Interesting....

Spotted by accident, and I've not been able to reproduce it et

The "Get playback status" command returns a previously unobserved value,
0xff 0x24, when the unit is stopped but flushing changes out to the TOC
(at least I assume that's what it's doing - it makes a short "seeking"
type of noise after it's been sat for a while after changes have been 
made).

Pete.