T13/2132-D Revision 3

June 23, 2010

8.25 Return Boot Catalog (FN 4Dh)

This function returns the Boot Catalog from the CD or DVD media. See clause 7 for a description of the Boot Catalog.

Entry

 

 

 

 

 

 

AH 4Dh

 

 

 

AL

00h

 

DS:SI

Pointer to empty CD Command Packet (see table 28)

Exit

 

 

 

 

 

Carry Clear

Function completed without error

 

 

 

 

AH Shall be cleared to zero

 

Carry Set

Function completed with an error

 

 

 

 

AH Shall be set to the error code

 

 

 

 

Table 28 — CD Command Packet

 

 

 

 

 

Offset

Type

 

 

Description

0

Byte

 

8 (e.g., Packet size in bytes)

 

 

 

 

1

Byte

 

Sector count. Number of sectors in the boot catalog to transfer

 

 

 

 

2-5

DWord

 

Pointer to the buffer where the boot catalog shall be stored

 

 

 

 

6-7

Word

 

Beginning sector to transfer. This number shall be relative to the start of the boot catalog.

 

 

 

This value shall be cleared to zero to retrieve the first sector.

64

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

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Image 76
Western Digital T13/2132-D manual Return Boot Catalog FN 4Dh, CD Command Packet