function reads a sector or sectors from disk into memory parameter block format for PC/AT and PS/2 fixed disks INT 13H (0x13) Function 0A H (0x0A or 10) Read sector long

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The parameter block format for PC/AT and PS/2 fixed disks is as follows:

Byte(s)

Contents

00H_01H

maximum number of cylinders

02H

maximum number of heads

03H-04H

Reserved

05H-06H

starting write pre compensation cylinder

07H

maximum ECC burst length

08H

Drive options


Bit(s)

Significance (if set)

0 – 2

not used

3

more than 8 heads

4

not used

5

manufacturer’s defect map present at
maximum cylinder +1

6 – 8

nonzero (10, 01,or 11) if retries disabled

09H-0BH

Reserved

0CH-0DH

landing zone cylinder

0EH

sector per track

0FH

Reserved


INT 13H (0x13)

Function 0A H (0x0A or 10) >> Read sector long

Call with: AH = 0AH
AL = number of sectors
CH = cylinder
CL = sector
DH = head
DL = drive
80H-FFH fixed disk
ES: BX = segment: offset of buffer


Returns:If function successful
Carry flag = clear
AH = 00H
AL = number of sectors transferred

If function unsuccessful
Carry flag = set
AH = status

Comments:
This function reads a sector or sectors from disk into memory along with a 4 byte Error Correcting Code (ECC) code for each sector. Unlike the normal Read sector function (INT 13H (0x13) Function 02H), ECC errors are not automatically corrected. Multi sector transfers are terminated after any sector with a read error.

Sample Chapters from book DATA RECOVERY WITH AND WITHOUT PROGRAMMING by Author Tarun Tyagi
Data Recovery with & without Programming


Publishers of the Book
Number of Pages
ISBN
Price of the Book


BPB Publications, New Delhi, India
540
81-7656-922-4
$69.00 (Including Shipping Charges, Cost of Book and Other expenses, Free Source Code CD included with the Book)





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