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

[Christopher R. Hawks]

On Thu, 02 Jul 2020 15:57:58 -0300
coco at jechar.ca wrote:

> If you just want to move the images to a pc
> from os9 try creating an empty 10MB file on the
> pc naming it FORWINDOWS.DSK. Then in the coco
> emulator mount it as drive /d1 and boot to os9
> then
> 
> dmode /d1 cyl=400 sid=2
> format /d1 r "For transfers to Windows"
> 
> mount your .vhd file as /h0 in the emulator
> and copy the two files to FORWINDOWS.DSK
> os9 from Toolshed should then be able to read
> these files at least it works in linux have
> not tried the windows version of Toolshed.
> 
> On 2020-07-02 12:26, L. Curtis Boyle wrote:
> > Are these text files or binaries? Creating them under OS-9, the
> > LHA/XLH combo is probably the best, and compresses both text and
> > binaries. ZIP on a PC (based on the PKZIP 2.04g algorithm) can be
> > unzipped on a Coco/OS9 system with the UNZIP/FUNZIP combination.
> > 
> > i should mention that both LHA and UNZIP need >128K to run.
> > 
> > Sent from my iPhone
> > 
> >> On Jul 2, 2020, at 8:34 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
> >> 
> >> --
> >> Coco mailing list
> >> Coco at maltedmedia.com
> >> https://pairlist5.pair.net/mailman/listinfo/coco
> >> 
> 

    OS9 from Toolshed can read (write, copy, etc) .vhd files. At least
all the ones I've dealt with (under Linux, at least). Unless you are
referring to Micro$quat VHD files. The only windows allowed in my house
are made of glass.


Christopher R. Hawks
HAWKSoft
-- 
Revolutions are always verbose.			
	--Leon Trotsky 
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