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<1…16171819202122…34>
  • 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
  • Printing textThis is probably quite a basic question, or there might be something obvious I'm missing. I'm looking for an economical way of printing formatted te…

    ... something like this:

    [CODE]
    ld a,2
    INK 1, PAPER 7, BRIGHT 1 ... "LINE 7 TXT",0
    [/CODE]

    The problem is ...
    Morkin Morkin April 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
  • TXT2EMU enhancementI was looking at the encodings supported by BAS2TAP for entering graphics, print controls, etc. as plain text. Basically, there's only one needed, be…

    ... , in:
    [code]DEF FN j$(s,l)=CHR$ PEEK (s)+VAL ... >1)+("""""" AND l=1))[/code]
    replace the quoted FN ... } thus:
    [code]DEF FN j$(s,l)=CHR$ PEEK (s)+VAL ... >1)+("""""" AND l=1))[/code]
    and after TXT2EMU has ...
    Battle Bunny Battle Bunny May 2013 Sinclair Basic
  • 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
  • FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…

    ... URL], and the source code for the proportional printing ... />
    [CODE]CLEAR 59999: LOAD "Sinclair"CODE 60000: LOAD "FZXdriver ... "CODE 65000: RANDOMIZE USR ... TO 127: PRINT #4;CHR$ f;: NEXT f[/CODE]

    ...
    Einar Saukas Einar Saukas June 2013 Brand new software
  • 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
  • Struggling with this routine... Any ideas?I'm trying to write a routine that plots 3 pixels to decrease the energy bar in the top right corner by 5 units, but it just wont have it! There mus…

    ... 't work anyway!)

    [CODE]org 30000
    ld b ... a,96 ;green paper black ink bright
    ld (23695),a ...
    pop bc
    ret[/CODE]
    daveysludge daveysludge July 2013 Development
  • quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…

    ... br /> LET loc=VAL VAL$ (CHR$ PEEK (a-3)+"$"):
    POKE ... around a screen segment
    [/code]

    --

    ... either side as well.
    [code]
    44 LIST 45: ... ): PAUSE 0: STOP
    [/code]
    The vertical bars are ...
    Battle Bunny Battle Bunny July 2013 Sinclair Basic
  • Strider II (and others) + 3 disk versionsHello everyone, I've been working on converting some games to be able to load them from the +3 floppy. I started with single load games but now Im i…

    ... /> Here is the code Im using:

    [CODE]org 23900
    add a,48 ;poke chr$ name
    ld (filename+6 ... />
    rombkup: defb 0,0[/CODE]

    Also I have ... level is loaded:

    [CODE]org 48641

    cp ...
    BCH BCH July 2013 Games
  • 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
  • Strange INK behaviourThis weekend I hooked up two Sinclair ZX Spectrum with Interface 1 to try out the networking capabilities, and I ended up using parts of the Net Game…

    ... the line

    110 INK 1: PRINT AT ly, lx ... when I instead used the INK and PRINT on two separate ... asked for.

    110 INK 1
    115 PRINT AT ... />
    It was like the INK command was neglected or something ...
    mib5150 mib5150 August 2013 Sinclair Basic
  • Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…

    ... set with a different ink bright and flash value.< ... alternates between paper and ink and to make the ... cannot change a pixels ink colour just by changing ... an attribute cell's ink and paper to the ... s cogs are running assembly code, 5 processers generating the ...
    Basher Basher August 2013 Hardware
  • 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
  • JSW2 - Game Loader DifferencesThere are three official releases of JSW2. I'm not counting the 'JSW2-128' version here as far as I'm aware this was not in any way 'official' as it …

    ... to headerless load the game code (47416 bytes) and the keypad ... the loader section, ie all code after the section of
    spider spider September 2013 Sinclair Miscellaneous
  • 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
  • MOVE_M Object Movement Manager for BASICAs moving things around on the screen is usually the slowest part of a game written in BASIC, I've been pottering around with this routine to handle …

    ... to the MOVE_M code.

    [code]
    10 ... /> 9999 RETURN
    [/code]

    [code]
    ; MOVE_M moving ... 31 current
    ; CHR$ = graphic's character code
    ; 0: ... +GOSUB
    ; key = key code from KEY_SCAN key codes table ...
    Battle Bunny Battle Bunny September 2013 Sinclair Basic
  • 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
<1…16171819202122…34>

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