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<1234567…34>
  • help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…

    ... ve based it around the pixel scrolldown routine in 40 Best ... />
    [code];scroll down 1 pixel at a time
    org ... /> ld (hl),a ;. . .to next pixel line down
    ld a,c ... scrlcount ;otherwise continue with another pixel scroll
    endroutine
    ...
    bigjon bigjon February 2008 Development
  • Name the game(s)Another thread reminded of this compilation that had one of the most addictive games ever that had me and my brother playing for ages. I'm sure the …

    ... with a very simple 1 pixel line for each bike, a plain ...
    Tobo Tobo August 2004 Games
  • RGB on speccy ?hi, just a question : are you aware of scene demo trying emulate rgb ? i was a bit ill last few days so laying in bad i come with a (stupid ?) idea.…

    ... which sets ink in each pixel line to RED, BLUE or GREEN ... )
    2) assume the RGB pixel is 4 points wide. so ... />
    blue line 1100
    red line 1110
    green line 1000
    (black line for 4x4 ...
    Fikee Fikee November 2008 Development
  • Precisely timed loops in assemblyI'm looking for a way to make my code stop until the raster has reached the lower screen border (right after having drawn the last pixel line). I und…

    ... after having drawn the last pixel line). I understand that I should ...
    na_th_an na_th_an February 2012 Development
  • Very weird +2 problem.After two days, I'm still fighting this grey +2. Symptoms: When I first got it, there were stray pixels on the screen, and stray lines and colours. …

    ... letter in the top text line turns into a yellow square ... graphics corruption. For instance, one pixel line from the copyright message on ... will be copied into the line above. Put the other JetPac ...
    Spirantho Spirantho August 2012 Hardware
  • BIFROST* for graphic artists - part 1Using multicolor requires 2 very different skills: [I]programming[/I] and [I]graphic design[/I]. I already wrote several tutorials about the former …

    ... different INK/PAPER colors per pixel line, so you could improve the ... and you will notice each "line" of 8 pixels has a ...
    Einar Saukas Einar Saukas March 2013 Development
  • Chronos (BUGFIX)Please add the following "known errors" entry to [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0000951"]Chronos[/URL]: [QUOTE]Bugfix provid…

    ... br /> ld b, 128 ; 128 pixel lines

    58434: REPT ... br /> sbc hl,de ; next pixel line address
    djnz 58434[/CODE ... br /> ld b, 128 ; 128 pixel lines

    58431: ...
    Einar Saukas Einar Saukas May 2013 Infoseek database
  • IZX: a new standard format and driver for ZX-Spectrum icons[B]IZX[/B] is a very compact and efficient standard format to create icons for the ZX-Spectrum. You can download it from here: [LIST] [*][URL="http:…

    ... screen,
    with an additional pixel line/column in every direction. This ...
    Einar Saukas Einar Saukas July 2013 Brand new software
  • 20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…

    ... />
    Existing routines write each line of attributes just before the ... ULA is rendering that first pixel line, we're just behind it ... slightly later for each successive line. If we start the first ... up and redrew the magenta line (see columns 12-13) before ...
    gasman gasman July 2013 Development
  • BIFROST* for graphic artists - part 2: static tilesThis tutorial provides some guidelines for designing multicolor tiles. Before reading this text, it's strongly recommended that you (re-)read [URL="h…

    ... 15x15 pixels, leaving an empty pixel line at the top, and another ... Buzzsaw typically leave an empty pixel column on the right ... or bandana) and an empty pixel line at the top (although it ... http://www.yarrninja.com/pixeltutorial/"]pixel art tutorial[/URL]. But ...
    Einar Saukas Einar Saukas August 2013 Development
  • Collision detection for interlocking shapes[SIZE=3][FONT=Calibri]I?m looking for some advice as I?m not sure how to resolve the following problem. I have an in memory structure that holds info…

    ... attributes and not as a pixel / line representation.[/FONT][/SIZE]

    Mr Millside Mr Millside October 2013 Development
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... 8x1" (an attribute for each pixel line, i.e. each block of ... " (an attribute for every 2 pixel lines, i.e. each block ...
    Einar Saukas Einar Saukas November 2013 Brand new software
  • Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …

    ... is closest, and the pixel line upon which it falls within ... bits which determine the pixel position. The instruction AND ... are further divided into pixel lines 256 bytes apart, ... display.
    ld d,a ; line * 256.

    [ ...
    Jagd Tiger Jagd Tiger April 2014 Development
  • Could use some help improving some controls.Back when Dingo was released many people said they had problems controlling it, so I've decided to improve the controls on it, so you no longer need …

    ... lined up with the one pixel line where you can move - so ...
    Sokurah Sokurah July 2015 Development
  • Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…

    ... offset and move up a line as explained here:

    pixel line above. This continues for another ... address to move to the line above. Which is the quickest ... at the end of a line to create the offset.
    Atari_Jetman Atari_Jetman September 2015 Development
  • New NIRVANA tool: WTF!"[b]WTF![/b]" (Wide Tile Format converter) is a command-line tool to convert multicolor file formats from [b]btile[/b] (bicolor tile) to [b]wtile[/b]…

    ... Format converter) is a command-line tool to convert multicolor file ... [/b] at any arbitrary even pixel line, smoothly moving (or animating) this ...
    Einar Saukas Einar Saukas May 2016 Brand new software
  • Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …

    ... attribute first, then the 8 pixel lines for that character square ... based, attribute first, then 8 pixel bytes

    org ... byte
    inc h ; next pixel line down
    ld a,h ... /> nextpix: inc ixh ; 08ts ; next pixel down
    ld a, ixh ...
    FrankT FrankT February 2017 Assembler
  • line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…

    ... br /> ;
    ; Draw a pixel line from (x0,y0) defined (H, ... /> ; ******************************************************************
    ;
    ; Get absolute pixel address in map of virtual ...
    rtunes rtunes October 2001 Sinclair Miscellaneous
  • line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…

    ... pixel address.
    Anyway if we want an horizontal line ... br /> ;
    ; Draw a pixel line from (x0,y0) defined (H, ... />

    ; ******************************************************************
    ; Plot pixel at (x,y) coordinate.
    rtunes rtunes October 2001 Sinclair Miscellaneous
  • ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…

    ... />
    ld hl,04100h ; second pixel line address in hex
    ld ... de,04000h ; first pixel line address in hex

    pixel is reset
    ; replace and ... is trickier when dealing with pixel scrolls -
    ; it would ...
    Anonymous Anonymous June 2002 Games
  • Parasol Stars for Spectrum Having played a lot of Bubble Booble and Rainbow Islands on Spectrum, and later on also Rainbow Islands and Parasol Stars on Amiga, I feel like it w…

    aww, very cute :) I suppose it's entirely impossible for speccy to do that 2 colours per 8 pixel line effect in a game tho..
    b00mzi11a b00mzi11a July 2003 Games
  • Any Errors?Any errors you feel Sinclair Research or even Amstrad made with the speccy??

    ... H takes you down one pixel line and INC L takes you ... right one pixel line (assuming you don't hit ... of a character square or line).

    After 32 INC ... 're using for the second pixel row of the first character ...
    Philip Kendall Philip Kendall March 2004 Sinclair Miscellaneous
  • FAST PIXEL DRAWINGI'm looking for the fastest way to put a pixel to the screen (on spectrum ofcoz:). Here is my own procedure (written in PASMO). But I don't how do it…

    ... HL points to a 8 pixel chunk, INC L moves you ... H moves you down a pixel line, there's essentially no other ...
    Philip Kendall Philip Kendall July 2004 Development
  • Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …

    ... - right border for every pixel line (one line takes 224t, drawing one bzte ... 192. during this time (drawing pixel part of screen, not left ...
    Fikee Fikee August 2004 Development
  • On 48k, can I copy 4k before next screen updateFollowing on from my thread at [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=6423&forum=11"]http://www.worldofspectrum.org/forums/v…

    ... chaotic fashion, with one line up top, then down ... see shearing on several pixel lines as a result.< ... is do the copy in pixel line order. This is easy ... at most see one line with a glitch when ... this time before starting your pixel-line order copy, you will ...
    Alcoholics Anonymous Alcoholics Anonymous September 2004 Development
  • "Sinclair Zx Spectrum: Absolutely Better Than Commodore 64"Did you ever read this? [url="http://www.alfonsomartone.itb.it/fztsmo.html"]http://www.alfonsomartone.itb.it/fztsmo.html[/url]

    ... it can shift on a pixel line by pixel line basis vertically and [B ...
    TMR TMR July 2005 Games
  • "Sinclair Zx Spectrum: Absolutely Better Than Commodore 64"Did you ever read this? [url="http://www.alfonsomartone.itb.it/fztsmo.html"]http://www.alfonsomartone.itb.it/fztsmo.html[/url]

    ... it can shift on a pixel line by pixel line basis vertically and [B ...
    ivarf ivarf July 2005 Games
  • "Sinclair Zx Spectrum: Absolutely Better Than Commodore 64"Did you ever read this? [url="http://www.alfonsomartone.itb.it/fztsmo.html"]http://www.alfonsomartone.itb.it/fztsmo.html[/url]

    ... it can shift on a pixel line by pixel line basis vertically and [B ...
    AndyC AndyC July 2005 Games
  • The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …

    ... one colour attribute per 8 pixel line.

    ie, set attr ...
    Dunny Dunny November 2005 Hardware
  • Loading schemes18 years ago I hated loading schemes like Alcatraz and Speedlock because they were a b*tch to copy and became unreliable when the tape got older. Now…

    ... brought up the screen one pixel line at a time and the ...
    JonNorth JonNorth May 2006 Games
<1234567…34>

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