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<1234567…34>
  • Self modifying code ??I made a game in C that was mostly accessing arrays and using FOR NEXT loops, I ran out of memory, so I was thinking would it be possible to use sel…

    ... it be possible to use self-modifying code so that say 20 ...
    slenkar slenkar December 2013 Development
  • Newbie's development thoughts.Just wanted to thank WOS development forum regulars, for the amazing information etc contained within these pages. 20+ years ago a did a little asse…

    ... using far too much dirty self modifying code, which I am sure ... as Derek M.Smith's sprite handling routine was greatly helpful ... ... Jaime Tejedor Gomez's ball sprite was/is my placeholder before ...
    uglifruit uglifruit July 2011 Development
  • TommyGun with Debugginghttp://goo.gl/HfSXev?gdriveurl Ok, so this is a pretty big release for me and I have added a lot of stuff into the code editor. Mainly of course …

    ... debugger DOES NOT support [b]self modifying[/b] code.

    [b ... demo project call [i]Big Sprite Demo[/i].
    1. Load ...
    Kiwi Kiwi July 2016 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…

    ... , most Russian code contains self-modifying code and stack tricks that ... player Sergei provides also contains self-modifying code. This has prevented ... to a single masked 3x3 sprite. If this works on ... probably be doing hardware sprite apis and input functions ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…

    ... code. For example between sprite data, or self modifying code.
    e.g ...
    FrankT FrankT November 2006 Emulators
  • The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…

    ... code. For example between sprite data, or self modifying code.
    I guess ...
    gasman gasman November 2006 Emulators
  • The Complete COBRA Disassembly (Joffa's!)Now that I've seen this thread about Skool Daze / Back to Skool disassemblies I've remembered I started an ambitious project quite a few years ago: …

    ... me off for using self-modifying code, pinch my sprite routines, or fix ...
    jonathan jonathan August 2009 Development
  • tricks to simplify codingWhen i started with programming in assembler i had very simple approach to do things. Just shifting bytes around, doing simple tests and so... Later …

    ... do it. I find self-modifying code is much overused and ... struct sp1_ss { // "sprite structs" - 20 bytes - Every sprite is described by ... uchar width; // +2 width of sprite in tiles
    uchar height ...
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Development
  • New Game: Heart StealerMy first platformer is finally released! Having a Speccy since a long time ago, I've really wanted to make a game for it. Since february, I've final…

    ... -optimised, self-modifying assmbler code, designing clever double-buffered software sprite routines, and ...
    ccowley ccowley May 2010 Games
  • New Game: Heart StealerMy first platformer is finally released! Having a Speccy since a long time ago, I've really wanted to make a game for it. Since february, I've final…

    ... -optimised, self-modifying assmbler code, designing clever double-buffered software sprite routines, and ...
    Timmy Timmy May 2010 Games
  • Sprite RotatingI was looking (actually at Everyone's a Wally), and noticed that all the graphics for the main characters are left facing, and two characters wide. …

    ... the same for the entire sprite you can set them up ... the wonders of RAM and self-modifying code.
    Turkwel Turkwel June 2010 Development
  • Help! Reverse engineering a Spectrum game[deleted]

    ... screen
    11 - A slow sprite routine, that is; to display ... size
    12 - A fast sprite routine, that is; optimised for ... a game:

    1) Self modifying code was widely used on ... don't understand the term 'self modifying code' then that simple means ...
    ASM ASM October 2010 Development
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... not quite understand such as self modifying code to store/restore the ... />

    ; --------------------------------------------------------------------------


    ; Sprite arrays.


    player ...
    ASM ASM October 2010 Development
  • Calling All Emulator Authors...Hi guys, This may sound like a crazy idea, but I wondered if it might be possible to incorporate Arcade Game Designer into an emulator in some way? …

    ... builds. Some of it is self-modifying, and I wouldn't expect ... of pre-written plug-in sprite behaviour modules, but that isn ... with extra stuff like screen/sprite editors and such?

    jonathan jonathan September 2012 Emulators
  • Calling All Emulator Authors...Hi guys, This may sound like a crazy idea, but I wondered if it might be possible to incorporate Arcade Game Designer into an emulator in some way? …

    ... builds. Some of it is self-modifying, and I wouldn't expect ... of pre-written plug-in sprite behaviour modules, but that isn ...
    AndyC AndyC September 2012 Emulators
  • The complete Knight Tyme (48k) RAM disassemblyHello! Just a quick note to let everyone know that the initial version of my [URL="http://www.dur.ac.uk/philip.anderson/disassemblies/knight-tyme-48…

    ... well does it cope with self modifying code? Will it flag data ... .

    Likewise, in my sprite routine I would change the ... to see how much the sprite bits needed to be shifted ... I did a lot more self-modifying code than was strictly necessary ...
    David Jones David Jones September 2013 Announcements
  • Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…

    ... of self modifying code use :-

    My main 16x16 sprite routine shifts ... the two bytes of each sprite line left or right by ... at the start of the sprite routine and then editing the ... amount of shifting for that sprite on that occasion.
    David Jones David Jones September 2013 Sinclair Miscellaneous
  • Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…

    ... be afraid to do some self modifying code :). Just be ...
    My main 16x16 sprite routine shifts the two bytes ... of each sprite line left or right ... on the right of the sprite.

    The ... out some reusable code (sprite engine[s], whatever) let ...
    Alcoholics Anonymous Alcoholics Anonymous September 2013 Sinclair Miscellaneous
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... some of the self-modifying code (eg, how the sprite tiles are selected ... a list of 8 active sprite tiles) and perhaps introduce some ...
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Brand new software
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... some of the self-modifying code (eg, how the sprite tiles are selected ... a list of 8 active sprite tiles) and perhaps introduce some ... />
    I don't recommend modifying anything after label "sync_raster". This ...
    Einar Saukas Einar Saukas November 2013 Brand new software
  • Beeper and Sprites at the Same Time?[URL="https://drive.google.com/file/d/0B6XhJJ33xpOWX1pQLS14RnppNFE/edit?usp=sharing"]Why not?[/URL] "q" for quit "m" to change sprite mode any other…

    ... . Tritone contains a lot of self-modifying code to save program state ... , including the stack pointer. The sprite engine I'm using doesn ...
    Alcoholics Anonymous Alcoholics Anonymous April 2014 Development
  • 64x48 monochrome big pixels display ideaHi. I was playing with this idea of having a simple 64x48 bytes buffer, 1 byte per pixel, then a renderer which would take that buffer and render it…

    ... that. The simplest method (for sprite rendering) is to have a ... copying. At some point, using self-modifying code, you swap an INC ... be clever, try combining a sprite layer screen with a scrollable ...
    joefish joefish December 2014 Development
  • Finders Keepers+I know a few of you are interested in this project so I thought it was about time I started a proper thread for it rather than just slipping bits int…

    ... to optimize my new sprite routine with self modifying code and suchlike. It ... .

    So, a simple sprite routine for now. Get a ...
    David Jones David Jones February 2015 Development
  • Proportional-width fontsFor reasons that are still not quite clear to me (because I’ve always loved typography and design,) I never bothered to write a proportional-font rou…

    ... .[/quote]

    Einar used self-modifying code in the original fzx ... windows on screen. The sp1 sprite engine is also capable of ...
    Alcoholics Anonymous Alcoholics Anonymous January 2018 Development
  • Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…

    ... & PASTE is easier than self-modifying code!

    What I ... ridiculously hard. At least with sprite-based games you could identify ...
    joefish joefish March 2019 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... causing flickering of the player sprite if the player is drawn ... with the stack pointer, and self modifying code as well) to do ...
    Paradigm Shifter Paradigm Shifter June 2022 Development
  • Anyone help re-factoring a tile functionI had some excellent feedback for re-factoring my function that displays the colour for my screen tiles. Can anyone offer some help to improve the fu…

    ... 've used a bit of self modifying code to access these at ...
    Mr Millside Mr Millside February 2005 Development
  • RrcaI'm having trouble finding an exact explanation to how all the z80 instructions work, but I get by ok on most of them. I'm sure I've been given link…

    ... , and does a lot of self-modifying and other things, whilst the ...
    mulder mulder October 2007 Development
  • 28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…

    ... memory. This would (a) use self-modifying code, and (b) result in ...
    TSLP3 HALT ; Hang around, modifying the instructions so that the ...
    AMW AMW April 2012 Development
  • Best debugging emulatorI just posted a thread about emulators in the 'Development' discussion. I'm looking for the best emulator for debugging so I can view my code in act…

    ... mustard as I loved using self modifying code back then so the ...
    David Jones David Jones September 2013 Emulators
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