One out of three Commodore 64’s during its launch were defective. Many of the early units had video problems causing a blurry effect that made alphanumeric characters difficult to read.
On address $FFF6-$FFF9 (65526-9) in the C64 KERNAL, right before the hard-coded jump vectors for the processor, you can find the letter sequence “RRBY”. These are the initials of Robert Russell and Bob Yannes, the two main engineers that created the C64.
The Commodore 64’s BASIC V2, the programming language which came built-in with the computer, can be crashed by executing PRINT""+-[x] (where x is any integer), or by attempting to create a BASIC program with an initial line number near 350800.
Due to a quirk in the C64’s BASIC operating system, an Easter egg or screensaver of sorts may be activated: Begin by pressing the RUN/STOP and RESTORE keys in unison; then enter “POKE781,96:SYS58251” on the subsequently cleared screen. The result is shown below:
In the American animated sitcom, Family Guy, on the episode Jungle Love, Peter gets his new job (at the Pawtucket Brewery) from an unemployment office worker who uses a Commodore 64.
Headkicker II: The Final Kick spoofs the Commodore 64’s startup screen, replacing the computer’s name with “Adult Swim”, a Cartoon Network line-up with The Brak Show, which the game is based off of.
Population: Tire, a game from animated flash site Homestar Runner, also starts up with a spoofed screen of the Commodore 64, called “Compydore 64.”
The Commodore 64’s startup screen was spoofed in the startup sequence of the 2002 computer/video game Grand Theft Auto: Vice City.
In the 1984 film The Philadelphia Experiment, a room full of Commodore 64 computers sitting in front of monitors is used as a control room. The computers sit unconnected by any wires or cables to anything, but Stewart Raffill, the director stated that they made a “cheap prop.”
“Weird Al” Yankovic sang about the Commodore 64 in his song “It’s All About The Pentiums.”
In one of the Police Academy films, a woman interpreting a police dispatcher follows a police car using some kind of satellite tracking device, which actually was a Commodore 64 without wires.
In the UK SciFi-Comedy TV show Red Dwarf, a number of Commodore-based computers make an appearance. In series 1 episode 5 Confidence and Paranoia, Holly the ship’s computer asks Dave Lister to erase a part of his memory by utilising a previously non-existent Commodore 64 keyboard to issue the command, subsequently rendering Holly unable to remember that he had just asked for this. In later episodes, an Amiga 500 is seen being used as another control port for the Red Dwarf ship, as well as a few more of these computers residing in a passing Holoship.
“Commodore Sixty-Four” appeared as Hobo name #175 in John Hodgman’s list of 700 Hobo Names in his book, The Areas of My Expertise.
In the 1994 film Time Chasers, the time machine is a small plane with a Commodore 64 computer inside it. When the plane took off, the date to travel to would be entered on the computer and then the plane would enter the timewarp.
In The Sierra PC game Space Quest 5, One of the planets that Roger Wilco travels to is Named “Commodore LXIV” (LXIV Being the Roman numeral equivalent of 64)
The Welsh Hip Hop group The Goldie Lookin’ Chain made references to Commodore & Spectrum computers in their hit single ‘Half Man/Half Machine’.
Wolfgang Priklopil, an Austrian communications technician who kidnapped Natascha Kampusch, used a Commodore 64 exclusively and has complicated the recovery of evidence due to its obscurity in 2006