JP1 Remotes

[burchis]

[3FG]

Well, your remote (which we call a Comcast 1067BX3, with signature 3039) uses 5 digit EFCs. All UEI remotes designed in the last 2 or 3 years use 5 digit EFCs. The virtue of a 5 digit as opposed to a 3 digit EFC is that more information can be incorporated.

The EFC forms part of the information that is sent to the executor (the subroutine that actually generates the flashes of IR light). Executors also use a few bytes of "fixed data", which describe features of the IR signal which is common to all the buttons, but differs from setup code to setup code. The exact meaning of the fixed data and the EFCs varies depending on the executor. The particular executor which mdavej used in the posted upgrade is the Sony 12/15/20 bit combo. For 20 bit IR signals, it stores up to 4 sub-device numbers in the fixed data, and allows you to specify any device number and any function (OBC) number in the EFC.

So kupukai wanted to use the EFCs in mdavej's upgrade, and needed to be sure that you use a setup code which employs the 12/15/20 combo executor. He recommended 11317, since it specifies all four subdevice numbers as zero, just like mdavej's upgrade. You can use the Lookup Tool to see what fixed data each setup codes provides. Click on Protocol Search, select Comcast 1067BX3, select Sony 12/15/20 Combo, and click Search. That gives you a list of setup codes. TV 1317 (11317 to your remote) shows the desired zero subdevice numbers (which are actually labeled device in the Lookup Tool). Audio 1759 (31759) or Video 1232 (21232) would also work, but using the TV setup code means that most of the keys will work immediately, and that's easier while testing EFCs.

[burchis]

[bizwiz41]