Sony HVO-500MD Protocol Manual page 8

3. Completion of an operation is informed by this device to Host
This device will return a response after the execution of each following command: EJECT, MEMORY
SEARCH, INDEX SCAN FWD, REPEAT etc.
Command
A3H
Host
Response
This device
There exist 3 responses from this device, which are COMPLETE, NOT TARGET, TRAY OPEN.
COMPLETE.......to be returned when a command is executed and ended normally.
NOT TARGET...to be returned when a specified target is not found.
TRAY OPEN .....to be returned when the disc tray is open.
4. Each command is basically 1-byte long, but there are some which are the combinations
of 2 different commands
Extended
command
Host
This device
Notes
1) Before receiving a response from this device, you shouldn't send any other command. However, if there
is no response from this device for more than two sec. after sending a command, it is necessary to take
some measures because the transmission could have not been done correctly.
2) No other command can be inserted between an extended command and a secondary command.
Multi-byte setting commands
When specifying multi-byte setting commands, if even a single byte is defined incorrectly or cannot be
received, the entire command and all its settings will be ignored.
8
Response
0AH 03H
Completion of
operation
Secondary
command
D8H 9AH
Response Response
0AH 0AH
HVO-500MD/550MD