CBM 8032 AV from Robert Henke on Vimeo.

“CBM 8032 AV is an audiovisual performance by Robert Henke, based on five Commodore CBM 8032 computers from 1980. All sound and video is generated on these machines, made possible by writing own code in machine language. The video trailer has been filmed at the Barbican Hall in London.
More info about the project here