With IDE 1.8.13, using Tools->Board: Arduino NG or older and then selecting Processor ATmega8 it is easy to install Bootloader and upload sketches to an ATmega8 equipped with a 16 MHz quartz.
I also managed to add a boards.txt to upload on ATmega328 without Crystals.
Actually, I was looking for a way to handle an ATmega8 without using a quartz.
There is a tutorial:
which works out of the box using IDE version 1.0.5-r2.
If I try to use these instructions with 1.8.13 I still can install the bootloader, but cannot upload sketches.
So I could be happy using 1.0.5, but I would prefer to run it using 1.8.13.
Can somebody tell me what changes I have to make for 1.8.13?