A code plug is currently available from the https://www.moonraker.eu/ website – this code plug covers the entire UK Analogue and DMR Repeaters by region and VHF/UHF Analogue and DMR Simplex frequencies.
The code plug write up will contain information on the AT-D878UV’s additional function and there is also information in the radio manual.
Please remember to add in your DMR ID into the code plug before uploading to the radio – this is done under Digital / Radio ID List then for the startup display, go to Public / Optional Settings / Power On. Also note the CPS version in the code plug file name – CPS 1.26 uses Firmware 2.26 and CPS 1.27 uses Firmware 2.27
Here’s a link to a write up on this radio – http://www.k9npx.com/2018/04/how-to-build-code-plug.html