June 23, 2010

T13/2132-D Revision 3

8.7 Get Drive Parameters (FN 08h)

This function shall be used to find the CHS geometry used by INT 13h functions 2, 3, and 4 to access the drive.

Entry

AH 08h

DL BIOS device number

Exit

Carry Clear Function completed without error

AH Shall be cleared to zero

BL Vendor Specific

CH Low order 8 bits of the maximum cylinder number

CL

Bit Description

7:6 high order 2 bits of the cylinder 5:0 sector number

DH

Maximum head number

DL

Total number of INT 13h devices with an INT 13h device number greater than

 

7Fh

ES:DI

Vendor Specific

Carry Set Function completed with an error

AH

Shall be set to the error code

Working Draft Enhanced Disk Drive - 4 (EDD-4)

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Western Digital T13/2132-D manual Get Drive Parameters FN 08h