Original SwinSID project:
http://www.swinkels.tvtom.pl/swinsid/
Eagle BRD and SCH files:
swinsid88_smd_1_1-top.brd
swinsid88_smd_1_1-top.sch
Hex file:
SwinSID88_20120524.hex
Fusebits: High: 0xDF Low: 0xE0