User`s guide

Serial Control 39
Serial
Control
The details of these commands are listed below. The “ H” following each
command indicates that the command bytes are in hexadecimal.
Select File
Description: This command causes the Digital Video Machine 2 to select the specified A/V
clip, sound or Playlist. Once this command is sent, the next Play command
causes the specified file to play from the beginning. The unit defaults to file #1
at power-up, unless an autoexec file exists. When receiving this command, the
Digital Video Machine 2 always looks for the file on the currently selected
drive.
Command Bytes: 43H 3uH 3vH 3wH 3xH 3yH 40H
where u corresponds to the first digit of the chapter number (or 0), v corresponds
to the second digit, w corresponds to the third digit, x corresponds to the fourth
digit and y corresponds to the fifth digit. Leading zeroes are not required.
Message Response: 0AH for each byte
Comments: This is similar to the “ Search” command in chapter addressing mode used in
Sony Laser Disc protocol. The maximum file number is 79.
Examples: Select file 76: 43H 37H 36H 40H
Select file 4: 43H 34H 40H
Play
Description: This command causes the Digital Video Machine 2 to play the file specified by
the most recent “Select File” command. The unit defaults to clip 1 at powerup if
no autoexec file exists. If a clip is stilled, this command resumes play. If this
command is issued while a Playlist is being played, the Digital Video Machine 2
will skip to the next clip in the Playlist and play it. This command sends a
response when it is executed, and another when the playback is complete.
Command bytes: 3AH
Message Response: 0AH
Completion Response: 0DH (programmable via Web Configuration)
Comments: This is similar to the “ Forward Play” command in the Sony Laser Disc protocol.
If the video material ends with a non-black screen, that picture will be displayed
until another video file is played.