File:C64 ASSY NO 250425 motherboard 1984.jpg - Wikimedia Commons
Clone-a-Dore: C64 Micro ATX Replacement Motherboard – Vintage is The New Old
PetterHans on Twitter: "Cloning of the C64 KU Motherboard done. Layout and Schematics done, but not Design Rules Checked yet. Been quite exhausting project. https://t.co/UhAv63DbVg" / Twitter
Ants, Dirt, Rain, And The Commodore 64 That Wouldn't Quit | Hackaday
Commodore 64 (1982) | Oldcomputr.com
commodore:c64:assy-250425 [Support Wiki]
Commodore 64 motherboard revisions - The Silicon Underground