Arduino on ATmega and ATtiny

ATmega8 optiboot
supplies : 16Mhz crystal 1EA, 10K ohm resistance 1EA, 18pF or 22pF ceramic condenser 2EA
atmega8o.upload.speed=115200 → atmega8o.upload.speed=19200 / boards.txt

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ATtiny13 optiboot
attiny13.build.f_cpu=9600000L → attiny13.build.f_cpu=10000000L / boards.txt

#if defined(__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) || (__AVR_ATtiny13__) // add to hardware/arduino/cores/arduino/wiring.c
SIGNAL(TIM0_OVF_vect)
#else
SIGNAL(TIMER0_OVF_vect)
#endif

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