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Search Again :: Adv Search 610 results in 0.001s
<1234567…21>
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... ]screen file| size | ZX7 |RCS+ZX7|Joe+ZX7|Pre+ZX7|Pre+Joe|Joe+ |Pre ... +Joe+|Joe |Pre+Joe
    | | | | | | +ZX7 |MegaLZ|+MegaLZ|Exomizer|Exomizer|+gzip |+gzip
    Einar Saukas Einar Saukas January 2013 Development
  • MegaLZ unpacking problemEverytime I try to unpack something with MegaLZ's build in decompressor (using the -d option), the second half of the data is corrupted. The Z80-base…

    Everytime I try to unpack something with MegaLZ's build in decompressor (using the -d option), the second half of the data is corrupted. The Z80-based decompressor unpacks it as expected. Any idea if it is my fault or there is a bug in MegaLZ?
    LCD LCD December 2012 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... new compression algorithm for [B]"ZX7"[/B] that is "optimal" ( ... br />

    [*] The [B]"ZX7"[/B] decompressor for the ZX ... br /> Notice however that [B]"ZX7"[/B] uses LZ77 compression only ... packer probably means that [B]"ZX7"[/B] should work better than ...
    Einar Saukas Einar Saukas December 2012 Brand new software
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... size for several screens using ZX7 compressor, with and without reordering ... /> [CODE]screen file| size | ZX7 |RCS+ZX7
    -----------+------+-------+-------
    Cobra.scr | 6912 ... screen files obtained from both MegaLZ benchmarks and [URL="http://zx ...
    Einar Saukas Einar Saukas January 2013 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... make it work:

    zx7.h , line 42:
    [code ... *output_size);
    [/code]

    zx7.c , line 107:
    [code ... to be that optimal... using MegaLZ's benchmark test, I get ... ]121942 bytes for zx7[/B]
    118341 bytes for MegaLZ
    117791 ...
    Metalbrain Metalbrain December 2012 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... /> [CODE]
    |New MegaLZ
    | |Old MegaLZ
    | | |PuCrunch
    | | | |ZX7
    | | | | |Bitbuster ...
    Einar Saukas Einar Saukas December 2012 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... just for fun I tried ZX7 with a ZX-7 binary ... Binary: 5838 bytes
    ZX7: 1646
    (New) MegaLZ: 1669
    Bitbuster ... 's usually hard to beat MegaLZ, so that deserves an extra ...
    utz utz December 2012 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... just for fun I tried ZX7 with a ZX-7 binary ... Binary: 5838 bytes
    ZX7: 1646
    (New) MegaLZ: 1669
    Bitbuster ... 's usually hard to beat MegaLZ, so that deserves an extra ... a lot of coincidence that ZX7 seems especially useful for compressing ...
    Einar Saukas Einar Saukas January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... to 2452 bytes for ZX7. With decompression routine its ... />
    The ZX7 standard decompressor is 69 bytes ... from both the MegaLZ benchmark and from the ZX7 demo:
    ZX7 |RCS+ZX7
    -----------+------+------+-------
    scrh-1 ...
    Einar Saukas Einar Saukas January 2013 Brand new software
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... ;675078]Retro-X and MegaLZ packed the Cobra Screen to ... without)
    Phase 3:
    MegaLZ packing (1734 bytes)
    [/QUOTE ... />
    I just tested MegaLZ against ZX7 using the [url=https://dl ... scr onto scr2orcs.exe).
    MegaLZ packed original RCS = 1729 ...
    FrankT FrankT January 2013 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... /> [*]Lerm CC1: 37067 bytes
    [*]ZX7: 26399 bytes (without decompression routine ... ,400 bytes
    [*]ZX7: 26,323 bytes
    [*]MegaLZ: 24,954 bytes ...
    [/list]
    ZX7 with the ...
    FrankT FrankT January 2013 Brand new software
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... =LCD;675078]Retro-X and MegaLZ packed the Cobra Screen to ... without)
    Phase 3:
    MegaLZ packing (1734 bytes)

    ZX7, it will reduce Cobra.scr ...
    Einar Saukas Einar Saukas January 2013 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ,400 bytes
    [*]ZX7: 26,323 bytes
    [*]MegaLZ: 24,954 bytes ...
    [/list][/QUOTE]

    Makes sense. ZX7 ... files.

    Even so, ZX7 should still be a good ...
    Einar Saukas Einar Saukas January 2013 Brand new software
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... taken from the official MegaLZ benchmark package. Since MegaLZ home page is ... not even close to RCS+ZX7 results. We would need close ...
    Einar Saukas Einar Saukas January 2013 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... want that BorIDE will support ZX7 compression in the future too ... the next sub version. Currently MegaLZ, Exomizer and ApLib (Apack) are ...
    LCD LCD March 2013 Brand new software
  • Assembler v Machine CodeHi. I've been looking at a lot of the code examples in the Development section and can see that Assembler is the way to go. However, I was wondering …

    ... new Spectrum game using BIFROST*, ZX7, RCS, Rotatrix, and Fontrix. These ... , I would simply have used MegaLZ in this game without thinking ...
    Einar Saukas Einar Saukas March 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 …

    ... as sources (I already mentioned megalz and zx7). They may be a ...
    introspec introspec 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 …

    ... say that MegaLZ usually performs best, not to mention ZX7 :-) So LZ77 ...
    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 …

    ... say that MegaLZ usually performs best, not to mention ZX7 :-) So ... Z80 compressor for Exomizer, MegaLZ, and ZX7 would not be practical. There ... same compressed data format as ZX7, so you will be able ... to use ZX7 decompressor (which is smaller and ...
    Einar Saukas Einar Saukas May 2013 Development
  • new game - R2-D2 (Exam)i'm glad to announce new Russian game for ZX Spectrum 48/128 by [I]Alexey Kashkarov (kas29)[/I] - [B]R2-D2 (Exam)[/B]: [IMG]http://i48.fastpic.ru/bi…

    ... as well. I switched from MegaLZ to zx7. 69 bytes decompressor.
    FrankT FrankT June 2013 Games
  • new game - R2-D2 (Exam)i'm glad to announce new Russian game for ZX Spectrum 48/128 by [I]Alexey Kashkarov (kas29)[/I] - [B]R2-D2 (Exam)[/B]: [IMG]http://i48.fastpic.ru/bi…

    ... switched from MegaLZ to zx7. 69 bytes decompressor.[/QUOTE]
    ZX7 is a ...
    Alessandro Grussu Alessandro Grussu June 2013 Games
  • new game - R2-D2 (Exam)i'm glad to announce new Russian game for ZX Spectrum 48/128 by [I]Alexey Kashkarov (kas29)[/I] - [B]R2-D2 (Exam)[/B]: [IMG]http://i48.fastpic.ru/bi…

    ... as well. I switched from MegaLZ to zx7. 69 bytes decompressor.[/QUOTE ... />
    [QUOTE=Alessandro Grussu;704290]ZX7 is a great, easy-to ... ]

    I'm using MegaLZ in The Speccies and I ... just tried switching to zx7 compression instead, and my levels ...
    Sokurah Sokurah June 2013 Games
  • LZ4 decoderI encountered the [URL="http://code.google.com/p/lz4/"]LZ4 compressor[/URL] a few weeks ago. Reading the [URL="http://fastcompression.blogspot.co.uk…

    ... ratio?
    Hrust, Hrum, MegaLz, RNC, BitBuster.[/QUOTE]
    ... have comparisons versus ZX7 because ZX7 and LZ4 are ... [code] Original LZ4 ZX7 LZ4:original ZX7:original ZX7:LZ4

    ZX7 produces files around 85 ...
    stephenw32768 stephenw32768 October 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…

    ... generic compression method like mentioned ZX7 or MegaLZ.

    Or maybe ...
    Ralf Ralf 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 …

    ... . The one already tested ([b]zx7[/b]) has an excellent compression ... as [b]pletter[/b], [b]megalz[/b] or [b]bitbuster[/b].
    Metalbrain Metalbrain January 2016 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... drawback with zx7 is useage of the stack. MegaLZ doesn't use ... . Maybe another version of the zx7 decompressor can be made that ...
    FrankT FrankT April 2016 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... /> If you invoke MegaLZ with CALL and/or MegaLZ exits with RET ... using the stack. Even if MegaLZ itself doesn't use the ... (zx7ret+1),HL
    JP zx7
    returnaddress:

    With ... the RET in zx7 replaced with a JP (labelled ...
    FrankT FrankT April 2016 Brand new software
<1234567…21>

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  • MegaLZ unpacking problemEverytime I try to unpack something with MegaLZ's build in decompressor (using the -d option), the second half of the data is corrupted. The Z80-base…
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