CD-ROM Capabilities and Mechanical Status Page

TABLE 2-9-7A PARAMETER DESCRIPTION (CONTINUED)

Bit

Parameter

 

 

 

 

 

Description

19

Eject Command

The drive can eject the disc via the normal START/STOP command

 

 

with the LoEj bit set.

 

 

 

23 ~ 21

Loading Mechanism Type

This field specifies the type of disc loading the drive supports.

 

 

23

 

22

 

21

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

0

 

0

 

Caddy type loading mechanism

 

 

 

 

 

 

 

 

 

 

 

0

 

0

 

1

 

Tray type loading mechanism

 

 

 

 

 

 

 

 

 

 

 

0

 

1

 

0

 

Pop-up type loading mechanism

 

 

 

 

 

 

 

 

 

 

 

0

 

1

 

1

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

1

 

X

 

X

 

Reserved

 

 

 

 

 

 

24

Separate Volume Levels

The audio level for each channel can be controlled independently.

24

Separate Channel Mute

The mute

capability for each channel can be controlled

 

 

independently.

 

 

 

TABLE 2-9-7B EXAMPLE DATA RATES

Speed

Data Rate

X1

176 Kbytes / second

X2

353 Kbytes / second

X2.2

387 Kbytes / second

X3

528 Kbytes / second

X4

706 Kbytes/second

The Maximum Speed Supported field indicates the actual maximum data rate that the drive supports. This value is returned as the number of kilobytes per/second (Speed/1000) that the data is read from the drive.

Note that these are the raw data rates and do not reflect any overhead resulting from headers, error correction data, etc. It is also important to understand that the reported data rate is a theoretical maximum and the actual data rates to the host will be lower.

The Number of Volume Levels Supported field returns the number of discrete levels. If the drive only supports turning audio on and off, the Number of Volume Levels field shall be set to 2.

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