Hello, I'm trying to do the controller mod here: N64 Stick Converter PCB v3 / firmware v3.5 - PCBs available again (August 2017)
Basically you solder an ATtiny24a microcontroller onto a circuit board. Then you program the microcontroller with a USBasp AVR programmer... somehow. From the link:
"After you've assembled the PCB you still need to program the microcontroller with program code provided inside the archive. The N64 Stick Converter PCB got a standard 6-pin ISP interface for programming the microcontroller. Use the .hex and .eep to program both the flash memory and the EEPROM of the microcontroller. Also stick to the fuse byte settings provided inside the archive."
I know pretty much nothing about arduino, so now I'm completely lost. It looks like most people put the microcontroller on a breadboard and plug the programmer into that, but I've already soldered it onto the circuit board. And then after that I don't know how to put the files onto the microcontroller.
I know people who claim to have done this mod but they won't tell me, so I thought I would ask here. Apologies if this is the wrong forum or something. Thanks for your help.