Bil Herd worked for Commodore as a hardware designer. He worked on the C16, 116, Plus4 and later on the C128 and the C64 LCD. Bil is searching through his personal archive and is scanning drawings from Commodore designs. You can now look at the CPM cartridge for the VIC20, original TED drawings and a 80 column cartridge for the C64.
Website: http://c128.com
Source: http://www.richardlagendijk.nl