Hi,
2011/1/26 Rugxulo <rugx...@gmail.com>:
> Hi,
>
> On 1/25/11, Roy Tam <roy...@gmail.com> wrote:
>>
>> 2011/1/26 Eric Auer <e.a...@jpberlin.de>:
>>>
>> Thanks for your information! I did use 7-zip heavily in the past and
>> now I'd give advzip a try.
>
> AdvZip (and AdvDef, etc.) use 7-Zip's improved Deflate verbatim from
> the (now old 4.42) LZMA SDK. I'm not entirely sure, I forget (and
> haven't really looked closely anyways), but it does several things:
> strip comments, remove "extra info", and recompress the actual Deflate
> data (no EOS needed??). The last "full" (w/ srcs) FPC DOS .ZIP I tried
> it on, it saved like 2 MB !! TP55 itself was (badly-compressed) into <
> 1 MB, if you need any proof that it saves enough for "useful" things.
> And keep in mind that Gzip and Zip both default to (I think) -6, not
> -9 (optimal), similarly 7-Zip (-mx5).
>
>>> Maybe Roy tried to use it to unzip some text to the screen
>>> or to unzip some files to a ramdisk in a tiny DOS floppy?
>>> Which other tiny unzippers would you suggest here, Rugxulo?
>>
>> As netbootdisk.com boot disk nature, it consists of 2-pass
>> decompression. First, it decompress unuharcd.exe and command.com to
>> RDISK-created ramdisk with INSTALL= in config.sys, point SHELL= to
>> COMMAND.COM in ramdisk, and unuharc the network drivers
>> archive(FILES.UHA) in autoexec.bat.
>
> Just speaking from my own floppy experiences, UHARC is nice but slow
> and RAM greedy (at least compared to 7-Zip). I ended up preferring
> 7zdecode from LZMA SDK, which is also a much smaller .EXE:
>
> http://sites.google.com/site/rugxulo/7zdec912.zip?attredirects=0
>
> Okay, so I know you didn't really make this bootdisk, but still, just
> FYI .... You might actually find out that .7z compresses better too.
>
I did test both UHARC and 7-Zip with netbootdisk.com files. I unUharc
the files in FILES.UHA and repack(without directory) with 7-Zip .7z
format and optimized with ultra7z, but the 7z archive is still bigger
of 65288 bytes(1,226,766 bytes vs 1,161,478 bytes).
>> At the beginning I even found that TUNZ give no output in INSTALL=
>> line, but now I recrate it with a brand new floppy and it seems to be
>> fine.
>
> I hate to say it, but perhaps floppies (and associated drives) really
> are unreliable. I just wish USB was easier to use and hence easy to
> retrofit support for various other ("legacy", ugh) OSes. Instead, they
> only target the big three as well as making sure that not all BIOSes
> can boot from it (lazy). Oh well, unavoidable, I just hate "progress"
> that really means "regress". :-(
>
Yes floppies are unreliable. But for those machines that can't boot
from USB, floppies are the only method to boot (CD is not a choice
because the contents need to be update seasonally).
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