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<1234567…34>
  • z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…

    ... use these things as a compression/decompression layer so you could ... , chrust and bitbuster basically uses LZ compression which assumes that all previous ...
    Fikee Fikee October 2005 Development
  • z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…

    ... , chrust and bitbuster basically uses LZ compression which assumes that all previous ... 't looked into what these compression utils are doing yet. I ... to use, choosing between max compression and max flexibility. Personally I ...
    Alcoholics Anonymous Alcoholics Anonymous October 2005 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... the brand new MegaLZ for LZ compression. The former, of course, ... to do the actual compression. Pucrunch was successfully used ...
    The problem with LZ compression is that the size of ... determines the degree of compression achieved, since the decompresser ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • Z80 compressorIs there one available? Is it any good? Peeps have been suggesting we should look into this, so here's a new thread! I'd do the compressor on the …

    ... sec.) and especially compression were not priorities. ... The pmc compression algorithm first applies an LZ compression routine where ... the LZ compression part. Second, the LZ and ... byte encoding algorithms interact with each other improving compression ...
    Paolo Ferraris Paolo Ferraris May 2010 Development
  • New tool: ZXBOOT.EXE[B]ASM[/B] is proud to present the first release of ZXBOOT.EXE: [url]http://www.4shared.com/file/NP-FVOSf/zxboot__beta_.html[/url] ZXBOOT is a comma…

    ... =Metalbrain;492970]The compression used was a complex LZ routine, allowing great ... compression rates[/QUOTE]

    I don't use LZ compression as I need to make ...
    ASM ASM November 2010 Announcements
  • Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …

    ... block, and finally do the LZ compression.

    As Einar said ... ...), hence the need for effective compression.

    There is one ...
    utz utz May 2013 Development
  • Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …

    ... block, and finally do the LZ compression.[/QUOTE]
    Do not bother ... no added benefit. Appropriately tuned LZ is just as effective at ...
    introspec introspec May 2013 Development
  • Porting Blues Brothers CPC->ZX...just an ideaI've just watched a video of the CPC version of the Blues Brothers games by Titus [url]http://www.youtube.com/watch?v=6DOj-Ta3Ek4...Based[/url] on th…

    ... to 1.489 bytes using LZ compression, so - assuming that the other ...
    Sokurah Sokurah June 2014 New game ideas
  • ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…

    ... document how to implement optimal LZ compression for years but I never ...
    Einar Saukas Einar Saukas May 2017 Development
  • ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…

    ... document how to implement optimal LZ compression for years but I never ...
    TomD TomD May 2017 Development
  • ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…

    ... document how to implement optimal LZ compression for years but I never ...
    gp2000 gp2000 May 2017 Development
  • ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…

    ... document how to implement optimal LZ compression for years but I never ...
    Einar Saukas Einar Saukas May 2017 Development
  • New compression method: Exomizer 2After I finished working on optimizing aPLib's decoder, I was told that pucrunch did compress better, and while looking for info about pucrunch (it t…

    ... that clearly beats both on compression: exomizer 2.

    [url ...
    Metalbrain Metalbrain December 2007 Development
  • Simple text compressionI just checked one idea about text compression. Do not take it as recomendation but rather as info which can you save some time when you are solving …

    ... checked one idea about text compression. Do not take it as ... idea:
    Need for text compression which compress well short messages ...
    Fikee Fikee May 2009 Development
  • packers / crunchers and general compressionI'm just curious where I would find such things, coming from a c64 background also , there is shedloads. I mean the obvious things like crunchers fo…

    ... maps, char packers etc also.. compression in general and perhaps things ...
    fog fog November 2009 Development
  • Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …

    ... have a large buffer for compression - max. 768 bytes could be ... ideas how to achieve better compression under these circumstances? Speed is ...
    utz utz May 2013 Development
  • Grammar-based data compressionI'm working on a game for the 48k Spectrum but want a way to compress a lot of screens into a small space, so I'm looking into data compression. Each…

    ... I'm looking into data compression. Each screen is an currently ... on a fast PC so compression space/time is not that ...
    i love the z80s i love the z80s May 2015 Development
  • Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …

    ... did some comparisons of different compression methods. To make this relevant ... , also used 7z with ultra compression level; it has a large ...
    Sol_HSA Sol_HSA January 2016 Development
  • Incompressible blocksOne idea I've been pondering about regarding Mackarel is incompressible blocks. If you have a game where you store some data in memory in compressed …

    ... stuff doesn't benefit from compression - especially if you're storing ... data - it's possible that LZ finds similarities between the compressed ... data, and check how the compression ratio changes. Compressor is zx7 ...
    Sol_HSA Sol_HSA January 2016 Development
  • Text compression methodsI once typed in a Text compressor from INPUT magazine, it worked on a first and second most common following letters algorythm and reduced the binary…

    ... . one could get around 40% compression.

    I was thinking ... an average of over 50% compression be acheived. Of course I ...
    dmsmith dmsmith September 2022 Sinclair Basic
  • Run Length DecodingRun length encoding/decoding is far less efficient than using a modern compression program.

    ... is advanced compression method than RLE but compression ratio depends ... for 6912 nulls). generally, LZ will be good at ... combination of RLE and statistical compression.
    Documentation for ... some clever looking messages about compression in this forum :)
    Fikee Fikee March 2006 Development
  • Which packer is the best?Hello folks, we are currently preparing an update to our Disk-Magazine SCENE+. However, looks like more and more coder groups in the Spectrum-Scene d…

    ... The problem is that compression is VERY expensive in ... For example, the common LZ algorithm repeatedly search for patterns ... wait several hours until compression finishes) and coder do ... problem with decompressor as compression and decompression are asymetric ...
    Fikee Fikee March 2008 Development
  • Which packer is the best?Hello folks, we are currently preparing an update to our Disk-Magazine SCENE+. However, looks like more and more coder groups in the Spectrum-Scene d…

    ... produces the best results for compression on speccy, i've seen ... i was aware of PMC(LZ with huffman backend). does ZXRAR ...
    Fikee Fikee March 2008 Development
  • RLE source codeI'm considering tweaking my Des Des loader to cope with on the fly decompression (yeah I'm bored) I was wondering if anybody out there had a very ba…

    ... have a couple of RLE compression routines kicking around. from the ... basic byte wise LZ has same speed and has better compression ratio.
    Fikee Fikee March 2009 Development
  • RLE source codeI'm considering tweaking my Des Des loader to cope with on the fly decompression (yeah I'm bored) I was wondering if anybody out there had a very ba…

    [QUOTE=Fikee;343920]dont bother with RLE, a basic byte wise LZ has same speed and has better compression ratio.[/QUOTE]

    I don't know much (read anything) about LZ but as I want to decompress while loading from tape RLE seemed like the best bet
    Kilby Kilby April 2009 Development
  • Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …

    ... http://www.sfu.ca/~vwchu/compression.html[/url] (warning: ... one of the usual spectrum compression utilities?

    ... The usual spectrum compressors are lz variants which can only decompress ... access nature of huffman compression better for really tight ...
    Alcoholics Anonymous Alcoholics Anonymous January 2010 Development
  • Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …

    ... ]
    Do you use a compression for tile graphics ? While level ... to use RLE or perhaps LZ to compress it) the biggest ... hard to say if LZ could manage significant compression ratio.
    i ... based arithmetic decoder already but compression is not as good as ...
    Fikee Fikee February 2010 Development
  • Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …

    ... hard to say if LZ could manage significant compression ratio. [/QUOTE]
    compression will pack it about half ...
    Fikee Fikee February 2010 Development
  • Z80 compressorIs there one available? Is it any good? Peeps have been suggesting we should look into this, so here's a new thread! I'd do the compressor on the …

    ... reducing offset length (basically statiscal compression of offsets). Both do ... by Paolo Ferraris, it is LZ backed by Huffman (well, ... minigame compo and has amazing compression ratio and very compact ... kind compressor which would use LZ (with some tweaks like ...
    Fikee Fikee February 2010 Development
  • Z80 compressorIs there one available? Is it any good? Peeps have been suggesting we should look into this, so here's a new thread! I'd do the compressor on the …

    ... 've read a bit about compression and Huffman coding. I'm ... of bits? Or is this LZ rather than Huffman?
    joefish joefish February 2010 Development
<1234567…34>

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  • Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway.<br /> <b…
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