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Marko Mäkelä’s old computers: Commodore binary archive format converter cbmconvert

cbmconvert converts files related to 8-bit Commodore computers from one format to another. The program is included in the Debian GNU/Linux distribution.

In 1993, when Marko Mäkelä wrote the initial version of cbmconvert, the only way to extract files from various 8-bit Commodore file archive formats was to transfer the archive files to a 8-bit Commodore computer and to run the archiving program there. A few years later, emulators started to become more useable and other cross-platform archiving tools started to appear.

Meanwhile, the Deflate compression algorithm IETF RFC 1951 has been implemented on the 6502 microprocessor, and compressing and decompressing tools are available for the popular Zip and Gzip formats at least on some 8-bit Commodore platforms. (Some implementations are available from Pasi Ojala’s Commodore&Compression page.) cbmconvert is still relevant for converting old archive files or less commonly used native file formats, such as the Commodore tape format.

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cbmconvert Release Notes
Source code
Compiled code