Regarding the 006D distinction, I have seen this on most if not all of my Denon codes (sometimes a 006A or 006C). I am not sure where the 0067 came from???
Regarding your comments on backwards binary...
"command 101011 and the extension bit 11 is 101011 11 backards is 1110101 converted to decimal is 245."
Do you mean that 101011 11 backwards is 11110101?
Here is my corrected version without the 006D distinction. Center Level Up (C1-C6) 01000 (C6-C11) 101011 (C12-C13) 11
Preamble 0000 0076 0000 0020 System Address 000A 001B 000A 0040 000A 001B 000A 001B 000A 001B Binary Command 000A 0040 000A 001B 000A 0040 000A 001B 000A 0040 000A 0040 Extension Bit 000A 0040 000A 0040 Data Construction 000A 001B 000A 001B Lead Out 000A 0627 System Address 000A 001B 000A 0040 000A 001B 000A 001B 000A 001B Inverted Binary Command 000A 001B 000A 0040 000A 001B 000A0040 000A 001B 000A 001B Inverted Extension Bit 000A 001B 000A 001B Inverted Data Construction 000A 0040 000A 0040 Lead Out 000A 0627
