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- Remove an overzealous API check and the work-around for it

svn path=/trunk/; revision=47531
This commit is contained in:
Cameron Gutman 2010-06-03 08:09:42 +00:00
parent 0f49f63b63
commit 520f691995
1 changed files with 0 additions and 21 deletions
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21
reactos/boot/freeldr/freeldr/arch/i386/pcdisk.c
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@ -279,18 +279,6 @@ static BOOLEAN PcDiskInt13ExtensionsSupported(ULONG DriveNumber)
return LastSupported; return LastSupported;
} }
// Some BIOSes report that extended disk access functions are not supported
// when booting from a CD (e.g. Phoenix BIOS v6.00PG and Insyde BIOS shipping
// with Intel Macs). Therefore we just return TRUE if we're booting from a CD -
// we can assume that all El Torito capable BIOSes support INT 13 extensions.
// We simply detect whether we're booting from CD by checking whether the drive
// number is >= 0x90. It's 0x90 on the Insyde BIOS, and 0x9F on most other BIOSes.
if (DriveNumber >= 0x90)
{
LastSupported = TRUE;
return TRUE;
}
LastDriveNumber = DriveNumber; LastDriveNumber = DriveNumber;
// IBM/MS INT 13 Extensions - INSTALLATION CHECK // IBM/MS INT 13 Extensions - INSTALLATION CHECK
@ -338,15 +326,6 @@ static BOOLEAN PcDiskInt13ExtensionsSupported(ULONG DriveNumber)
return FALSE; return FALSE;
} }
if (!(RegsOut.w.cx & 0x0001))
{
// CX = API subset support bitmap
// Bit 0, extended disk access functions (AH=42h-44h,47h,48h) supported
printf("Suspicious API subset support bitmap 0x%x on device 0x%lx\n", RegsOut.w.cx, DriveNumber);
LastSupported = FALSE;
return FALSE;
}
LastSupported = TRUE; LastSupported = TRUE;
return TRUE; return TRUE;
} }