Based on "AvrUsb500 by Petka" project ( https://swordgreenline.narod.ru/PetkaAvrUsb.html ), STK500v2 compatible.

. hex for ATmega - https://www.mindrunway.ru/Pony/Petka_AvrUSB500HEX_SRC_v6_uni.zip




. hex for ATmega - https://www.mindrunway.ru/Pony/Petka_AvrUSB500HEX_SRC_v6_uni.zip