{
EXTENDED_GEOMETRY ExtGeometry;
REGS RegsIn;
REGS RegsOut;
ULONG Cylinders;
TRACE("DiskGetDriveGeometry()\n");
/* Try to get the extended geometry first */
ExtGeometry.Size = sizeof(EXTENDED_GEOMETRY);
if (DiskGetExtendedDriveParameters(DriveNumber, &ExtGeometry, ExtGeometry.Size))
{
Geometry->Cylinders = ExtGeometry.Cylinders;
Geometry->Heads = ExtGeometry.Heads;
Geometry->Sectors = ExtGeometry.SectorsPerTrack;
Geometry->BytesPerSector = ExtGeometry.BytesPerSector;
return TRUE;
}
/* BIOS Int 13h, function 08h - Get drive parameters
* AH = 08h
* DL = drive (bit 7 set for hard disk)