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  • Assembler v Machine CodeHi. I've been looking at a lot of the code examples in the Development section and can see that Assembler is the way to go. However, I was wondering …

    ... at a lot of the code examples in the Development ... actually codes in neat Machine Code?

    I use ... total control over the actual code, and where various variables are ... to replace a lot of code if I need to ... an example sheet with some code on it, but I ...
    LuMan LuMan March 2013 Development
  • plus d machine code loader issueas many of you know i have done / been doing quite a few tr-dos recracks for the plus d but i have come into a bit of a problem the plus d machine co…

    ...
    the plus d machine code loader requires you to have ... after is a bit of code to put before the loader ...
    djgarf djgarf April 2013 Sinclair Miscellaneous
  • How to test Z80 Code?Hi All, Is there a way to test a block of z80 code (nothing speccy specific in it) with many different inputs? The reason I ask is that I'm writing…

    ... test a block of z80 code (nothing speccy specific in it ... and want to check my code's output for every combination ...
    Shando Shando May 2013 Development
  • PENTAGRAM and THE CODEHey, I have these two games up for grabs. Pentagram needs no introduction. Just note that the clam is missing 3 of those little thingies that hold …

    ... loads fine :)

    The Code is a 1984 release, or ...
    daniel_gsp daniel_gsp May 2013 Sales
  • Machine code loopsDear all, 30 years too late I know, but I'm finally starting to get to grips with Machine Code - something I could never manage back in my early tee…

    ... get to grips with Machine Code - something I could never manage ...
    Tobo Tobo June 2013 Development
  • Are these files of any use to anyone? (MANIC MINER MUCH FASTER AND SMALLER CODE)I've not touched any of this for 3 years, I thought I lost it when I had to reformat my C: drive. EDIT: These links might work Z80 source [url]http:…

    ... did rip off the movement code from the JSW disassembly after ...
    Paradigm Shifter Paradigm Shifter June 2013 Development
  • CODE SCREEN$ in MCIs there any way of determining what character is displayed at a certain co-ordinate from machine code like the 'IF CODE SCREEN$=' arrangement in bas…

    Is there any way of determining what character is displayed at a certain co-ordinate from machine code like the 'IF CODE SCREEN$=' arrangement in basic?
    daveysludge daveysludge June 2013 Development
  • Machine code assistance please #1Dear all, Learning the ropes here, so please excuse these odd questions which may seem simplistic to you learned lot. This routine is placed at 33…

    ... it gives me 32867.
    [code]
    ld l,155
    ret
    [/code]

    When I add ... the beginning, the following...
    [code]
    ld hl,0
    ld bc,0
    [/code]
    ...it seems to work ...
    Tobo Tobo June 2013 Sinclair Miscellaneous
  • How to write self-relocating code using Pasmo?With z80asm, I can write code like this: [CODE] org 0 ; a total lie, but makes the reloc sums work .dest: equ …

    ... ; target address of relocated code
    ld bc,.reloc_start ... ld bc,.reloc_len ; length of code to relocate
    ldir ... lots of code
    ;; lots more code
    ;; even more code
    < ...
    stephenw32768 stephenw32768 August 2013 Development
  • BIFROST* example: "Knights & Demons DX" source codeA package containing the source files of our multicolor game "Knights & Demons DX" is now available for download [URL="http://www.mediafire.com/?hbch…

    ... ' timer (multiplied by 100)[/CODE]

    The ... br /> BIFROSTstart() ' enable BIFROST*[/CODE]

    This ... () ' wait for next frame[/CODE]

    Even ...
    Einar Saukas Einar Saukas August 2013 Development
  • Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…

    ... a spectrum in assembly/machine code... No fancy screen shinanagins, ... "/program loader.

    [code]
    10 LET X=61440 ...
    Paired registers

    [code]
    03 = INC BC
    3C
    C9
    [/code]

    returns... 61440...
    wibble wibble August 2013 Development
  • Squishing code up nice and small then unsquashing it in assemblyI refer of course to data compression. I've done a search and there are lots of good compressors, but I can't seem to find one that works in assembl…

    ... a short bit of assembly code (exactly what I'm after ...
    R-Tape R-Tape September 2013 Development
  • 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 showing how efficient the code is.

    I've ... to determine how fast the code runs?
    rune rune September 2013 Sinclair Miscellaneous
  • Machine code/Assembly language back in the dayHello. Back in the 80s when I was a kid, I didn't learn Z-80 machine code, but I was always curious about it. Just recently I decided to explore Z-…

    ... attempt at learning machine code on the Spectrum made ... reset and editing the code, which is still waiting ... assembler window. However, writing code on a real Spectrum ... crashing in case bad code is executed? Did they ... who were learning machine code back in the 80s ...
    memrah memrah September 2013 Sinclair Miscellaneous
  • Converting Basic code into machine codeIm just interested to know if I can converter a game I've written in basic into Machine code, Is their a program that can do this??

    Im just interested to know if I can converter a game I've written in basic into Machine code, Is their a program that can do this??
    nonsenceinbasic nonsenceinbasic September 2013 Development
  • 128 BASIC-compatible way of loading BASIC as code?On a 48K Speccy (or from 48 BASIC or USR 0 mode on a 128K machine), one can do a silly trick like this: [code];; load a 4000 byte BASIC program ld i…

    ... trick like this:

    [code];; load a 4000 byte BASIC ... (23620),1

    ret[/code]

    Ta-da, BASIC ... total crash. Loading BASIC as code from the 128 BASIC interpreter ... 's the return from machine code that doesn't.

    stephenw32768 stephenw32768 September 2013 Development
  • LOAD "" CODE - Blind Alleycame across [B]Blind Alley[/B] in the archives, and both tzx/tap versions only have Bytes header, no Basic loader with autostart - please, anyone, ho…

    ... the archive that need LOAD "" CODE?
    de Vandemar Croup de Vandemar Croup October 2013 Games
  • Downloading code to physical hardwareHi folks, Back in the day, my devkit was a TRS-80 and I had a simple connector device from the TRS-80 parallel (printer) port to the expansion bus o…

    ... ways to get PC developed code over to a physical Spectrum ...
    David Jones David Jones December 2013 Development
  • 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…

    ... 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
  • Assembly code auto optimiserFor my Finders Keepers Plus project I'm considering writing an Assembly code auto optimiser. Way back when I wrote the original FK I considered optim…

    ... like this

    [code]
    call SomeSub
    ... ret
    [/code]

    could be ... br />
    [code]
    jp SomeSub
    [/code]

    ... br />
    Example
    [code]
    ; My source
    ;< ...
    David Jones David Jones December 2013 Development
  • Seeing the code/In emulatorHello, Here is my Noob question. Is it possible to see the code for these games in an emulator? To be able to study the code? I am using the Sp…

    Hello,

    Here is my Noob question. Is it possible to see the code for these games in an emulator?

    To be able to study the code?

    I am using the Spectaculator emulator on a PC.

    Thanks,

    M
    MadR13D MadR13D December 2013 Sinclair Basic
  • Get rid of 'Bytes:' when loading codeHow do you hide the 'Bytes:' when loading code? I've tried saving as CHR$ 22 + CHR$ 6+ CHR$ 0 (a blank part of the loading screen) but it still appe…

    How do you hide the 'Bytes:' when loading code?

    I've tried saving as CHR$ 22 + CHR$ 6+ CHR$ 0 (a blank part of the loading screen) but it still appears at 3,0 and disrupts my screen!
    daveysludge daveysludge December 2013 Sinclair Basic
  • Code to test if a rectangle is in a rectangle[SIZE=3][FONT=Calibri]I am looking to write some code that will check if a rectangular shape is outside or overlapping a second rectangle. If the sma…

    ... am looking to write some code that will check if a ... have concocted the following sudo code to achieve this outcome:[/FONT ... , has anyone got some Z80 code that already does this? I ...
    Mr Millside Mr Millside December 2013 Development
  • Code analysis on SNA filesI was wondering if anybody has attempted to convert all TZX/TAP files into SNA files? I would prefer SNA files as they're easy to use and search from…

    ... /> Basically the first bit of code analysis I've been doing ...
    Jimmy Jimmy January 2014 Development
  • About how z88dk generates code and makes room for variables.When you attempt to code games for the 128K models using z88dk in C you need to somewhat control where variables are stored in memory. I thought tha…

    ... ;
    unsigned char *script;[/code]

    If ... for example:

    [code] script_result = 6;
    script_something_done = ... = 8;
    script = 9;[/code]

    I can see ... looking at the generated code:

    [code]ld A, $ ...
    na_th_an na_th_an January 2014 Development
  • Autorun code in an emulator?[FONT=Calibri][SIZE=3]I am using Tommygun and pasmo to develop my game. This works fine but each time the emulator is started and file loaded I then …

    ... type a line of code to execute my code. Is it possible ... it will auto run my code?[/SIZE][/FONT]
    Mr Millside Mr Millside January 2014 Development
  • Help a small machine code game.Hello all you clever wossers are there any GOOD?? games that are in machine code (no basic apart from the loader,rnd usr bit) but are very small ma…

    ... ?? games that are in machine code (no basic apart from the ...
    ASH-II ASH-II January 2014 Games
  • ZX Spectrum code examplesThe shortage of sites with decent code examples seems to be few. The links to alot of sites that used to host them are disappearing into the ether. …

    ... shortage of sites with decent code examples seems to be few ... .

    How about place code examples in this thread or ... special area for zx spectrum code.

    There is a ...
    alienbanana alienbanana February 2014 Development
  • What's wrong with this code?[code]10 LET X=1+INT (RND*99999999): LET Y=1+INT (RND*99999999) 20 INK 4 30 PAPER 0 40 PRINT "Quest for ye flask!" 50 PRINT "?2014 Yoshiatom" 60 PRIN…

    [code]10 LET X=1+INT ( ... 0: CLEAR : GO TO 100[/code]
    For some reson the ...
    Yoshiatom Yoshiatom February 2014 Sinclair Basic
  • Loading AGD games into AGD to check codeHey there Not sure if this is quite the place to put this but it covers both Jonathan's AGD and Spin and is a question about developing my AGD game.…

    ... look at other AGD game code to get [strike]steal some ... my games and view the code to see how things work ... .5) to view the game code?

    Any help gratefully ...
    Maroc's Other Projection Maroc's Other Projection February 2014 Development
<1…6789101112…34>

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