README.md

SwinSID nano

Replacement board for the legendary SID soundchip of the Commodore C64 based on the design by Swinkels.

An AVR programmer is required to flash the firmware. A cheap and reliable programmer is e.g. USBasp.

Connect the programmer to the PC via USB and to the ICSP header on the board via an ICSP cable.
Make sure you have installed avrdude.
Open a terminal.
Navigate to the software folder with the hex-files.

Execute the following commands one after the other (if necessary replace "usbasp" with the programmer you use):

avrdude -c usbasp -p m88p -U flash:w:SwinSID88_20120524.hex
avrdude -c usbasp -p m88p -U lfuse:w:0xe0:m -U hfuse:w:0xdf:m

Set the jumpers on the board according to the SID IC version that is to be emulated (6581 or 8580).
Open your switched off C64 and put the SwinSID nano into the IC socket provided for the SID. Pay attention to the correct orientation!
Close your C64 and switch it on.
Load a game and enjoy the unmatched sound.