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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…

    ... B]RCS[/B] ("Reverse Computer Screen", or simply ... for several screens using ZX7 compressor, with and without ... /> [CODE]screen file| size | ZX7 |RCS+ZX7
    -----------+------+-------+-------
    Cobra.scr ... RCS before compressing with ZX7, is 1768 bytes. ...
    Einar Saukas Einar Saukas January 2013 Development
  • On the subject of reverse engineeringIn this world of emulated hardware, there are Specchums out there who would like to put their hands on that peripheral they never had, that add-on th…

    ... 't really been explored: the reverse engineering of Spectrum interfaces.
    So, on this subject of reverse engineering, and without deviating the ...
    zxbruno zxbruno May 2008 Hardware
  • Visually reverse engineering a map (Barbarian 2)Sometimes I talk too much, for too long, and mostly about nothing at all in particular. I had spent nearly an hour writing a long-winded, step-by-st…

    ... what I did to visually reverse-engineer the Barbarian 2 map ...
    ZnorXman ZnorXman December 2008 Sinclair Miscellaneous
  • 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
  • Freescape based on reverse engineered "I of the Mask" code?That's what Sandy White has said in this interview just published on Eurogamer: [url]http://www.eurogamer.net/articles/2013-03-06-code-britannia-san…

    ... I remember, that they had reverse engineered my code and based ...
    Mousey Mousey March 2013 Games
  • Reverse Boots, platform game with an original twistHere's a good candidate for a ZX make-under, [b]Reverse boots[/b] by Denis Vasilev. :) I played through the entire game, it's kind of short (only 20 …

    ... a ZX make-under, [b]Reverse boots[/b] by Denis Vasilev ...
    BdR BdR October 2013 New game ideas
  • z80 reverse engineeringI came across Ken Shirriff's blog today where he is reverse engineering the Z80 from images of a Z80 die. I guess this may be of interest to those of…

    ... blog today where he is reverse engineering the Z80 from images ...
    smogit smogit October 2014 Hardware
  • Reverse engineering "Stack Light Rifle"Hello I would like to reverse engineer the electronics inside the connector in the "Stack Light Rifle" to build adapters which can be used with mo…

    ... />
    I would like to reverse engineer the electronics inside the ...
    Boojakascha Boojakascha June 2017 Hardware Preservation
  • Is reverse engineering software now illegal?I just remembered (in conversation with someone earlier) that I read some time back that the Digital Millennium Copyright Act made it illegal to reve…

    ... Act made it illegal to reverse engineer any software that you ... it makes it illegal to reverse engineer specific software, i.e ...
    ewgf ewgf September 2017 Chit chat
  • New game: REVERSE PONGHi! Hello! I wanted to share with you the last little game I have made, taking advantage of confinement. "Reverse Pong". I hope you enjoy it and to m…

    ... made, taking advantage of confinement. "Reverse Pong". I hope you enjoy ...
    Miguetelo Miguetelo March 2020 Brand new software
  • Zynaps scrolling - anyone ever reverse enginnered this?Zynaps has IMO some impressive scrolling - it utilises 18 character rows of the display file, so quite a large active play area, and scrolls 2 pixels…

    ... if someone was able to reverse enginneer how the display is ...
    dmsmith dmsmith July 2020 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 …

    ... ZX7 to compress screens. The new utility will be called RCS ("Reverse ... first reverse Cobra.scr using RCS, then compress it using ZX7, ... The ZX7 standard decompressor is 69 bytes, and the un-reverse routine ... will unpack and un-reverse without using a temporary ...
    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 …

    ... ;674085]Tested this filter with ZX7 and Cobra.scr you down ... using an old version of ZX7, please download it again!
    ZX7). There may be other good ...
    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 …

    ... attributes!

    zx7 Elexis.scr.rcs
    Optimal ... /> rcs LedZeppelin.scr
    Reverse Computer Screen by Einar Saukas ... attributes!

    zx7 LedZeppelin.scr.rcs
    Optimal ... incbin "LedZeppelin.scr.rcs.zx7"
    end asm[/CODE]< ...
    Einar Saukas Einar Saukas May 2013 Brand new software
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... of the unpacked file. For reverse decompression all the counters count ... code and table).

    ZX7 has a safety offset of ... assuming 16 bytes for safety. ZX7 compresses upwards, so there are ... read and write files in reverse order, and make equivalent ...
    GoingDigital GoingDigital September 2013 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... of the unpacked file. For reverse decompression all the counters count ... 't compress as well as ZX7 (it's a byte-oriented ... reason to use it over ZX7, but writing a decoder would ...
    stephenw32768 stephenw32768 September 2013 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... assuming 16 bytes for safety. ZX7 compresses upwards, so there ... read and write files in reverse order, and make equivalent ... "hacked" version of ZX7 that works in reverse order. If anybody else ... me[/URL]. The next ZX7 release will provide official support ...
    Einar Saukas Einar Saukas September 2013 Development
  • Completely free games?Hi, I would like to know if there are any open source or completely free games for ZX Spectrum. Or at least some other free programs without any lin…

    ... /news/7113/creative-patents-carmack-reverse"]prior art from someone else ... .org/infoseekid.cgi?id=0027996"]ZX7[/URL] compressor under a more ... /pub/sinclair/games-info/z/ZX7.txt"]ZX7 documentation[/URL] for a ...
    Einar Saukas Einar Saukas October 2013 Games
  • Completely free games?Hi, I would like to know if there are any open source or completely free games for ZX Spectrum. Or at least some other free programs without any lin…

    ... .org/infoseekid.cgi?id=0027996"]ZX7[/URL] file format from scratch ... things like that, which I reverse engineered without looking at any ...
    David Jones David Jones October 2013 Games
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... my experience with both RCS+ZX7 and Laser Compact 2.5 ... I must say that the reverse-loading screen I tried with ...
    Alessandro Grussu Alessandro Grussu October 2013 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... my experience with both RCS+ZX7 and Laser Compact 2.5 ... I must say that the reverse-loading screen I tried with ...
    stephenw32768 stephenw32768 October 2013 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... LOADER_BACKWARDS
            ;; if loading in reverse, we need to set the ... compression (e.g. Einar's ZX7) as well as a turboloader ...
    stephenw32768 stephenw32768 May 2015 Development
  • .dsk back to +3 original format?Hi everyone! I recently stumbled over my spectrum +3 and i decided to replace its 3" dead drive for a 3.5" one. After some time, i was able to put it…

    ... i want to do the reverse.
    aqua aqua February 2003 Sinclair Miscellaneous
  • Reverse Engineer GamesI always wanted to do it.. in fact.. i did study 'space invaders' by Taito.. many years ago...disassembled the code and attempted to understand each …

    I always wanted to do it.. in fact.. i did study 'space invaders' by Taito.. many years ago...disassembled the code and attempted to understand each part.
    (did u know its only a 6k program.)
    What i realy want to find out though,, has anybody ...
    STAMPER STAMPER September 2003 Games
  • Name the game #111003Back in the original days of my speccy I used to have a game that involved making deliveries in an articulated HGV - the HGV was drawn wire frame and…

    ... frame and you had to reverse it into loading bays and ...
    BuzzinRich BuzzinRich October 2003 Games
  • Fuse 0.6.2.1 releasedIn a phenomenon which is becoming unfortunately common, the Fuse team hereby announce the release of Fuse 0.6.2.1. This is basically a bugfix release…

    ... corruption (Simon Tatham).
    + The reverse page mapping for 0xc000 - 0xffff ...
    Philip Kendall Philip Kendall February 2004 Emulators
  • SDP: Floppy adaptors available to contributers !!!Hi folks, I've got a few more of those plus 3 adaptors that will allow you to read and write your 3" disks. The aim is to get you all motivated int…

    ... my PCs floppy power but reverse the cable because 5v and ...
    Andrew Barker Andrew Barker March 2004 MIA/STP/SDP
<1234567…34>

Latest Posts

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    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
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    mel the bell on April 21
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  • Reverse Engineer GamesI always wanted to do it.. in fact.. i did study 'space invaders' by Taito.. many years ago...disassembled the code and attempted to understand each …
  • On the subject of reverse engineeringIn this world of emulated hardware, there are Specchums out there who would like to put their hands on that peripheral they never had, that add-on th…
  • Visually reverse engineering a map (Barbarian 2)Sometimes I talk too much, for too long, and mostly about nothing at all in particular.<br /> <br /> I had spent nearly an hour writing a long-winded…
  • WTF???? Reverse-engineering a ZX Spectrum[url]http://www.youtube.com/watch?v=4AeAKrDRhcc[/url]
  • 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 (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…
  • Freescape based on reverse engineered "I of the Mask" code?That's what Sandy White has said in this interview just published on Eurogamer:<br /> <br /> [url]http://www.eurogamer.net/articles/2013-03-06-code-b…
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