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  • Fast Binary to Text DisplayI've done this thing that takes some memory contents and converts it to a Binary version of 0's and 1's on screen. However, I've no idea what to use …

    ...
    You're using 4 pixel wide characters (3 pixels with ... that top and bottom rows are the same for ... for the top and bottom rows of 2 characters, the ... You fill in 2 more rows from the bottom upwards. If ... filling in the bottom two rows of the 1.
    ...
    thricenightly thricenightly December 2017 Development
  • Proportional-width fontsFor reasons that are still not quite clear to me (because I’ve always loved typography and design,) I never bothered to write a proportional-font rou…

    ... can be changed to do pixel precise clipping to arbitrary rectangles ... window (it uses a supplied pixel window for rendering), so it ... ]. The structure begins with a jump to the draw function so ...
    Alcoholics Anonymous Alcoholics Anonymous January 2018 Development
  • 1988-2018..OK This feels a little odd since it's always WhenIWasCruel who does these threads, but I've had the proxy approval from the man himself to go ahead a…

    ... here is somewhat distorted (missing pixel rows/columns), you can easily see ...
    XTM of TMG XTM of TMG March 2018 Games
  • Loading Images/Screens mid-gameHi all, Looking to get back into a bit of coding and I couldn't figure out a way to do the following: I have an image/SCREEN that I'd like to b…

    ... to restore the example 10 rows * 24 cols area; the timer ... +1,p+1): REM copy pixel row from a$() to screen ... ,p+1)=s$: REM copy pixel row from screen to a ...
    Battle Bunny Battle Bunny April 2018 Sinclair Basic
  • TV for ZX SpectrumPlease select your TV type

    ... would occasionally jump from side to side, only by a pixel or ...
    The Mighty Dopethrone The Mighty Dopethrone May 2018 Sinclair Miscellaneous
  • TV for ZX SpectrumPlease select your TV type

    ... would occasionally jump from side to side, only by a pixel or ...
    guesser guesser May 2018 Sinclair Miscellaneous
  • How to stop a flickering character erasure?I'm trying to figure out how to build a moving sprite. Eventually it will be made up of several UDG's. However its early days yet so I'm experimentin…

    ... then shift the graphic 1 pixel to the right and that ... 8th frame is shown we jump 1 char to the right ...
    ASH-II ASH-II May 2018 BASIC
  • How to stop a flickering character erasure?I'm trying to figure out how to build a moving sprite. Eventually it will be made up of several UDG's. However its early days yet so I'm experimentin…

    ... then shift the graphic 1 pixel to the right and that ... 8th frame is shown we jump 1 char to the right ...
    mik3d3nch mik3d3nch May 2018 BASIC
  • im looking for a fill routine written in basici know this would be slow but i want to tinker with it to produce something else.

    ... right-to-left, leaving one pixel to the right.
    ... right-hand-edge and jump in by an increasing ... moves left at least one pixel. But the sum in ... It's more efficient to jump the drawing point left in ... to work through each pixel individually and decide whether ...
    joefish joefish July 2018 Development
  • Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…

    ... , changing attributes as each vertical pixel line is drawn. So only ... . The full size is 23 rows and as you can see ... ). Reducing the number of active rows means more time is left ...
    Alcoholics Anonymous Alcoholics Anonymous October 2018 Brand new software
  • Proportional-width fontsFor reasons that are still not quite clear to me (because I’ve always loved typography and design,) I never bothered to write a proportional-font rou…

    ... a ;reduce by 1 pixel, so glyphs flush with ... to leave at least one pixel
    ;of right ... coord: three low bits=pixel position (0-7) within ... ;skip the rigmarole and jump straight to the next ... ex af,af' ;restore pixel position (number of shifts) into ...
    Ast_A_Moore Ast_A_Moore December 2018 Development
  • Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…

    ... registers), with a self-modifying jump to step either to the ... or to the left one pixel whenever the stepping algorithm demands ... routine that works in 2-pixel horizontal steps to draw long ...
    joefish joefish March 2019 Development
  • Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…

    ... Elite-style interleaved transfer - odd pixel rows ahead of the beam, then ... immediately even rows behind the beam. The buffer ...
    Lethargeek Lethargeek March 2019 Development
  • New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…

    ... /> -b1 @ top left of screen pixel area
    -b2 @ bottom right ... of screen pixel area
    -b3 @ space in ...
    TomD TomD May 2019 Development
  • New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…

    ... of page/bank 7 and jump to there
    17) Copy ... : @16384 (top left of screen pixel area)
    2: @22511 ( ... bottom right of screen pixel area)
    3: @23296-23552 ... located top left of screen pixel area
    all outputed ...
    TomD TomD May 2019 Development
  • 50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…

    ... the PUSH buffer for every pixel line? You should re-use ... buffer to do all the pixel rows in one row of scenery ...
    joefish joefish June 2019 Development
  • Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…

    ... doing the POPs during the pixel-rendering time and the PUSHes ... copying more bytes over two rows; you have to copy attributes ... .g. 30x16 characters with 8x2 pixel attributes.

    You ... might only want 8x4 pixel attributes, but because of the ...
    joefish joefish August 2019 Development
  • how do i make a character rotate in very small degrees?so i would take the letter a and rotate it degree by degree until it has gone round 360 degrees. only 8x8 pixels is necessary. machine code or basic …

    ... of your graphic, then shifts pixel rows left or right to horizontally ... able to skip or duplicate rows and columns as you go ... then add it to simple pixel-by-pixel 90° rotations of the ...
    joefish joefish September 2019 Development
  • What to write / programme?I've been trying to get back some motivation to write something in machine code for the Spectrum. I don't feel I am organised enough to write somethi…

    ... (four iterations) repeats these two pixel lines four times to fill ... a depth of 8 character rows. Then finally the outermost loop ...
    dmsmith dmsmith April 2020 Development
  • Free/cheap gamesJust found GOG are giving away Torchlight until 20 June 19.59 GMT [url]http://www.gog.com/[/url] And this lot are giving you a load of games includi…

    ... slightly off by a few pixel rows, nothing gamebreaking, but noticeable! Also ...
    dm_boozefreek dm_boozefreek May 2021 Chit chat
  • Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…

    ... row using a 256/512 pixel width (or 32/64 chars ... />
    40 columns x 25 rows = 1000 bytes. These are stored ...
    merman merman October 2021 Hardware
  • Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…

    ... row using a 256/512 pixel width (or 32/64 chars ... />
    40 columns x 25 rows = 1000 bytes. These are stored ...
    Luny Luny October 2021 Hardware
  • Easiest way to figure instruction lengthGiven a start address, what is the easiest way to find out instruction length at that address in Z80? I found [url="http://www.z80.info/decoding.htm"…

    ... is the number of ports (rows) to check
    LD ... is the number of ports (rows) to check
    LD ... is the number of ports (rows) to check
    LD ... br />
    Now we jump to this block. It executes ... Because I trap every jump I can change the ...
    tstih tstih March 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... is aligned to an 8 pixel width column and use a ... hl, tbl_rows ; base coords of rows
    ld d, 0
    Paradigm Shifter Paradigm Shifter June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... is aligned to an 8 pixel width column and use a ... hl, tbl_rows ; base coords of rows
    ld d, 0
    Kotek Kotek June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... it's after an unconditional jump

    cltoe31
    ; draw ... EXECUTED THOUGH
    ; DO NOT JUMP OUT OF CALLED ROUTINES SKIPPING ... nc,cltoe31 ; AND this would jump out of the routine ignoring ...
    Paradigm Shifter Paradigm Shifter June 2022 Development
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... per pixel, so uses a 48 byte table (24 rows * ... 32
    ; l = pixel y-coord (cell coord, not ... pixel coord)
    ; c = pixel x-coord/8 ... 7
    ; blit 16 pixel rowdata to screen in cells ...
    ; blit 16 pixel rowdata to screen in cells ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
<1…13141516171819…34>

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