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General Category => Applications => Topic started by: ComSoft6128 on 11:32, 22 June 20

Title: 1995 - Columbia v1.2 file compressor
Post by: ComSoft6128 on 11:32, 22 June 20
Excellent file utility from the Robot PD library.

Like AnsiTerm and DosCopy as soon as this was released the CPM equivalents were made obsolete.

See this post for an equivalent CPM utilty:
https://www.cpcwiki.eu/forum/applications/cpm-nulu-1-5-for-the-cpc-and-pcw-computers/msg188731/#msg188731 (https://www.cpcwiki.eu/forum/applications/cpm-nulu-1-5-for-the-cpc-and-pcw-computers/msg188731/#msg188731)



Using Columbia one 10K text file is compressed to 5K and, using the "multi-record" option,  twenty one various
text, BASIC and binary files (totaling 108K) are shown compressed to one 60K "library" file.

https://www.youtube.com/watch?v=CcDfZ4YuO4A (https://www.youtube.com/watch?v=CcDfZ4YuO4A)

Robot PD links:

http://www.cpcwiki.eu/index.php/Robot_PD (http://www.cpcwiki.eu/index.php/Robot_PD)

https://www.cpcwiki.eu/index.php/Columbia (https://www.cpcwiki.eu/index.php/Columbia)

https://cpcrulez.fr/auteur-richard_fairhurst.htm (https://cpcrulez.fr/auteur-richard_fairhurst.htm)

https://www.cpc-power.com/index.php?page=staff&stafftype=1&lenom=ChaRleyTroniC (https://www.cpc-power.com/index.php?page=staff&stafftype=1&lenom=ChaRleyTroniC)


Other links:

https://en.wikipedia.org/wiki/Lempel%E2%80%93Ziv%E2%80%93Welch (https://en.wikipedia.org/wiki/Lempel%E2%80%93Ziv%E2%80%93Welch)

https://en.wikipedia.org/wiki/LBR_(file_format (https://en.wikipedia.org/wiki/LBR_(file_format))

https://techtinkering.com/articles/compression-and-archiving-on-cpm/ (https://techtinkering.com/articles/compression-and-archiving-on-cpm/)

https://en.wikipedia.org/wiki/Zip_(file_format (https://en.wikipedia.org/wiki/Zip_(file_format))


Not emulated - original hardware and software

Please note the aspect ratio for this YouTube video is 16:9 but the CPC monitor
has an aspect ratio of 4:3 so you may wish to adjust your viewing device accordingly.