Retro Thing: Emulating The Commodore 64's Sound Chip
The differences between SID Chips : r/c64
COMMODORE 64 /128 SID SWINSID CHIP SID MOS 6581 & 8580 REPLACEMENT X-SID BOOST | eBay
Vintage Commodore 64 SID Synthesizers: Reborn on PCI (Mac/PC) - CDM Create Digital Music
SID - C64-Wiki
Commodore 64 (C64) SID Repair - YouTube
Stereo to C64 with DualSID | ilesj's blog
The SIDFX Sound Mod – breadbox64.com
MJK's Commodore Hardware Overview: Commodore 64
The one page BASIC SID Benchmark.
Driving the SID chip: Assembly Language, Composition, and Sound Design for the C64 « G|A|M|E
RGCD: Sid Chip Club Available on Cartridge! (Commodore 64)
Commodore 64 SID Chip Type 6581 or 8580 - Etsy
SID chip analysis
Chip Hall of Fame: MOS Technology 6581 - IEEE Spectrum
How to identify C64 and SID model | ilesj's blog
SID - C64-Wiki
linusakesson.net
Switch Your SID Up! – OSH Park
C-64 Workshop / Chips
BackSID™ (6581/8580 SID replacement) – BackBit
MOS Technology 6581 - Wikipedia
Chip Hall of Fame: MOS Technology 6581 - IEEE Spectrum
Commodore 64 (C64) Rare 6581 SID Repair - YouTube
C64 SID Chip Replacement
