Dolby Laboratories DP524 - Manual (Page 32)

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Command $18: Return System Status
$FB $20 $18 0 $FD
The unit returns the following byte:
B7 B6 B5 B4 B3 B2 B1 B0
0 Dr_lock Sr_lock Test 48kHz 44.1kHz 32kHz Mute
Each bit is returned set if the associated signal is active. Dr_lock and Sr_lock are
internal signals. Dr_lock is active when the decoder has successfully locked to the
incoming RS-449 clock 'RT' : Receive Timing.
Command $19: Return System Contents
$FB $20 $19 Index $FD
This command returns a collection of strings of characters which describe the
contents of the current firmware revision including the revision of the system
control software and all of the loaded algorithms.
The 'Index' byte starts at 0 and is incremented until the unit returns a zero. On each
successive call, the unit will return the following ASCII character in the associated
null terminated string. A Linefeed character (decimal 10) separates each string.
Command $1A: Return Current Algorithm
$FB $20 $1A Index $FD
The 'Index' byte starts at 0 and is incremented until the unit returns a zero. On each
successive call, the unit will return the following ASCII character in the associated
null terminated string.
This command returns the name of the current decoder algorithm which is loaded.
Command $1B: Return Current bitrate.
$FB $20 $1B 0 $FD
This command returns a byte which describes the current decoder bit-rate. NOTE:
This data is only valid if the Dr_lock bit in 'Return System Status' byte is true.
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