CLD-V2600 / 2400 Level I & III • Chapter Four

4.7.4 Request Commands

 

 

 

 

31) FRAME NUMBER REQUEST

LD

 

 

Function:

The frame number which is currently being played is returned.

Format:

? F

 

 

 

 

Explanation:

Contents of the current Frame Register are returned.

 

During playback of a CAV disc, a 5-digit frame number is returned.

 

During playback of a CLV disc, a 6-digit frame number is returned.

 

(See Appendix J-1, Notes, #5, for details.) Correct values are not

 

shown if the player is not in Random Access Mode, or if the player is

 

in the lead-in or lead-out area of a disc.

 

 

As seen in the example, continuous frame numbers may not be

 

received due to timing delays between the computer and the

 

player. If a frame number code on the disc cannot be correctly

 

read, the previous value is used. An error (E04) is returned if this

 

query is sent to the player while a CD is playing.

 

Execution:

* Play Mode (CAV)

 

* Play Mode (CLV)

 

 

? F <C/R>

0 2 0 4 4 <C/R>

? F <C/R>

0 10 4 4 2<C/R>

 

? F <C/R>

0 2 0 4 5 <C/R>

? F <C/R>

0 10 4 4 6<C/R>

 

? F <C/R>

0 2 0 4 5 <C/R>

? F <C/R>

0 10 5 0 2<C/R>

 

? F <C/R>

0 2 0 4 7 <C/R>

? F <C/R>

0 10 5 0 7<C/R>

 

 

 

 

 

 

32) CHAPTER NUMBER REQUEST

LD

Function:

The chapter number which is currently being played is returned.

Format:

? C

 

Explanation:

Contents of the Chapter Number Register are returned.

 

The chapter number is a 2-digit integer (00-79). Some LaserDiscs

 

are not encoded with chapter numbers. When playing a disc

 

without chapters, an error is returned when this request is issued.

 

Correct values will not be shown if the player is not in Random

 

Access Mode, or if the player is in the lead-in or lead-out area of a

 

disc. An error (E04) is returned if this query is sent to the player

 

while a CD is playing.

 

Execution:

* Play Mode

 

 

? C <C/R>

1 2 <C/R>

CLD-V2600 / 2400 Level I & III User’s Manual TP 117 v. 2.0 • 12/93

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