INT 13H (0x13)
Function 19H (0x19 or 25) >> Park heads
Call with: AH = 19H
DL = drive
80H-FFH fixed disk
Returns: If function successful
Carry flag = clear
AH = 00H
If function unsuccessful
Carry flag = set
AH = status
Comments:
This function moves the read/write arm to a track that is not used for data storage, so that data will not be damaged when the drive is turned off.
INT 13H (0x13)
Function 1AH (0x1A or 26) >> Format ESDI drive
Call with: AH = 1AH
AL = Relative Block Address (RBA)
defect table count
0, if no RBA table
>0, if RBA table used
CL = format modifier bits
Bit(s) |
Significance (if set) |
0 |
Ignore primary defect map |
1 |
Ignore secondary defect map |
2 |
Update secondary defect map |
3 |
Perform extended surface analysis |
4 |
Generate periodic interrupt |
5-7 |
Reserved (must be 0) |
DL = drive
80H-FFH fixed disk
ES: BX = segment: offset of RBA table
Returns: If function successful
Carry flag = clear
AH = 00H
If function unsuccessful
Carry flag = set
AH = status (see INT 13H Function 01H)
Comments:
This function initialize disk sector and track address fields on a drive attached to the ESDI Fixed Disk Drive Adapter.
The operation of this function is called a low level format and prepares the disk for physical read/write operations at the sector level. The drive must be subsequently partitioned with the FDISK command and then given a high level format with the FORMAT command to install a file system.
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