Released 1990: geoRAM is a 512 KB memory expansion for the C64 and C128 from the company Berkeley Softworks.

During the chip shortages of the 1980s, Commodore could not produce enough of its RAM Expansion Units (they eventually cancelled them). The GEOS operating system relied heavily on extra RAM, so the company behind GEOS produced their own memory expansion cartridge, called the geoRAM.

C64 – geoRAM

Remi Jakobsen


I'm collecting classic computers and video games, stretching from the 70's into the 90's. Restoration, history, usage ...


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2 thoughts on “C64 – geoRAM

  1. Husker at jeg drømte om denne, men “back in the days”, med snail-mail osv. forble den en drøm, og jeg tor ikke jeg hadde nok i ukelønn heller. Hadde en 128D (den med metall-kabinett), men kjørte for det meste GEOS 2.0 i C64-modus. PS! Digg å lese siden din. 🙂

    1. Hei, takk for det. Fordel med Geos 128 er at man også kan kjøre det i VDC modus med høyere oppløsning, om du hadde monitor for det da.

      Commodores offisielle REU ram er hakket bedre pga. MMU og hastighet på noen instruksjoner vistnok, men dette er en god erstatning.

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