C/H/S from user space

From: linux-os (Dick Johnson)
Date: Fri Feb 17 2006 - 12:00:14 EST




For those who think that C/H/S translation is useful,
attached is a simple program that gets whatever the BIOS
used from user-space. If you have large media (most do),
you will descover that C/H/S is useless because it is
always set to "MAX" like this:

Disk parameter table(s) at vector 0x41
Disk0
Cylinders = 1024
Sectors = 63
Heads = 255
Write precomp = 0
Landing zone = 65296
Reserved bit 0 set
Reserved bit 1 set
Reserved bit 2 set
More than 8 heads
Reserved bit 4 set
Defect map present
Disable retries
Disable retries
Disk1
Cylinders = 306
Sectors = 1
Heads = 4
Write precomp = 0
Landing zone = 12544
Disk parameter table(s) at vector 0x46
Disk0
Cylinders = 306
Sectors = 1
Heads = 4
Write precomp = 0
Landing zone = 12544
Disk1
Cylinders = 306
Sectors = 1
Heads = 4
Write precomp = 0
Landing zone = 12544


Cheers,
Dick Johnson
Penguin : Linux version 2.6.15.4 on an i686 machine (5589.55 BogoMips).
Warning : 98.36% of all statistics are fiction.
_



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Attachment: CHS.tar.gz
Description: CHS.tar.gz