CD-ROM SCSI-2 COMMAND REFERENCE MANUAL VERSION 3.1 (OB-U0077C)

TABLE 2-26 READ HEADER (44H)

 

 

 

 

 

Bit

 

 

 

Byte

7

6

5

4

3

2

1

0

0

 

 

 

Operation Code (44h)

 

 

 

1

 

Logical Unit No.

 

 

Reserved

 

MSF

Reserve

2

 

 

 

Logical block address (MSB)

 

 

 

3

 

 

 

Logical block address

 

 

 

4

 

 

 

Logical block address

 

 

 

5

 

 

 

Logical block address (LSB)

 

 

 

6

 

 

 

 

Reserved

 

 

 

7

 

 

 

Allocation Length (MSB)

 

 

 

8

 

 

 

Allocation Length (LSB)

 

 

 

9

 

 

 

 

Reserved

 

 

 

TABLE 2-26A HEADER DATA FORMAT

 

 

 

 

 

Bit

 

 

 

Byte

7

6

5

4

3

2

1

0

0

 

 

 

CD-ROM Data Mode

 

 

 

1

 

 

 

 

Reserved

 

 

 

2

 

 

 

 

Reserved

 

 

 

3

 

 

 

 

Reserved

 

 

 

4

 

 

Absolute CD-ROM Address (MSB)

 

 

5

 

 

 

Absolute CD-ROM Address

 

 

 

6

 

 

 

Absolute CD-ROM Address

 

 

 

7

 

 

Absolute CD-ROM Address (LSB)

 

 

TABLE 2-26B CD-ROM DATA MODE CODES

CD-ROM Mode

User Data Field Contents (2048

Auxiliary Field Contents (288

 

Bytes)

Bytes)

00

all bytes zero

all bytes zero

01

user data

EDC, L-EC bytes

02

user data

user data

03h ~ FFh

reserved

reserved

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