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CREATING THE COMMODORE 64: THE ENGINEERS’ STORY
https://spectrum.ieee.org/commodore-64#toggle-gdpr
 
IN JANUARY 1981, a handful of semiconductor engineers at MOS Technology in West Chester, Pa., a subsidiary of Commodore International Ltd., began designing a graphics chip and a sound chip to sell to whoever wanted to make “the world’s best video game.”
 
Instead, he decided, the chips would go into a 64-kilobyte home computer to be introduced at the Consumer Electronics Show in Las Vegas the second week of January 1982. The computer had yet to be designed, but that was easily remedied.
 
“We looked heavily into the Mattel Intellivision,” recalls Winterble.
The MOS designers freely borrowed ideas that they liked—sprites from the TI machine, collision-detection techniques and character-mapped graphics from the Intellivision, and a bit map from their own VIC-20. They then packed as many of those ideas as they could into a predefined area of silicon.
 
In November 1981, the chips were complete. The original intent had been a game machine, but at this point the personal-computer market was beginning to look promising.
 
in fact also a problem
 
But when the Commodore 64 was conceived, it was to be primarily a game machine, not a computer.