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  • ML routines from BASICCan anyone tell me which registers should be saved and restored when calling a ML routine from BASIC? How can one know which registers are modified …

    Can anyone tell me which registers should be saved and restored when calling a ML routine from BASIC?

    How can one know which registers are modified inside a system routine?

    Should the stack be also changed?
    rinconete rinconete March 2009 Development
  • Help needed to convert TZX/CDT format to buffered dataHi together, I registered today because I could need some help from ZX-Spectrum emu-coders. I am developing an Amstrad CPC emulator in JAVA, which …

    ... /> So I need a JAVA routine, which converts a TZX/CDT ...
    Devilmarkus Devilmarkus April 2009 Emulators
  • New Spectrum Game - W*H*BTo mark the Speccy's 27th birthday tomorrow I've finished W*H*B, which is a bit of a WOS community project, and is now available from my website. [U…

    ... to Mister Beep for the beeper tunes, Kev Thacker for the ...
    bobs bobs April 2009 Games
  • What happened to...A thread for the old ideas that are still hanging around on the forum somewhere. I'll start with that Zelda-esque game that somebody drew a nice map…

    ... were used in a sprite routine demo or something too, possible ...
    mulder mulder April 2009 New game ideas
  • Simple text compressionI just checked one idea about text compression. Do not take it as recomendation but rather as info which can you save some time when you are solving …

    ... will be solved in print routine)
    3) remove all characters ...
    Fikee Fikee May 2009 Development
  • Tape and Disk breakpointsIs it possible to set a breakpoint on a .TAP, .TZX or .DSK file so that the debugger pops up when loading finishes? I'm talking about a breakpoint wi…

    Is it possible to set a breakpoint on a .TAP, .TZX or .DSK file so that the debugger pops up when loading finishes? I'm talking about a breakpoint without the need to study the loading routine via the debugger. Thanks.
    zxbruno zxbruno May 2009 Emulators
  • Best way to store vector images in Sinclair BASIC?Let's forget for a moment that Sinclair BASIC is slow. If I have a picture made entirely of vector images, what would be the best way to store that d…

    ... ] was, for example, 256, the routine would skip PLOT, DRAW a ... planning on using a FILL routine for now. [I]That[/I ...
    zxbruno zxbruno May 2009 Sinclair Basic
  • Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …

    ... jump to the main interrupt routine:
    ld hl,sample_jump ... br />

    ;Main interrupt routine:
    ;-----------------------
    interrupt_main


    ;Example jump to interrupt routine:
    sample_jump
    jp interrupt_main ...
    joefish joefish May 2009 Development
  • Jumping to BASIC after importing 23296,1703Sorry for the confusing title. :-D Now that I've learned how to stop a game from starting after loading (in Fuse and Specemu), I have a few more que…

    ... be able to run a routine that would allow me to ...
    zxbruno zxbruno May 2009 Sinclair Miscellaneous
  • Getting started with ... part II (help needed)Hi to everyone. I just founded simple wiki to solve usual problem "how to do [placeholder] in asm?". Check it on [url]http://zxsnippets.wikia.com[/ur…

    ... nice to have your Bezier routine there.

    I would ...
    Fikee Fikee May 2009 Development
  • ZX music for *TWO* BEEPERS :)Hi there. :) For some time I was thinking about making for ZX Spectrum an additional sound-card playing BEEPER music without Spectrum's CPU time. I…

    ... an additional sound-card playing BEEPER music without Spectrum's CPU ... and better envelopes than regular BEEPER.
    Sadly I know nothing ...
    Mister Beep Mister Beep May 2009 Sinclair Miscellaneous
  • The [You] awardsI'm bored, so I thought I'd do the traditional ewgf Spectrum awards, for the first time ever. Once you've ignored my post, please post your own winne…

    ... /+, which only had the internal beeper).
    [B]


    ewgf ewgf June 2009 Games
  • More 1-bit music from Mr BEEPGot an e-mail this morning but didn't see a thread, so here it is: [url]http://berlin_hq.micromusic.net/bhack.html[/url] [QUOTE]BHQ001 MISTER BEEP …

    ... on a single square wave beeper.

    [/QUOTE]

    zxbruno zxbruno June 2009 Sinclair Miscellaneous
  • Tips on (dis-)assembling Z80 instructionsedit: Naturally I managed to post this in the wrong forum. I'd much appreciate it if any moderator would move it to the development section. For the…

    ... interested in optimizing the assembly routine for size and the disassembly ... routine for speed if that makes ...
    doynax doynax June 2009 Development
  • Tips on optimizing some newbie assembly routinesI'm starting to learn some assembly language. The best way to learn is to actually code something you are going to use, so I'm creating a very simple…

    ... table of characters, and a routine which reads the grid and ... 8x8 tiles.

    My routine reads from _MB23_grid a character ...
    na_th_an na_th_an June 2009 Development
  • Full .TAP file loading over the networkDevelopment of the Spectranet ROM modules continues... Courtesy of the new filesystem layer, the experimental TNFS (Tiny Network Filesystem), and th…

    ... excution inside the LD-BYTES routine in the Spectrum's main ...
    Winston Winston June 2009 Hardware
  • Channels and streams - reading dataThe FAQ here - [url]http://www.worldofspectrum.org/faq/reference/48kreference.htm[/url] - seems to be just a touch inaccurate when it comes to readin…

    ... />
    It says "The input routine must return data in the ... seems. If I write a routine to return data to a ... the ROM's ADD-CHAR routine, at least that's how ...
    Winston Winston July 2009 Development
  • GAC QuestionThere is probably a really simple way of doing this but its driving me up the wall. In GAC is there a way of ending the game ( you get killed ) if y…

    ... think I read about a routine like this in some help ...
    ZX Beccy ZX Beccy July 2009 Development
  • MIDI-out disassembly?Does anyone have the disassembly of the MIDI-out routine or understands how text strings in PLAY commands are converted to a MIDI stream? I'm assumin…

    ... disassembly of the MIDI-out routine or understands how text strings ... understand how the MIDI-out routine works we create a new ...
    zxbruno zxbruno September 2009 Development
  • A typical sprite listing to analyse, please?Hi all, Would anyone be interested in helping out with my ongoing Assembly studies by posting up, posting a link to or mailing me a typical sprite l…

    ... , I'm looking for a routine that would show the 'mechanism ...
    Jagd Tiger Jagd Tiger September 2009 Development
  • Dragon Spirit creditsDragon Spirit credits can be more precisely if we include next: Code: Cristian f. Urquhart Grafix: game says P.Johnson ( I sure its database Paul Jo…

    ... Paul "I did Cobra scroll routine" Owens.

    regards
    judasEZT judasEZT September 2009 Infoseek database
  • Renumbering routinesI sometimes modify programs that either I or others have written and sensibly renumber them - usually 10/10, to make future alterations easier and ma…

    ... 3.5 has a handy routine for this, with me only ... have not found a renumbering routine that can handle line numbers ... but is there a renumbering routine which can handle it?
    emleymoor emleymoor September 2009 Sinclair Basic
  • Doubling the Spectrum's resolution?Before the advent of digital, PAL TV sets had a resolution of about 702x576 pixels. It was overscanned (i.e. the edges of the broadcast picture would…

    ... page with an IM2 interrupt routine, it should be possible to ...
    ajmoss ajmoss October 2009 Hardware
  • Implementing goto on error condition...OK, so when I'm reading a file or directory on a network filesystem, when I reach EOF, it's not actually useful at all for ZX BASIC to stop the progr…

    ... I exit the EOF handler routine. There must be something extra ...
    Winston Winston October 2009 Development
  • 2 questions about matrix and string handlingI was never good at understanding how to do something random in Sinclair Basic without repeating something that was already done. Had problems unders…

    ... the hidden words? Does such routine need to check A$ character ...
    zxbruno zxbruno October 2009 Sinclair Basic
  • An idea for a possible(?) new interfaceDue to the Spectrum's processor speed and the way the ULA works, there are a couple things (among others) that are difficult to do: -Gigascreen or a…

    ... things, for example, using the Beeper in certain ways.

    zxbruno zxbruno October 2009 Hardware
  • Tinkering with Quique Llar?a's Midi2Ay tool...Im tinkering with Quique Llar?a's Midi2Ay tool, found at: [url]ftp://ftp.worldofspectrum.org/pub/sinclair/tools/pc/midi2ay-0.1.zip[/url] Im not a v…

    ... trying to understand why the routine crashes after the music stops ... like to add a short routine to stop the playing and ... output (just prior the "finrsi" routine)... The Problem is, I don ... can put after this key routine to get it to return ...
    kgmcneil kgmcneil October 2009 Development
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