Hello everyone. As the title says I'm stuck with this old bootloader problem with the deary atmega2560. I've followed Nick Gammon's tutorial and it seems to burn the v2 bootloader without any problems but... I still cannot upload an 89 kb sized sketch to the board. If I cut some of the code and PROGMEM data to make the sketch fit within the 64 kb, it works just fine.
I've been looking for a solution to this for several days with no success. Is there any solution/update on this? I suspect there is but I wasn't able to find it.
Any help would be appeciated!
My board is an Arduino Mega 2560 R3 and the IDE's version is 1.8.9