What happens to existing codes after writing to remote

[Ken]

When a remote is new it comes pre-programed. If I add a device lets say to the SAT of the remote, what happens to all the existing codes available to the SAT ? Does the new code and it's hex values delete all the other codes?

I was just curious for example if I no longer need the new device I have programed into the remote would I have access to the pre-programmed codes or are they gone now?

Next question, If I have a 8810 that might be 3 or 4 years old, would a new one have more codes available and could I clone it to the older one? If this is the case would anyone have a new 8810 they might have saved all the data as is, prior to programming and it make it available for download.

I mention this because ONE FOR ALL gave me a couple codes for my remote to try however they didn't work and said I could have them upgrade it. Maybe the latest 8810s already have these new codes. I already did the upgrade for the 2 Devices via JP1 but would like to know if a new 8810 has them preprogrammed.

thanks,

Ken

[The Robman]

All the built in codes are in what we call the ROM (Read Only Memory), any upgrades that you might add get written to the EEPROM (Erasable Programmable Read Only Memory) which is a totally seperate chip. So, no, adding codes to the EEPROM does not delete them from the ROM.

As for a new version of a remote having more codes, this does sometimes happen but when it does the new version of the remote will have a different revision number (eg, URC-8811B01 vs. URC-8811B00) and will usually have a different signature, which means IR.exe will recognise it as a different remote. There is only one version of the URC-8810/URC-8811 so they all have the same built in code library.

As a JP1 user, you usually don't care what codes are built in as you will typically add upgrades for all of your devices. You say that OFA gave you a couple of codes to try, do I take it from this that you are unsuccessfully trying to program the URC-8810 to work a couple of your devices? Have you checked the file section to see if we have upgrades available for any of these devices? Remember, you usually don't need to find an exact match on the model number as an upgrade for a similar model will usually work. Do you still have the original remotes for any of these devices? If so, given that the URC-8810 is a learning remote, you can use it to capture the signals and then build your own upgrades.

Finally, if neither of those options work, you can post the setup code numbers that OFA asked you to try and we can see if we have data for them that might help you.

[classicsat]

The only thing you have to worry about is the code you may assign to an upgrade being used for a stock code, and wanting to use the stock code later, which you can assign the upgrade to a different code or delete it when it is not needed.

For a later revision of a remote that has new codes, they are fixed in the rom and you cannot copy them to the older one. However if you get the same revision you have and send it in for an upgrade, you can copy that over.

[Ken]

The ROM vs. eeprom told me what I needed to know.

Yes I was successful upgrading the remote my self with a files
I found on this site.

Is this exactly the same thing the mfg would have done for my
8810 ?

Thanks for you help,

Ken

All the built in codes are in what we call the ROM (Read Only Memory), any upgrades that you might add get written to the EEPROM (Erasable Programmable Read Only Memory) which is a totally seperate chip. So, no, adding codes to the EEPROM does not delete them from the ROM.

As for a new version of a remote having more codes, this does sometimes happen but when it does the new version of the remote will have a different revision number (eg, URC-8811B01 vs. URC-8811B00) and will usually have a different signature, which means IR.exe will recognise it as a different remote. There is only one version of the URC-8810/URC-8811 so they all have the same built in code library.

As a JP1 user, you usually don't care what codes are built in as you will typically add upgrades for all of your devices. You say that OFA gave you a couple of codes to try, do I take it from this that you are unsuccessfully trying to program the URC-8810 to work a couple of your devices? Have you checked the file section to see if we have upgrades available for any of these devices? Remember, you usually don't need to find an exact match on the model number as an upgrade for a similar model will usually work. Do you still have the original remotes for any of these devices? If so, given that the URC-8810 is a learning remote, you can use it to capture the signals and then build your own upgrades.

Finally, if neither of those options work, you can post the setup code numbers that OFA asked you to try and we can see if we have data for them that might help you.

[classicsat]

I'd be surprised if they are using hobbyist JP1 resources to upgrade customer remotes.

More than likely they have their own database of upgrades they source from OEM remotes or equipment manufacturers, and their own upgrade software/hardware

[mr_d_p_gumby]

Is this exactly the same thing the mfg would have done for my8810 ?

No and Yes. They would add an upgrade to the EEPROM, just as is done with the JP1 tools (but using their own tools). However, the mapping of functions to buttons that they provide is usually a compromise predicated on trying to satisfy requirements of more than one model of equipment. It's more likely that a JP1 upgrade will have the set of functions needed by a specific model, and, with the JP1 tools available, you can always rearrange things to your liking and add any missing functions.