[<<Previous Entry]
[^^Up^^]
[Next Entry>>]
[Menu]
[About The Guide]
INT 41 - SYSTEM DATA - HARD DISK 0 PARAMETER TABLE
Note: the default parameter table array is located at F000h:E401h in 100%
compatible BIOSes; the pointer may be overridden by the hard disk
controller's BIOS to support drive formats unknown to the ROM BIOS
SeeAlso: INT 1E,INT 46
Format of fixed disk parameters:
Offset Size Description
00h WORD number of cylinders
02h BYTE number of heads
03h WORD starting reduced write current cylinder (XT only, 0 for others)
05h WORD starting write precompensation cylinder number
07h BYTE maximum ECC burst length (XT only)
08h BYTE control byte
bits 0-2: drive option (XT only, 0 for others)
bit 3: set if more than 8 heads (AT and later only)
bit 4: always 0
bit 5: set if manufacturer's defect map on max cylinder+1
(AT and later only)
bit 6: disable ECC retries
bit 7: disable access retries
09h BYTE standard timeout (XT only, 0 for others)
0Ah BYTE formatting timeout (XT only, 0 for others)
0Bh BYTE timeout for checking drive (XT only, 0 for others)
0Ch WORD cylinder number of landing zone (AT and later only)
0Eh BYTE number of sectors per track (AT and later only)
0Fh BYTE reserved
See Also:
1309
This page created by ng2html v1.05, the Norton guide to HTML conversion utility.
Written by Dave Pearson