This block diagram of the C64 bases on the Commodore "Service Manual C64/C64C, PN-314001-03 from March 1992", Page 3. The shown diagram was redrawn, the mistakes were corrected and the functions were refined. The Color RAM was missing, the RAM was called ROM.
<a href="//commons.wikimedia.org/wiki/User:Sven.petersen" title="User:Sven.petersen">Sven.petersen</a>
<span class="int-own-work" lang="en">Own work</span>