NEC LCD Monitor Manual page 71

'D'-'0'(44h, 30h):D0: PROOF OF PLAY buffer reduction
'E'-'0'(45h, 30h):E0: System error
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5 "Check code" for a BCC calculation.
Delimiter
CR (0Dh): End of packet
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