supporting other MCUs,

[SaimShuja]

ESP8266-arduino-serial-programmer/src/firmware/ESPcode/UploadProtocol.cpp

Line 51 in 06d9c93

byte params[] = { 0x86, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x03, 0xff, 0xff, 0xff, 0xff, 0x00, 0x80, 0x04, 0x00, 0x00, 0x00, 0x80, 0x00 }; //current support for optiboot/atmega328p

please share references or sources of these values. I want to program other MCUs.
how can I get these values for other AVR MCUs ??.