[Coco] OS-9 compression programs. What's available?

James Jones jejones3141 at gmail.com
Thu Jul 2 23:36:57 EDT 2020

A lot depends on the data files. If they're files that are already
compressed, running a compression program on them won't help much, and
might even make things worse. If you're talking about a program that will
run on OS-9/6809, you'll either be constrained by memory. (CompuServe chose
12-bit LZW for GIF because any more bits wouldn't fit in 64K.)

On Thu, Jul 2, 2020 at 9:34 AM Robert Gault <robert.gault at att.net> wrote:

> I should know this but can't remember :)
> I need a very good OS-9 compression program that can handle two data files
> that are 559,323 and
> 5,958,126 bytes, making them fit on a floppy image. If not that, how can I
> transfer them to a PC
> file where there are several good compression programs.
> I have tried the OS-9 program AR, but that made the files larger. :(
> The files exist on .vhd images on my PC and on similar devices like the
> CoCoSDC on my real Coco3.
> Wimgtool which will transfer files from floppy images to a PC,
> unfortunately does not work with .vhd
> images.
> Robert
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