3.7.4 Request Commands |
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31) FRAME NUMBER REQUEST | LD |
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Function: | The frame number which is currently being played is returned. | ||||
Format: | ? F |
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Explanation: | Contents of the current Frame Register are returned. | ||||
| During playback of a CAV disc, a | ||||
| During playback of a CLV disc, a | ||||
| (See Appendix | ||||
| if the player is not in Random Access Mode, or if the player is in the | ||||
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| 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. |
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Execution: | * Play Mode (CAV) |
| * Play Mode (CLV) | ||
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| ? F <C/R> | 0 2 0 4 4 <C/R> | ? F <C/R> | 0 010442<C/R> | |
| ? F <C/R> | 0 2 0 4 5 <C/R> | ? F <C/R> | 0 010446<C/R> | |
| ? F <C/R> | 0 2 0 4 5 <C/R> | ? F <C/R> | 0 010502<C/R> | |
| ? F <C/R> | 0 2 0 4 7 <C/R> | ? F <C/R> | 0 010507<C/R> | |
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32) CHAPTER NUMBER REQUEST | LD | |
Function: | The chapter number which is currently being played is returned. | |
Format: | ? C |
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Explanation: | Contents of the Chapter Number Register are returned. | |
| The chapter number is a | |
| 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 | |
| disc. An error (E04) is returned if this query is sent to the player | |
| while a CD is playing. |
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Execution: | * Play Mode |
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| ? C <C/R> | 1 2 <C/R> |