Hi!
>About these compression methods:
>It's too bad that (to my knowledge) there's not a single compression
>method for MSX machines, for which:
>a) Both compressor and de-compressor exist
>b) Which are essentially bug-free
>c) Can handle about every (un)packing job
Any archive format (ZIP/ARJ/PMA/LZH) or best ratio. ?
Heh.. sounds like a dream...... (for an MSX user...)
>
>PMA: PMarc sometimes produces .PMA files which produce checksum
>errors on unpacking, even though they're freshly packed (!), and both
>PMarc & Pmext round up file sizes to multiples of 128 bytes (due to
>their CP/M origin).
>Mostly not that big a problem, but not quite correct, and does cause
>problems in some cases.
>And...using .PMA files on PC's is very difficult.
Maybe someone could contact the guy who coded it once? or dzassemble
it... It was done at least once by the guys (I guess so), who coded the
backup program HDR.COM/HDB.COM that first used .pma compression and then
saved files directly to disk (not files).... As far I remember it was
DOS2 compatible and could even work with directories. Who made it BTW?
>
>LHA: I'd say the best (un)packing method that exists for the MSX
>today, but....also has a bug: if files to be (un)packed get really
>big (> 1MB or so), packer or unpacker screws up....
>(Can someone fix this bug?)
Which packer/unpacker are you talking about?
[LHPACK.COM]PACKER for MSX-DOS2 (LHPACK V1.03 by KYOJU '95)
[LHEXT.COM] UNPACKER for MSX-DOS2 (LHEXT V1.33 by KYOJU '95)
[LHARC.COM] + [LHARC.OVL] + [LHARC.HLP] LHARC V1.02 by Y. TAGAWA
1989-1990 (Adapted from UNIX for MSX2 with MSX-DOS2 by Uwe S.) - This
one requires MSX-DOS2 and is able to
extract/pack with path names (slow but OK).
>
>ARJ: There does exists an ARJ unpacker for MSX, but....no packing
>program.
>
>ZIP: Yes! Forget about packing, but it sure would be nice if someone
>would write a -decent- ZIP unpacking program for the MSX. Say, PKZIP
>2.04 compatible, and with support for unpacking directory trees
>stored in ZIP's.
>
The only working is the UNZIP217.COM for DOS2, but it can�t decompress
deflated files.
>For this purpose:
>There exists something called the Info-ZIP group, which is kind of a
>'collective' (hobbyists like most of you) that maintains a freely
>distributable ZIP packer/unpacker.
>Goal of this group is to have a free ZIP (un)packer on as many
>different systems/platforms as possible (existing versions support
>all current ZIP features).
>I don't know an exact web-address where this can be found, but:
>both the ZIP packer, unpacker, and ALL source-code should be
>available on SimTel. I guess you should be able to find that.
>(look in the DOS collection, and maybe in some "programming"
>directory).
>Maybe sometime the MSX system can be added to the list of supported
>platforms?
Yup, a zip (compressor)/uncompressor for MSX would be a nice thing :-)
Greets from Gabriel
[EMAIL PROTECTED]
http://www.geocities.com/SiliconValley/Vista/2653/
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