Acorn Cassette Operating System - COS

"This is a 2K byte program providing support for other programs by dealing with peripherals and allowing programs to be filed on cassette tape. It supports Acorn's Teletext VDU, a parallel ASCII keyboard and a Centronics style parallel printer via a VIB."

(VIB refers to the Versatile Interface Board)

Source code (ca65 format)

Listing file

Object code

Manual (see chapter 6)

 

Oracle Microsystems COS

Whilst a student in the early 1980's I produced my own add-on for the System 2 COS:

Source code (ca65 format)

Listing file

Object code (2K extension only)

Object code (4K COS+ extension)

Manual (to follow)

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