START/STOP (CD-ROM mode)

1Bh

START/STOP is executed for 1Bh when the drive is in CD-ROM mode. When out of CD-ROM mode, the LOAD/UNLOAD command, which shares the opcode, is executed.

Assuming that the pre-execution checks are passed, GOOD status is always reported.

Pre-execution checks:

Illegal Field

Flag Link

Bad LUN

Reservation

Deferred Error

Unit Attention

Command descriptor block:

 

 

7

6

5

4

 

3

2

1

0

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

Operation

Code (1Bh)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

Logical Unit Number

 

 

 

Reserved (0)

 

Immed

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

Reserved (0)

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

Reserved (0)

 

 

LoEj

Start

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CDB fields:

Immed This flag is ignored.

LoEj Load/Eject. This flag is ignored.

Start This flag is ignored.

Commands

START/STOP (CD-ROM mode) 1Bh 175