マイコンボードの選択
MPU : atmega8 内臓クロック 8MHz のとき ==> [Opti] ATmega8s8MHz
中身はこれです。
atmega8s8.name=[Opti] ATmega8s8MHz
atmega8s8.upload.protocol=arduino
atmega8s8.upload.maximum_size=7680
atmega8s8.upload.speed=38400
atmega8s8.bootloader.low_fuses=0x94
atmega8s8.bootloader.high_fuses=0xDC
atmega8s8.bootloader.path=optiboot
atmega8s8.bootloader.file=optiboot_atmega8s8m.hex
atmega8s8.bootloader.unlock_bits=0x3F
atmega8s8.bootloader.lock_bits=0x0F
atmega8s8.build.mcu=atmega8
atmega8s8.build.f_cpu=8000000L
atmega8s8.build.core=arduino
atmega8s8.build.variant=RCduino