Chapter Three • CLD-V2800 Level III

33) TIME NUMBER REQUEST LD (CLV Only) & CD

Function:

The time number indicating the current disc address is returned

 

when a CLV LaserDisc or when a CD is played.

Format:

? T

 

Explanation:

Contents of the current Time Register are returned.

 

When a CLV disc is being played, time numbers are contained in the

 

Frame Register. Time numbers encoded on most discs manufactured

 

since the early 80’s consist of extended time numbers: hour, minutes,

 

seconds, and frames. The CLD-V2800 will access the hours, minutes

 

and seconds encoded on the disc. Older discs may only be encoded

 

with hours and minutes. When a disc not encoded with seconds is

 

played, the seconds unit is fixed to 0. (To determine CLV time

 

number frame values on discs encoded with hours, minutes, seconds

 

and frame numbers, send a ?F to the player. See page 3-31, Frame

 

Set, also Appendix E-1, Notes.)

 

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. If a time number on the disc cannot be correctly read, the

 

previous number is used. When a CD is played, the player returns

 

a four digit number minutes (00-99) and seconds (00-59). A single

 

side of a CD contains a maximum of 74 minutes of playing time.

Execution #1:

* Play Mode, CLV LaserDisc playing

(LD’s)

? T <C/R>

0 3 2 1 3 <C/R>

 

(0 hour, 32 minutes, 13 seconds)

Execution #2:

* Play Mode, CD playing

(CD’s)

? T <C/R>

0 3 2 1 <C/R>

 

(3 minutes, 21 seconds)

34) TRACK NUMBER REQUEST

CD

Function:

The track number which is currently being played is returned.

Format:

? R

 

Explanation:

Contents of the Track Number Register are returned.

 

The track number is a 2-digit integer. 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 LaserDisc is playing.

Execution:

* Play Mode, Track 12 of a CD is playing

 

? R <C/R>

1 2 <C/R>

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TP 120 v. 1.0 • 10/95 CLD-V2800 Level III User’s Manual