This is in onedrive, and usually edited and compiled directly on McPit. (Laptop works now too!) Also, committed to something GitHub as /McPit-DCS-BIOS
To program, update the device ID, set the serial port in arduino software, build and then press the button on the target device.
Note: There are build warnings about something like PRR being defined twice. Doesn't seem to matter.
"EMERG" "0x0488"
"FUEL" "0x0489"
"NMSP" "0x0490"
"KY58" "0x0491"
"UHF" "0x0492"
"VHFFM" "0x0493"
"IFF" "0x0495"
"Caution" "0x0496"
"TCN_ILS" "0x0497"