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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 FOR ... NEXT loops use the same code?
    or 20 array look ... ups can use the same code?

    When using C ... write out all the machine code necessary to do loops and ...
    slenkar slenkar December 2013 Development
  • Death of the Computer Science DepartmentRead this article on the death of the computer science department in universities by Neil McBride from De Montfort. It makes very interesting (and wo…

    Read this article on the death of the computer science department in universities by Neil McBride from De Montfort. It makes very interesting (and worrying) reading.

    [url]http://www.bcs.org/server.php?show=ConWebDoc.9662[/url]
    Scottie_uk Scottie_uk February 2007 Chit chat
  • Emulators on a ZX Spectrum sectionIsn't it time to mention the emulators ON the ZX Spectrum in a special session. I know of 4 emulators for the ZX Spectrum right now: 1) ZX81EMUL (h…

    ... bit of self-modifying code and it tries to take over the computer and ... erase the other bit of code. Quite fun ...
    Philip Kendall Philip Kendall August 2006 Emulators
  • designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…

    ... to build a VERY simple computer, what do you guys reccomend ... to make a quick prototype computer that can do...lets ... accumulator equal to zero
    [/CODE]

    Pretty basic, ... you don't mind using self-modifying code to simulate addressing modes. Throw ...
    GReW GReW October 2010 Chit chat
  • Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …

    ... on registers, you might use self modifying code and store the size of ... more important. On a 64k computer, you have to consider how ... plus extra constant time code due to code complication be paid back ... typically done on a 64k computer.[/QUOTE]

    Of ...
    Patrik Rak Patrik Rak June 2012 Development
  • Beepola v1.08 AvailableA new version of Beepoa, v1.08, is now available for download from:- [url]http://freestuff.grok.co.uk/beepola/[/url] (1.76MB zipped exe, no installe…

    ... :

    * There is no self-modifying code. Now it can sit in ... into consideration -- accommodating any z80 computer does not have to cost ...
    Alcoholics Anonymous Alcoholics Anonymous April 2014 Announcements
  • BASIC Tenliners 2016I would like invite all basic programmers to this year's BASIC Tenliners contest. You have to code a game in 10 lines of BASIC. For details please ta…

    ... ?

    Would
    [code]
    10 PRINT "Lives:";10 ... /> What's the stance on self-modifying code? eg. Once the startup routine ... you can't have "self-written" machine code, so its OK to ... code routines that are built into the ROM of the computer ...
    GReW GReW January 2016 Announcements
  • BASIC Tenliners 2016I would like invite all basic programmers to this year's BASIC Tenliners contest. You have to code a game in 10 lines of BASIC. For details please ta…

    ... [/quote]

    one control code = one character

    [ ... What's the stance on self-modifying code? eg. Once the startup ... can't have "self-written" machine code, so its OK to ... code routines that are built into the ROM of the computer ...
    Bunsen Bunsen January 2016 Announcements
  • In-game AY music and sound effectsI'm currently working on various aspects of a Spectrum game and thinking now about the sound side of things. I know you can use a utility like Vortex…

    ... go in and change the code which is why I've ... it off. Mainly it's self-modifying code that has to be eliminated ... easier and would eliminate extra code just to have the musician ... can even be used for computer-y voice synthesis. Although it ...
    Alcoholics Anonymous Alcoholics Anonymous March 2017 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... random things :)

    [code]
    ld de,#7102 ;E ... machines and then just use self-modifying code to inject the port ... Spectrum is a true quantum computer. You can technically calculate ... ” it in your real-life code . . . “the wave function collapses ...
    Ast_A_Moore Ast_A_Moore September 2017 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 run ... value is modified by the code. See above
    TILERENDERLP LD ...
    Mr Millside Mr Millside February 2005 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…

    ... />
    Secondly - people making source code available! So eye-opening! My ... using far too much dirty self modifying code, which I am sure better ...
    uglifruit uglifruit July 2011 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…

    ... . This would (a) use self-modifying code, and (b) result in ... 48k Spectrum. (Based on code from "Advanced Spectrum Machine ... Back to lurking...

    [CODE]

    ; Assemble 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…

    ... so I can view my code in action and single step ... I can recreate the source code and then write Finders Keepers ... mustard as I loved using self modifying code back then so the disassembly ...
    David Jones David Jones September 2013 Emulators
  • IX+n and self modifying code and pasmoI'm using pasmo and if I wanted to use ix+n like this: (ix holds the position to a sinus table) ld (symbol), a LD a, (ix+symbol) What I want to do…

    I'm using pasmo and if I wanted to use ix+n like this:

    (ix holds the position to a sinus table)

    ld (symbol), a
    LD a, (ix+symbol)

    What I want to do is to use LD a, (ix+n), but declare n as a variable, and modify ...
    Arda Arda January 2015 Development
  • Problems with AY sound. Experts needed. :-)<div><span style="font-family: Arial, Verdana; font-size: 13.3333330154419px; line-height: normal;">I need to play some AY sound effects, so I've bee…

    ... Editor package (and his player code) as that seems simple ... and stripped all non-essential code away and made some ... not use interrupt or have self-modifying code. Compile the file "compilethis. ... 3 lines of the source code. The label musInitAd (currently)  ...
    Sokurah Sokurah June 2015 Development
  • Disassembly starting from a tape fileFollowing on from the Atic Atak redefining keys thread, I was wondering how you'd go about disassembling the code from scratch. The approach used in …

    ... d go about disassembling the code from scratch. The approach used ... project was to snapshot the code once it's running ... data structures have been initialised, self modifying code has run, etc., which isn ... thinking of looking at the code from the start. Assuming ...
    thricenightly thricenightly September 2017 Development
  • Speccy snaphot to EXE I seemed to remember and reading at http://www.worldofspectrum.org/warajevo/Features.html I found[quote]Using the additional program ZXCOMP the Z80 …

    ... nearly impossible for many reasons (self-modifying code for example). So, ZXCOMP converts ... kind of P-code (more precisely, packed Z80 code) and links it ... 48K for 128K snapshots. P-code is usually about half size ...
    NRA NRA December 2018 Games
  • Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …

    ... probably misled. I meant no self-modifying code. Anyway drop me a line ...
    Geoff Geoff July 2002 Sinclair Miscellaneous
  • Z80 coders compoIf you're interested in Z80 coders compo, visit my page [url="http://mbr.nm.ru/compo.html"]http://mbr.nm.ru/compo.html[/url]

    ... especially interested if a non-self-modifying code version of yours would still ...
    Alcoholics Anonymous Alcoholics Anonymous November 2003 Development
  • T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …

    ... 'd usually start looking at self-modifying code (because I'm evil like ...
    gasman gasman April 2004 Development
  • T.I.M. - A New Interlace - Demo for DOWNLOADHere's something that's been in the works for quite a while ( mostly in my head ) and recently I've aquired assistance to help it come to fruition. …

    ... 'd usually start looking at self-modifying code (because I'm evil like ...
    Alcoholics Anonymous Alcoholics Anonymous April 2004 Development
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... : with something like:

    [code]
    LD DE,16
    LD (HL2),HL
    [/code]

    And then replace ... is the simplest form of self-modifying code. Basically your storing the value ...
    AndyC AndyC September 2004 Development
  • Reading the keyboardDoes anyone have a code sample to read the keyboard in machine code ?

    ... see its a bit of self-modifying code. LD (CALLADDR+1),DE modifies ...
    dmsmith dmsmith November 2004 Development
  • Reading the keyboardDoes anyone have a code sample to read the keyboard in machine code ?

    ... see its a bit of self-modifying code. LD (CALLADDR+1),DE modifies ... were paying attention...

    Self modifying code, the scourge of anyone trying ...
    rich_chandler rich_chandler November 2004 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…

    ... used a bit of self modifying code to access these at ... speed enhancements ?

    [code]
    ORG 50000

    code. See above
    ... /> First I made the code readable with {code} and {/code} ( use [] ISO {} ...
    Dr BEEP Dr BEEP February 2005 Development
  • MC TipPlace your MC tip here: Here is my first: When using alternate registers (EXX) the HL register must not be affected on return to BASIC. Also the IY…

    Self modifying code is fun, saves a byte ... the first example:

    [code]
    exx
    ld (savehl ... br /> exx
    ret
    [/code]
    Other fun stuff - using ... the instructions it may allow code to be written better and ...
    Quazar Quazar November 2005 Development
  • MC TipPlace your MC tip here: Here is my first: When using alternate registers (EXX) the HL register must not be affected on return to BASIC. Also the IY…

    ... 13, Quazar wrote:
    Self modifying code is fun, saves a byte ... first example:

    [code]
    exx
    ld ( ... br /> exx
    ret
    [/code]
    [/quote]

    ... That's what my code used as well, but I ...
    Dr BEEP Dr BEEP November 2005 Development
  • ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…

    ... QUOTE=MikeW]
    [code]
    This should ... run Residos without issue.
    [/code]

    Comments anyone ... CamelForth (apologies for the self-modifying code):

    [code]
    ;Z ... /> jr gbltend
    [/code]

    Garry
    glancaster glancaster April 2006 Hardware
  • How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…

    ... the system involves checksums and self-modifying code and god knows what else ... by recognising the specific loader code as a pattern, or by ...
    Laser Laser May 2006 Emulators
<1234567…34>

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  • Self modifying code ??I made a game in C that was mostly accessing arrays and using FOR NEXT loops,<br /> I ran out of memory, so I was thinking<br /> <br /> would it be p…
  • IX+n and self modifying code and pasmoI'm using pasmo and if I wanted to use ix+n like this:<br /> <br /> (ix holds the position to a sinus table)<br /> <br /> ld (symbol), a<br /> LD a, …
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