<Tr> <Th> Predecessor </Th> <Td> Commodore PET </Td> </Tr> <Tr> <Th> Successor </Th> <Td> Commodore 64 </Td> </Tr> <P> The VIC - 20 (in Germany: VC - 20; In Japan: VIC - 1001) is an 8 - bit home computer that was sold by Commodore Business Machines . The VIC - 20 was announced in 1980, roughly three years after Commodore's first personal computer, the PET . The VIC - 20 was the first computer of any description to sell one million units . </P> <P> The VIC - 20 was intended to be more economical than the PET computer . It was equipped with 5 KB of static RAM and used the same MOS 6502 CPU as the PET . The VIC - 20's video chip, the MOS Technology VIC, was a general - purpose color video chip designed by Al Charpentier in 1977 and intended for use in inexpensive display terminals and game consoles, but Commodore could not find a market for the chip . </P>

When did the commodore vic 20 come out