File compression failed--good enough?

[Harry Potter]

As some of you already know, I've been working on file compression. My desire was to create a _b

[Harry Potter]

On Wednesday, January 2, 2013 10:51:45 AM UTC-5, Harry Potter wrote:
> As some of you already know, I've been working on file compression. My desire was to create a _b

Sorry about the fragment--I accidently pressed the wrong key. As I was saying:

As some of you already know, I've been working on file compression. My desire was to create a _better_ file compression technique. On a DOS-based PC, I was only able to approach the deflate technique. I was wondering, is this good enough for 8-bit systems? If so, I have plans.

[Groepaz]

deflate is okish, the current "state of the art" packers are exomizer, byte
boozer and pucrunch. (and there is source to unpack deflate on the c64 in
cc65s library, btw)

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<Thomas Danko>

[Payton Byrd]

I think you should create file compression that uses the quantum states of the 6510 based on the heat generated by a 64C running with the head shield removed in a 72F room on the Winter Solstice.

[Harry Potter]

On Wednesday, January 2, 2013 2:21:43 PM UTC-5, Groepaz wrote:
> Harry Potter wrote: > On Wednesday, January 2, 2013 10:51:45 AM UTC-5, Harry Potter wrote: >> As some of you already know, I've been working on file compression. My >> desire was to create a _b > > Sorry about the fragment--I accidently pressed the wrong key. As I was > saying: > > As some of you already know, I've been working on file compression. My > desire was to create a _better_ file compression technique. On a > DOS-based PC, I was only able to approach the deflate technique. I was > wondering, is this good enough for 8-bit systems? If so, I have plans. deflate is okish, the current "state of the art" packers are exomizer, byte boozer and pucrunch. (and there is source to unpack deflate on the c64 in cc65s library, btw) -- http://www.hitmen-console.org http://magicdisk.untergrund.net http://www.pokefinder.org http://ftp.pokefinder.org I usually get drunk on Mondays, Wednesdays, Fridays and Saturdays... <Thomas Danko>

I have cc65 and exomizer, but I want to create my own, *better* technique. I refuse to ask for help with it, as in my mind this is my project. Also, as I said, I have plans for it, and those plans involve developing a better technique.

[Groepaz]

lol. good luck. i'd still recommend looking at exomizer instead, that way
you'd atleast end up with a working decruncher =)

--

http://www.hitmen-console.org http://magicdisk.untergrund.net
http://www.pokefinder.org http://ftp.pokefinder.org

I'm honored to shake the hand of a brave Iraqi citizen who had his hand cut
off by Saddam Hussein.
<George W. Bush>

[Errol Smith]

Yes, deflate is good enough and we have it already.

There are at least 3 different implementations of deflate decompressors
on the c64 already - mine, Pasi Ojala's and the one in the cc65 library.
All of them are published with source code.
There is even a c64 based compressor (Pasi's). (Though nobody who is
serious about compression on the c64 would actually use it for
compressing, that is all done on a PC now)
So you are completely wasting your time with deflate.
Besides, deflate is not really appropriate for most c64 applications as
it has huge memory requirements and only gets efficient with large files
of 32k+.

If you wanted serious compression you would be looking at lzma/lzma2 etc
as a START, but that is not useful for the c64 anyway (LZMA has a
minimum window of 64k which rules out the c64 instantly).

If you are talking about file > memory decompressors that is a separate
issue and that has already been done to death with modern
crunchers/packers designed from the ground up for the c64 as mentioned
by Groepaz. They don't have the resource requirements of deflate for the
decompressor.

[s1]

On Jan 2, 4:07 pm, Payton Byrd <plb...@gmail.com> wrote:

> I think you should create file compression that uses the quantum states of the 6510 based on the heat generated by a 64C running with the head shield removed in a 72F room on the Winter Solstice.

I wish there were someone like that around to do it.

[Harry Potter]

I am working on my own technique, for 8-, 16- and 32-bit systems, not on the deflate technique. The technique is IMO not good enough. I was just wondering if okay is good enough for 8-bit computers. If it is, I might implement it now.