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<1234567…34>
  • out (254) - Bright Border[code] ld a,%00000111 out (254),a [/code] The above changes the border to white. Is there a way to set the border to Bright white? Cheers

    [code]
    ld a,%00000111
    out (254),a
    [/code]

    The above changes the border to white.

    Is there a way to set the border to Bright white?

    Cheers
    robpearmain robpearmain February 2007 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 in ... know the AY has midi-out only and can only act ... if we understand how the MIDI-out routine works we create a new ... , just something that works.

    I know how to convert any ...
    zxbruno zxbruno September 2009 Development
  • How the World Works Part 1, Togo Football1. On the 8th January the Togo team bus, en route to a match in the African Nation's Cup in a separatist area of Angola (Cabinda), is machine gunned …

    ... to Injury'.

    Imagine how the world would have reacted ... is the way the world works?
    Jumping Stack Jumping Stack February 2010 Chit chat
  • How to avoid flicking? IM2 help.Hi, I have started on a quest to make a demo for ZX Spectrum. However the display is flickering and I guess it is something about updating at…

    ... someone give me clues/ideas how to make the code better ... /> ldir
    xor a
    out (254),a ; black border
    ret ...
    MartinMSPedersen MartinMSPedersen March 2018 Assembler
  • [Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…

    ... ]:
    [code]
    #define ULA_PORT 254
    #define BORDER_BLACK %00000000
    out (ULA_PORT),a ; Change border color ... this method next to see how well it works!
    ST1 ST1 November 2018 Development
  • converting sna to tapsince i'm struggling to find a simple sna to tap converter that works fine on gnu/linux, i'm about starting to code one on my own (using a scripting …

    ... sna to tap converter that works fine on gnu/linux, i ... working like multiface-1 savings works

    the zxspectrum-basic ... last chunck:
    di
    out 254,bordervalue
    ld bc,1280 ... ) and "R" ($14) means, and how to set "F" register (perhaps ...
    nitrofurano nitrofurano April 2019 Development
  • ZX Spectrum (16K) sound/beepHi all, I think I'm in right place now, I've tried to find an answer how to generate two channel sound using ZX Spectrum 16K. Only think I've found …

    ... a rough idea of how it all works. Basically, sound ... routines work by toggling bit 4 of port 254 ... XOR A ; Zero A.
    OUT (254),A ; Set beeper low.
    OUT (254),A ; Set beeper low.
    Matt_B Matt_B November 2008 Sinclair Basic
  • Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…

    ... 7 ; A = 7
    out (254),a ; Border WHITE
    < ... 2 ; A = 2
    out (254),a ; Border RED
    ... pressed
    in a,(254)
    and a,1 ... are not sure how compare works then think of ... Directives'. These directives help out during assembly and are ...
    ASM ASM November 2010 Development
  • Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …

    ... how it would be stored. The first job was to work out ... final hurdle was to work out how each line was stored. ... /> ld a,1
    out (254),a
    call turbo
    xor a
    out (254),a

    ld ... don't ask me how it works because I haven't ...
    ASM ASM November 2010 Development
  • Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…

    ... exe. I shall explain how it works later in the post. ... a,0
    db 211,254 ; out (254),a

    stack ... />
    ; --------------------------------------------------------------------------
    [/code]

    How does it work?

    ASM ASM November 2010 Sinclair Miscellaneous
  • BUZZSAW+ Demo No. 3Right, another demo of BUZZSAW+. [URL="http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_3.tap"]Joefish_Buzzsaw_Demo_3.tap[/URL] The default con…

    [QUOTE=R-Tape;558338]How close to the bone are ... colour line I do an OUT 254 with one byte from a ... fast as possible. But it works now anyway.
    joefish joefish August 2011 Development
  • Z80 sound enginesI'm looking for a decent sound engine to use in a Z80 program I'm writing, but I've no idea which is the best/fastest/easiest to use. I could do wit…

    ... 24 to go to port OUT 254) for tones, or wholly (or ... the tone. This is how the sound works in [I]Buzzsaw+[/I ...
    joefish joefish September 2011 Development
  • Z80 sound enginesI'm looking for a decent sound engine to use in a Z80 program I'm writing, but I've no idea which is the best/fastest/easiest to use. I could do wit…

    ... 24 to go to port OUT 254) for tones, or wholly (or ... the tone. This is how the sound works in Buzzsaw+. So long ...
    polomint polomint September 2011 Development
  • Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …

    ... chuffed (& suprised) to see how many sprites you can get ...
    ld a,6
    out (254),a
    call screen
    ld a,7
    out (254),a
    call sprites
    defw 19360 ;works fine from here, with screen ...
    R-Tape R-Tape May 2012 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... value is put on port 254 for either a red ... use AND 7 to knock out any bits that aren' ... values into IX and DE works perfectly well, but blitting ... got a handle on how a loader works (it basically boils down ... and taking action depending on how far they are apart), ...
    stephenw32768 stephenw32768 July 2013 Development
  • Getting aquainted with the IF1bisToday, fifteen days after dispatch, the IF1bis arrived at my door. In perfect order. No customs, no TVA and no handling fee involved. The arrival of …

    ... run of a routine. How nice would it be when ... br /> Of course this only works in situations where Interrups are ... /> LD C,A
    OUT (254),A ;sound + border show
    roko roko December 2013 Hardware
  • Snowfall effectHow do you go about creating a snowfall effect like the one in Yeti? Now don't laugh, I'm currently printing 32 UDG's of dots OVER the top of my gam…

    ... Christmas game is in the works?

    Here's one ... the screen, so it depends how you're doing it. Changing ... just to show how long it's taking
    out (254),a
    ld a,7
    out (254),a
    jr mainloop
    R-Tape R-Tape December 2014 Development
  • Alkatraz Protection System - "How to" and compo?I'm thinking about writing a "how to" regarding the [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0020807"]Alkatraz Protection System[/URL].…

    ... />
    I completely missed how [URL="http://www.worldofspectrum.org ... /> 00140 xor a
    00150 out (254),a
    00160 ;
    00170 ... and the congratulations sequence now works OK:
    [youtube]Sn8l_SodUDw ...
    jp jp December 2014 Announcements
  • Making sound using the BEEPER in AssemblyI had a look at the the documentation but it doesn't make sense to me. To make music just the beeper all I have to do is send ones and zeros to one o…

    ... the code it sort of works. I basically I imagine ... computer simply spits these out via OUT 254. I understand the DI ... /> LD A,(HL)
    OUT (254),A
    INC HL
    I think this works but it's far too ... it kind of does. How do I make it longer ...
    ivanb303 ivanb303 July 2018 Assembler
  • OUT to file, IN from fileOUT - sentences won't do much on emulators since they mostly communicate with external devices. If there was an emulator that would write the (last) …

    ... would write the (last) OUT-ed value to a file ... standard IO-device that uses OUT 31 to light up some ... could write to file 31.OUT the value of what ... was OUT-ed and in another ... building the hardware.

    OUT 254 (from tape) might be handled ...
    Dr BEEP Dr BEEP August 2002 Emulators
  • X-Out level loaderCan anyone confirm all the levels of this game (the original game tzx) will load? Does anyone want to find how the checksum works?

    Can anyone confirm all the levels of this game (the original game tzx) will load? Does anyone want to find how the checksum works?
    Fraser Fraser September 2003 Emulators
  • "TommyGun" gets a complete MAKEOVER for next release ...From the author, Tony Thompson ... """""""""""""""""""""""""" [B][I] I hadn't worked on the TommyGun editor for while. But when I got sick (about …

    ... .

    TommyGun works now by loading editor plugins ... particulars of an image out into the Palette and ... but I took that support out of my version. It ... SDK when I put out the next version of ... write it without knowing how it all works. Its just so ...
    Sadako Sadako April 2004 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…

    ... a technical overview of how the engine works. Eventually I will write ... learn a lot about how the machine works and this will make ... struct sp1_ss will now reveal how many sprite characters are active ... splib2. This is to help out with 3d isometrics.

    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • Battle MetalTo all you metalheads out there: Check out a Finnish band called Turisas. Good solid metal. Seen them live at Birmingham and just had to have the …

    To all you metalheads out there:

    Check out a Finnish band ... listen and you'll know how well it works.
    DEATH DEATH November 2006 Chit chat
  • ZX Spectrum and (real) B A S I CSometimes ago there was a thread "how spectrum changed your lives". Another thread dealt with "how to copy spectrum screens using basic not using co…

    ... Another thread dealt with "how to copy spectrum screens ... this I what I found out:

    ZX ... languages to understand how "Visual Basic" works.
    In ... to see that it works and will learn about. ... a very little how their PC works or how to program ...
    ingo ingo October 2007 Sinclair Miscellaneous
  • splib2 from ROMI'm trying to generate IF2 ROM games for ZX Spectrum 16K using z88dk + splib2. So far I've managed to create a new crt0 file and to generate valid RO…

    ... deal, I can do the out 254,0 myself), sp_AddMemory, sp_CreateSpr, sp_AddColSpr ... an any point?

    * How do I especify I want ...
    na_th_an na_th_an December 2007 Development
  • Thoughts on RZXing ( + pot. feature req.)Hope I'll be able to put my thoughts coherently enough here, am just thinking out loud. I've become a bit addicted to RZXing ... not games, per se, …

    ... enough here, am just thinking out loud.

    I've ... currently working on making a how-to tutorial on PGD games ... what not to do (how the prog works, creating tiles that match ...
    ZnorXman ZnorXman October 2008 Emulators
  • I-Tune$....a rant.I'm thinking of buying an I-pod as I have a massive cd collection and I'd like to take it out and about with me. I have a 6gig MP3 player, but that's…

    ... 'd like to take it out and about with me. I ... one will know, it only works with I-Tune$. I've ... could be wrong with how I-tune$ works, but it's set ...
    Bermondsey Bob Bermondsey Bob October 2008 Chit chat
<1234567…34>

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