From Arduino to a Microcontroller on a Breadboard ATmega8-internal 8MHz

I have 2 Arduino boards Duemilanove and UNO, and 6 ATMEGA8-16PU chips for my simple hobby project.
I would like to use ARDUINO borad to program bootloader and sketch on breadboard with ATMEGA8 - internal 8MHz.

I followed the tutorial “From Arduino to a Microcontroller on a Breadboard”, but could not see any support file for ATMega8 ; except it mentions ATmega168, 328.

as said:
“Download this hardware configuration archive: breadboard-1-6-x.zip, Breadboard1-5-x.zip or Breadboard1-0-x.zipdepending on which IDE you use.”

Any help/hint will be appreciated.

LeonThu

You can use GitHub - MCUdude/MiniCore: Arduino hardware package for ATmega8, ATmega48, ATmega88, ATmega168, ATmega328 and ATmega328PB