====I/O ports and power supply====
[[Image:C64 Interfaces.jpg|thumb|right|300px|Commodore 64 ports (from left: Cartridge, RF-adj, RF, A/V, 488, Tape, User + Joy1, Joy2, Power)]]
[[Image:C64 models.jpg|thumb|right| C64 (top, 1982), C64C (middle, 1986) and C64G (bottom, 19871988)]]
*I/O ports: