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<1…14151617181920…34>
  • Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …

    ... screen updates are structured in Cobra:

    0. The beginning ... kind of a delay routine. Cobra uses the floating bus reads ... case, if there is any code to execute between 0 and ... , or do a bit of code then wait for IN A ...
    R-Tape R-Tape May 2012 Development
  • Trident PD TapeI've been going through a tape and found that its the contents of the Trident PD tape. What is the preservation status of this ? I would have to h…

    ... :

    Side A:
    [code]
    1- A: Description: Created ... .831s
    42-1B25B: Program : SCROLLER Length: 19 Normal Speed ,Pause ... : -------------------- Length: 15002 Normal Speed
    [/code]

    The Index can ...
    Andrew Barker Andrew Barker May 2012 MIA/STP/SDP
  • Your Sinclair Smash Tips - Corrected ListingsOver at Hercules' [URL="http://craigsretrocomputingpage.eu5.org/smashtips/index.html"]YS Smash Tips site[/URL] he has a list of hacks that don't work…

    Cobra - [URL="http://www.worldofspectrum.org/ ... to StuBruise![/URL]

    [CODE] 10 CLEAR 65000
    20 ...
    jp jp August 2012 Games
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... )/Musical 1 (with music)
    [*]Cobra - Hit Squad (the "bugfix" version ... TAP file, coming with source code, can be downloaded from [URL ...
    Alessandro Grussu Alessandro Grussu November 2012 Games
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... )/Musical 1 (with music)
    [*]Cobra - Hit Squad (the "bugfix" version ... TAP file, coming with source code, can be downloaded from [URL ...
    Alessandro Grussu Alessandro Grussu December 2012 Games
  • 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 …

    ... ticks (in T-states):
    [CODE]
    |Standard| Turbo | Mega
    -----------+--------+--------+---------
    Cobra.scr |709576 T|542757 T ... bytes would compensate the additional code to correct ordering again... This ...
    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 …

    ... one is this:

    [CODE]
    #include
    int main ...
    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 …

    ... , if you first reverse Cobra.scr using RCS, then ... ZX7 demo:

    [CODE]screen file| size | ZX7 | ... | 5638 | 5030
    -----------+------+------+-------
    Cobra.scr | 6912 | 2452 | 1737
    [/CODE]

    These statistics ...
    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 ... RCS reorder algorithm:

    [CODE] int i = 0;
    for ...
    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 …

    ... format and got the Cobra.scr down to 1737 ... br /> Quickly cobbled together this code to convert a screen in ... RCS at $8000.
    [code]; Bitmap to RCS (37 bytes ... ldir
    ret
    [/code]Bitmap to SCR (46 bytes ... )
    [code] ld hl,$c000
    ...
    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 …

    ... 1 xxxxxxxx ... 0000000000000000[/CODE]

    -----------+------+------+------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+--------+--------+--------
    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 …

    ... cobra file: RCS+ZX7. These are the offsets in hexadecimal:
    [CODE ... /> These are the statistics:
    [CODE]
    offset 000: 75 / 599 ... bits, for example:
    [CODE]
    000: offset 000
    [/CODE]

    So read ...
    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 …

    [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 …

    ... results I got:
    [CODE]screen file| size | ZX7 ... | 5029 | 5030
    -----------+------+-------+-------+---------------+-----------
    Cobra.scr | 6912 | 2452 | 1737 | 1724 ... % | 52.96%
    [/CODE]
    Notice that reverting the ...
    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 …

    ... block with the proper startup code.

    I' ... [CODE]
    if exist compressed.zx7 del compressed.zx7
    zx7 cobra ... demo.asm file:
    [CODE]
    include define.asm
    [/CODE]

    If you write ...
    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 …

    ... /> [url]http://antoniovillena.es/imagenes_foros/COBRA.tap[/url][/QUOTE]

    Code Compressor 1[/URL] to compress ...
    TK90XFan TK90XFan 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 …

    ... /infoseekid.cgi?id=0013142"]Lerm Code Compressor 1[/URL] to compress ... /> [CODE]
    screen file| size |LermCC|ZX7+decompressor
    -----------+------+------+----------------
    Cobra.scr ... .scr | 6912 | 5281 | 3423+69[/CODE]
    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 …

    ... has copy protection. In the Cobra.tzx the protection method is ... generation I avoided the LOAD""CODE because this will add ... BIOS, instead:

    [CODE] ld ix, source
    ld ... scf
    call $0556
    [/CODE]

    I use:
    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…

    ... into the RCS format (producing "Cobra.scr.rcs") using the command ... file (in this case "Cobra.scr.rcs") using your favorite ... [*]Finally put this data block ("Cobra.scr.rcs.zx7") inside your ... SCR to RCS:

    [CODE] int i = 0;
    // ...
    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 ... )

    Retro-X unpacker code is from older version of ...
    LCD LCD 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 ... )

    Retro-X unpacker code is from older version of ... is not very favorable to Cobra.scr, but it is to ... apply ZX7, it will reduce Cobra.scr to 1724 bytes only ...
    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 …

    ... .bin ^
    hdata 'COBRA' 9C40 cobra.scr.zx7
    [/CODE]

    demo ... .bas
    [CODE]
    10 ... LOAD""CODE: LOAD""CODE: LET x=40000 ...
    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…

    ... not considered):

    [CODE]screen file|original|adjusted| Pre ... Joe |Pre+Joe
    -----------+--------+--------+--------+------------+--------+--------
    Cobra.scr | 41.76% | 58.24 ... | 76.08% | 76.06%
    [/CODE]

    The meaning of ...
    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…

    ... "preprocessing" pixels first):

    [CODE]screen file| size | ZX7 |RCS ... |Exomizer|+gzip |+gzip
    -----------+------+------+-------+-------+-------+-------+------+-------+--------+--------+------+-------
    Cobra.scr | 6912 | 2452 | 1768 | ...
    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…

    ... wanted to test how the Cobra pic after JoeFish's prediction ... change anything or add extra code.

    scrh-2.scr ...
    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 …

    ... 110 bytes):
    [CODE]; -----------------------------------------------------------------------------
    ; ... br />
    ; -----------------------------------------------------------------------------[/CODE]

    This ... (like "Cobra.scr.rcs.zx7 ...
    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 …

    ... ticks (in T-states):
    [CODE] |Standard| Turbo | Mega |SmartRCS ... 110 bytes
    -----------+--------+--------+---------+---------+---------
    Cobra.scr |709576 T|542757 T ... | 334.8% | 279.9%[/CODE]

    These results indicate ...
    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…

    ... /> [url]http://antoniovillena.es/imagenes_foros/COBRA.tzx[/url]
    [url]http ... fool basic into running machine code? Which I vaguely recall seeing ...
    Gedlion Gedlion 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…

    ... fool basic into running machine code? Which I vaguely recall ... />
    generador.bat
    [CODE]
    call process "Mario Bros ... "Cobra.tzx" 67de 9822 af10 COBRA b3 b1 b1
    [/CODE]

    process.bat
    [CODE ...
    antoniovillena antoniovillena January 2013 Development
<1…14151617181920…34>

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