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<1234567…34>
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... 50 delivered (exactly 1/10th of its launch price!). According to ... contraption soldered to various parts of the innards. The pics are ... /> What on earth could its purpose have been?

    The ... as to what the intended purpose of this might have been?
    cmonkey cmonkey October 2011 Hardware
  • im having problems stripping the database out of this code for quill adventure writerim trying to get the database out of rouge midget. ive managed to do this with another game written using quill but this one is too big. theres no…

    ... to get the database out of rouge midget. ive managed to ... i had to remove some of the code in the last game ... trying to load the "rmidget" code file.
    digital digital April 2020 Assembler
  • Can anyone see a way to speed up the following line of code?Hi Folks, Been looking at bottle necks in my code using BASin's Profiler and the following line (well the 2nd LET statement) is somewhat slow. [COD…

    ... at bottle necks in my code using BASin's Profiler and ... slow.

    [CODE]100 LET h=INT (CODE z$(a,4 ... $(a,6)*256+CODE z$(a,5)))[/CODE]

    Does anyone ... ]

    What's the purpose of the code, please give some examples.
    Dr BEEP Dr BEEP July 2011 Sinclair Basic
  • Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…

    Einar, whats the purpose of the

    [CODE]And A[/CODE]

    at the beginning of the code, as ... smaller;

    [CODE]
    ld hl,$4010
    ret[/CODE]

    30 bytes ...
    jamorski jamorski September 2013 Development
  • Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…

    ... whats the purpose of the

    [CODE]And A[/CODE]
    ...
    at the beginning of the code[/QUOTE ...
    [QUOTE=jamorski;720367][CODE]
    ld hl,$4010
    ret[/CODE]

    30 bytes ...
    Einar Saukas Einar Saukas September 2013 Development
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... before the tzx) Out of about 30 games that ...

    The purpose of this code is to halt the program ... /> The added beauty of this code is that you can do ... anything before it of ... />
    Here is the code:

    23432 LD ...
    nuggetreggae nuggetreggae December 2015 Games
  • Optimized (in size) Z80 simulatorI am evaluating Z80 simulators to try to create a tool to analyse z80 programs. I'd like to start with a simple register coverage tool and t-state cy…

    ... and the entry/exit points of a routine are not nearly ... - it may be the only purpose of the code.

    5) Again ... byte "address" in the case of FAR CALL)
    AndyC AndyC September 2016 Development
  • Supertest 128 - Loader QuestionI wonder if someone could explain (in simple terms please) :) , the purpose of the switch code. I see what is doing (going to 48k mode via spectrum)…

    ... simple terms please) :) , the purpose of the switch code.

    I see what ... ? , I'd speculate the actual 'switch' code is to force the goto ...
    spider spider December 2010 Games
  • The Great Mystification: A reflection upon the feebleness of the "distribution denied" policyThis argument has been debated several other times in this place, yet I have not expressed my thoughts about it, and I would like to hear comments by…

    ... Rare and Code Masters, have denied the free distribution of files ... doubt that the assests of companies like Code Masters could be ... argument. Let's suppose Code Masters release a new game ... term "copyright". What is the purpose of copyright, I ask? Normally, it ...
    Alessandro Grussu Alessandro Grussu November 2002 Games
  • I've just found a couple of my old cassettes...Some people have interesting old cassettes full of machine code experiments they made while they were still at school. Not me. I found one cassette…

    ... interesting old cassettes full of machine code experiments they made while ... long gone) featuring a load of BASIC type-in programmes, ... .

    Not all of it though... One item, called ... Gyroscope
    Daley Thompson's Supertest 128
    Yie Ar Kung ...
    Jmk Jmk January 2006 Sinclair Miscellaneous
  • First steps in Z80 machine codeI never got into machine code much back when I had a speccy, as I didn't have any development tools at the time. The only machine code I'd previousl…

    ... got into machine code much back when ... /> The only machine code I'd previously done in ... grips to the basics of Z80 machine code.

    The sole purpose of the above for me to ... of Z80 machine code, seems like loads of registers and a vast number of ...
    Digital Prawn Digital Prawn July 2007 Development
  • what is the purpose of "Group begin/end" entry in a .tzx file ?As far as I understand, for the same information purpose I can use either of the two methods (let's say some levels, each level comprising of several…

    ... the same information purpose I can use either of the two methods ... some levels, each level comprising of several physical blocks):

    What is the benefit of using II instead of I ?

    secarica secarica December 2009 Sinclair Miscellaneous
  • A Miscellany of Dangerous TipsHere's a selection of ideas for using some of the more obscure system variables which I've found handy on occasion. They can be very convenient if us…

    ... /books/MasteringMachineCodeOnYourZXSpectrum.pdf]Mastering Machine Code on Your ZX Spectrum[/url ... used to determine the address of machine code embedded in the program ... available for that purpose.

    Half the battle of knowing where ...
    Battle Bunny Battle Bunny October 2012 Sinclair Basic
  • Simple bit of machine code not working [SOLVED]ishHi all. It's late and I'm tired and I have no idea why the following piece of code wont display a little smiley face [code]ld hl,udg ld (236…

    ... why the following piece of code wont display a little ... face


    [code]ld hl,udg
    ld ... ,126,126,66,60,24[/code]

    I' ... .

    Can one of you clever bunch put me ... out of my misery please?
    ...
    Tobo Tobo March 2016 Development
  • While we're on the subject of BASIC Although my memory of the past still seems to be fairly reliable, memories relating to learning computer programming seem to have disappeared…

    ... immediately grasp the potential of commands like DEF FN ... to pass some sort of educational requirement, all thats ... mention that heresy of heresies to the acolytes of structured programming, ... as a Beginners All purpose Symbolic Instruction Code. That's all ...
    mik3d3nch mik3d3nch February 2019 BASIC
  • CODE instruction in array$ PRINTSo I'm still plugging away at BASIC and have found a line of code (another!) that's really puzzling me. The line is as follows: PRINT A$(P+Q TO P…

    ... and have found a line of code (another!) that's really puzzling ... /> So as I understand the code line, it reads:
    ... a CODE instruction in there and I don't understand the purpose of ... it. Does it return the ASCII value of 8 ...
    LevelUp LevelUp October 2020 BASIC
  • virtual compo Antique Toy 3 (2005) virtual ZX Spectrum music and graphics contest --- 1. ORGANIZERS ------------------------------------------------------------…

    ...
    The first and single purpose of AtoyForm is to set the ... controls --------------------------------------------

    To switch the mouse on you need ... br />
    Newart - shell code and design, intro,
    Relict ...
    kyv_triumph kyv_triumph July 2005 Sinclair Miscellaneous
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... command code byte by the while test. A specific case of switch is ... 0x14" code. You *may* want to do this on purpose (not here ... under text in the switch(), none of the code is run. There is ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…

    ... sector, number of sectors.)

    The main purpose of the command would ... file into memory and then switch to BSDOS and save it ... commands. [B]LOAD %"filename" CODE addr, len[/B] command will ... direction, [B]SAVE %"filename" CODE addr, len[/B] can be ...
    glancaster glancaster April 2008 Development
  • +3 BASIC and RST 8I've been working on adding commands to the BASIC interpreter, in a similar style to how Interface 1 does it (catch the RST 8 error trap). This works…

    ... and functions. Most machine code programs will be under ... RST28 function available for this purpose, which calls the routine ... of ROM1 with the Syntax string, switch to ROM3 for the duration of ... your code and then switch back ...
    glancaster glancaster February 2009 Development
  • Some help needed, pretty please! :-)Hi there WOSsers! Long time no see! :-) I'm going through a process to get all my tape games (some real, some downloaded from here) onto +3 disk. I'…

    ... but you need to switch the game to 48k mode ... the loader). This will switch the game to 48k mode ... loader for Daley Thompson's Supertest 128k. This is a ... somebody could adapt that piece of code and make it relocatable ... the basis to auto switch to 48k mode before ...
    Hercules Hercules March 2010 Sinclair Miscellaneous
  • 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…

    ... the other of IX or IY for whatever purpose. In ... assembler to switch IX/IY in generated code so that ... just get a version of the code using IY instead.
    code (and some of it is important ... machines that need one of the index registers.
    Alcoholics Anonymous Alcoholics Anonymous March 2014 Brand new software
  • Technician Ted disassemblyOkay, by popular (?) demand I have dug out my old disassembly notes on Tech Ted, converted them to skoolkit and stuck them up at [url="https://github…

    ... precise values on screen of the animated characters ... purpose of the message in the main BASIC - "Main code ... is loaded to the value of HL after switch on ... byte of RAM you could reasonably write any code in ... is the start of the main code block. That' ...
    Ritchie333 Ritchie333 January 2019 Assembler
  • Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …

    ... me decipher this z80 assembler code?

    ORG 60000
    of digits
    EA63 3E80 OVFLOW ... is only the first section of the code, but I am having ... is the increment of 1 taking the value of 128 up and ...
    Duxbuz Duxbuz August 2001 Sinclair Miscellaneous
  • Paging questionI've a question regarding paging on the Spectrum 128K, +2, +2A, +3, etc, etc. Suppose we are running a program in the page that happens to be.. well,…

    ... to switch to another page, which contains an exact duplicate of the code ...
    GOC GOC August 2003 Sinclair Miscellaneous
  • Speccy Game Source CodeIs there a way to look at the tape files or convert the tape files to read the source code? Also, is there an archive of source code for various old…

    Is there a way to look at the tape files or convert the tape files to read the source code?

    Also, is there an archive of source code for various older applications?

    Thank you,

    Greg
    GregB GregB May 2005 Games
  • Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …

    ... to the world of machine code I find myself ... have taken a screenshot of the debugger output just ... /> Buffer overflow maybe? The code doesn't make much sense ... isnt changing the exit point of that loop.
    < ... 2 hours exp with machine code shed any light?
    Womble Womble March 2006 Sinclair Basic
  • Any examples of Proportional Font (Dark Star)Dark star had a cool proportionally spaced way of displaying text. Does anyone know of any code to do this? Cheers

    Dark star had a cool proportionally spaced way of displaying text.

    Does anyone know of any code to do this?

    Cheers
    robpearmain robpearmain March 2006 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…

    ... way in understanding the source code if that is your interest ... /> SP1 is a library of machine code subroutines that makes it easy ... z88dk can accommodate your asm code for the heavy lifting.
    purpose sprite engine that can do ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
<1234567…34>

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