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<1234567…34>
  • 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…

    ... ZX7 |RCS+ZX7
    -----------+------+-------+-------
    Cobra.scr | 6912 | 2452 | 1768
    ... 2827
    -----------+------+-------+-------
    scrh-1.scr | 6912 | 5183 | 4701
    ... ee/eng/authors/e/einar/"]Cobra.scr[/URL] packed with [URL ...
    Einar Saukas Einar Saukas January 2013 Development
  • LgK image compressorOk people, i decided to make it proper thread since i've finally got something tested & useful for everyone. Here is my "chunky" ZX image compressor …

    ... LKsfx
    -----------+------+-------+-------+-------+-------
    Cobra.scr | 6912 | 1768 | 1764 ... 1423 | 1762
    Elexis.scr | 6912 | 1862 | 1846 ... /> -----------+------+-------+-------+-------+-------
    scrh-1.scr | 6912 | 4701 | 4687 ...
    Lethargeek Lethargeek 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 …

    ... bytes|244 bytes
    -----------+--------+--------+---------
    Cobra.scr |709576 T|542757 T|499841 ... T
    Elexis.scr |740872 T|562310 T|516149 ... T
    LedZep.scr |841544 T|632909 T|578720 ...
    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 …

    ... /> printf("\nlinxor v0.99, a SCR filter to linear xored output ... (" linxor \n\n"),
    printf(" .SCR file to filter\n"),
    antoniovillena antoniovillena 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 …

    ... /> However, if you first reverse Cobra.scr using RCS, then compress it ...
    -----------+------+------+-------
    Cobra.scr | 6912 | 2452 | 1737
    Elexis.scr | 6912 | 2723 | 1834 ...
    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 …

    ... this filter with ZX7 and Cobra.scr you down from 2453 to ...
    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 …

    ... RCS format and got the Cobra.scr down to 1737 bytes also ... /> ret
    [/code]Bitmap to SCR (46 bytes)
    [code] ld ...
    FrankT FrankT 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 …

    ... br /> scrh-1.scr | 6912 | 5183 ... 6564
    -----------+------+------+------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+--------+--------+--------
    Cobra.scr | 6912 | 2452 | 1737 ...
    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 …

    [QUOTE=antoniovillena;674383]Sorry. My intuition has failed. As you has tested, we add redundancy with the XOR: the bits lost in the matches are more than the bits won in the zeroes.[/QUOTE]

    I realized that my intuition doesn't work so well ...
    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 …

    Oh yeah, that works, I make that now 1724 bytes for the Cobra scr, 13 bytes improvement, well done!
    jamorski jamorski 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 …

    ... Compression of Cobra.scr was 13 ... -----------+------+-------+-------+---------------+-----------
    scrh-1.scr | 6912 | 5183 | ... | 5030
    -----------+------+-------+-------+---------------+-----------
    Cobra.scr | 6912 | 2452 | 1737 | ...
    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 …

    ... del compressed.zx7
    zx7 cobra.scr compressed.zx7
    echo define ...
    antoniovillena antoniovillena 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 …

    ... |LermCC|ZX7+decompressor
    -----------+------+------+----------------
    Cobra.scr | 6912 | 4502 | 2452+69
    Elexis.scr | 6912 | 4993 | 2723+69
    LedZep.scr | 6912 | 5281 | 3423+69[/CODE ...
    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…

    ... such as "Cobra.scr") into the RCS format (producing "Cobra.scr.rcs") using ... file (in this case "Cobra.scr.rcs") using your favorite ... such as ZX7 (thus producing "Cobra.scr.rcs.zx7");

    ... Finally put this data block ("Cobra.scr.rcs.zx7") inside your ZX ...
    Einar Saukas Einar Saukas January 2013 Development
  • 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…

    ... -X and MegaLZ packed the Cobra Screen to 1734 bytes without ... to original RCS format (drag Cobra.scr onto scr2orcs.exe).
    MegaLZ ... RCS format. Drag and drop .scr onto scr2rcs.exe.
    [url ...
    FrankT FrankT January 2013 Development
  • 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…

    ... and MegaLZ packed the Cobra Screen to 1734 bytes ... is not very favorable to Cobra.scr, but it is to ... screens such as LedZeppelin.scr. If we use the ... ZX7, it will reduce Cobra.scr to 1724 bytes only ( ... your results). However LedZeppelin.scr will compress to 2890 ...
    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 …

    ...
    if exist cobra.scr.zx7 del cobra.scr.zx7
    zx7 cobra.scr
    bas2bin ... dzx7_standard.bin ^
    hdata 'COBRA' 9C40 cobra.scr.zx7
    [/CODE]

    antoniovillena antoniovillena 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…

    ... /> I tried it on that Cobra.scr and it got around 95 ...
    joefish joefish January 2013 Development
  • 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…

    ... works, here's the original Cobra.scr with and without attributes:
    Einar Saukas Einar Saukas January 2013 Development
  • 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…

    ... +Joe
    -----------+--------+--------+--------+------------+--------+--------
    Cobra.scr | 41.76% | 58.24 ... 94.45%
    Elexis.scr | 33.29% | 66 ... /> -----------+--------+--------+--------+------------+--------+--------
    scrh-1.scr | 57.43% | 57. ...
    Einar Saukas Einar Saukas January 2013 Development
  • 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…

    ... br /> -----------+------+------+-------+-------+-------+-------+------+-------+--------+--------+------+-------
    Cobra.scr | 6912 | 2452 ... br /> scrh-1.scr | 6912 | 5183 ...
    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 …

    ... previously compressed using RCS (like "Cobra.scr.rcs.zx7") and automatically convert ...
    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 …

    ... bytes|110 bytes
    -----------+--------+--------+---------+---------+---------
    Cobra.scr |709576 T|542757 T| 499841 ... T|2103116 T
    Elexis.scr |740872 T|562310 T| 516149 ... T|2120175 T
    LedZep.scr |841544 T|632909 T| 578720 ...
    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…

    ... [code]
    6.144 cobra-uncompressed-withoutheader.bin
    6 ... .444 cobra-uncompressed.tiff
    2 ... [url]http://antoniovillena.es/imagenes_foros/cobra-test.zip[/url]
    ... )[/QUOTE]

    Cobra.scr without attributes is compressed to ...
    Einar Saukas Einar Saukas February 2013 Development
  • 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…

    ... both algorithms, based on screen "Cobra.scr" from post [URL="http://www ... based on screen "scrh-2.scr" from post [URL="http://www ...
    Einar Saukas Einar Saukas February 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 …

    ... .ee/eng/authors/e/einar/"]"Cobra.scr"[/URL], encode it with RCS ... now have a file called "Cobra.scr.rcs.zx7" with 1768 bytes ... bytes generated". Finally load file "Cobra.scr.rcs.zx7" at address 40006 ... both together using [B]SAVE "Cobra"CODE 40000,1768+6[/B ...
    Einar Saukas Einar Saukas February 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 …

    ... (155+6=161 bytes) and Cobra.scr (1768+6=1774 bytes). Even ... : LOAD "Rotatrix"CODE 60000: LOAD "Cobra"CODE 60000+161: SAVE "both ... RANDOMIZE USR 60161: REM decompress Cobra to screen
    [/CODE ...
    Einar Saukas Einar Saukas February 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 …

    ... can simply download files "Cobra.scr", "Elexis.scr" and "LedZeppelin.scr" by clicking the ... compressed files called "Cobra.scr.zx7", "Elexis.scr.zx7" and "LedZeppelin.scr.zx7".
    asm
    incbin "Cobra.scr.zx7"
    end asm
    Einar Saukas Einar Saukas May 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 …

    ... the same files "Cobra.scr", "Elexis.scr" and "LedZeppelin.scr" by clicking the diskette ... called "Cobra.scr.rcs.zx7", "Elexis.scr.rcs.zx7" and "LedZeppelin.scr.rcs.zx7 ... /> file1:
    asm
    incbin "Cobra.scr.rcs.zx7"
    end asm ...
    Einar Saukas Einar Saukas May 2013 Brand new software
<1234567…34>

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