Computer Control
3.3Command and Status
During normal operation, when a computer transmits commands to a DVD- V8000, the player responds with the status message, ‘execution complete’.
Example
COMPUTER | ⇒ | |||
(1) | “Search to Frame 1000” | (2) | Search Execution | |
|
| ⇐ | (3) | Complete |
(4) | “Play to Frame 2000” | ⇒ | (5) | Play Execution |
|
| ⇐ | (6) | Complete |
NOTE: The length of a command string is limited to 32 characters. Please refer to COMMAND STRUCTURE for additional information.
When using a computer to control the
•ASCII characters are used for actual commands and status response
•Command mnemonic is expressed as two (2) ASCII characters
•Uppercase letters are recommended; however, usually there are no distinctions between the uppercase and lowercase letters
•Some commands require an argument (e.g. Chapter number or speed)
•Use a command as the terminator of an argument
The player executes a command as soon as the carriage return <CR> is received. The <CR> acts as the command line terminator.
Example
CH<CR> | : | Set Chapter for address mode |
10SE<CR> | : | Search to Chapter 10 |
The player has a command buffer, which stores a command string of up to 32 characters in length.
Example
10SE 20PL<CR> : Search to Chapter 10 then play to 20
The command string enters the buffer with the first character and continues sequentially from left to right. When the <CR> is entered, the commands are executed sequentially beginning with the first command in the buffer. In the example above, the first command is 10SE.
NOTE: The player ignores codes in the command string such as <SPACE>
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