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<1…16171819202122…34>
  • TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…

    ... .png[/img]
    Trigger (vertical mark), at start of PAL ... /> - Line #3 Horizontal Sync (noticed vertical trigger mark "black arrow", pointing ... And finally, here is the Vertical Sync, after PAL line #306 ... looking to be around 4 lines width instead of 8.
    RMartins RMartins August 2015 Development
  • Newbie Hardware QuestionsI just recently aquired my first Spectrum, a +2, and I'm in the process of getting acquainted with it. Being a newbie I had some questions, which …

    ... Ohm resistors on the RGB lines, but its a little in ... 's also a lot of vertical bar noise with this coverter ... combining the BRIGHT and RGB lines in the cable as it ...
    Questarian Questarian August 2015 Hardware
  • Help!!! Loading problems.Hey guys. Just got my first spectrum sonce I was a kid. It's a 128k + toastrack. Was hoping to load tzx files from my phone. I've tried 3 different c…

    ... files into my Spectrums (128K toastrack & +3). These were converted ... , I got the occasional loading lines problem you describe earlier
    textvoyage textvoyage August 2015 Hardware
  • 1985-2015.A topic where we can review games released on the Speccy 30 years ago, or, anyway, talk about that year.

    ... vertical shoot'em up where you must advance through the enemy lines ...
    JuanF. Ramirez JuanF. Ramirez September 2015 Games
  • 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…

    ... frame while scrolling? Actually during vertical scrolling you don't have ... from the 2nd line. Draw lines to the end of buffer ...
    Ralf Ralf September 2015 Development
  • z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…

    ... as 0 and then two lines of code were being to ... it.
    ld a,(ycoord) ; vertical position.
    rst 16 ; print ... coords.
    ld hl,ycoord ; vertical position.
    dec (hl) ; ... it.
    ld a,(ycoord) ; vertical position.
    rst 16 ; print ...
    antonyjones101 antonyjones101 September 2015 Development
  • z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…

    ... x, y; where x is vertical and y is horizontal" instead ... as 0 and then two lines of code were being to ...
    lunarul lunarul September 2015 Development
  • Angles and blocksHelp! Sprites! Blocks! Angles! I have a sprite that has a choice of 64 angles, and want it to deflect on collision with blocks. http://i1142…

    ... -based system, using those diagonal lines like a laser for instance ... assume first-off either a vertical or horizontal wall. You exchange ...
    joefish joefish September 2015 Development
  • Angles and blocksHelp! Sprites! Blocks! Angles! I have a sprite that has a choice of 64 angles, and want it to deflect on collision with blocks. http://i1142…

    ... -based system, using those diagonal lines like a laser for instance ... assume first-off either a vertical or horizontal wall. You exchange ...
    Einar Saukas Einar Saukas September 2015 Development
  • Angles and blocksHelp! Sprites! Blocks! Angles! I have a sprite that has a choice of 64 angles, and want it to deflect on collision with blocks. http://i1142…

    ... of pixels instead of detection lines). Now F will be center ... , but if you only have vertical and horizontal walls, you will ...
    Einar Saukas Einar Saukas September 2015 Development
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... about duplicate pic of the toastrack : ignore it!. The second pic ... the result that the PCB lines are etched into the side ... be seen that these PCB lines have been etched into the ...
    harriusherbartio harriusherbartio October 2015 Hardware
  • Ninjaman 8-way scrolling 50Hz multicolour demo :-)Here's a demo I've been working on for a while. The goal was to make the best scrolling routine possible on a humble 48K ZX Spectrum. I was origin…

    ... every 8 lines, but you get to pick the vertical start position ... , which is what allows vertical scrolling. It [i]may[/i ...
    Kayamon Kayamon November 2015 Development
  • Some downloads fail meI want download the schema of the Spectrum +2A and I can not because appears a user and password request in all links of "SCHEMATICS, MANUALS AND TEC…

    ... don't believe because the vertical synchronism has 50 hz but ... load of save in the lines of the border of the ...
    DAVID BRUNNER DAVID BRUNNER November 2015 Hardware
  • Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…

    ... / brightness / contrast settings.

    Vertical banding (like shown in 2nd ... in video encoder / ULA supply lines. A suitable coil in series ...
    RetroTechie RetroTechie December 2015 Hardware
  • Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…

    ... options.[/quote][quote="RetroTechie;843635"]Vertical banding (like shown in 2nd ... in video encoder / ULA supply lines. A suitable coil in series ...
    1024MAK 1024MAK December 2015 Hardware
  • Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…

    ... white border, black screen with vertical white lines running down. The sync ...
    kenwonders kenwonders January 2016 Hardware
  • Black screen on 48k+Hello peeps Just bought a 48k+ was working fine then after leaving it off over night I turned back on to get a total black screen, no border etc. …

    ... . Do you see thin vertical red lines on the black screen? Does ...
    1024MAK 1024MAK May 2016 Hardware
  • Small batch of ZX-Unos outside SpainI am a member of the ZX-Uno team. We have launched a sucessfully crowdfunding campaign of 250 ZX-Uno, but they are all sold (mostly in Spain). I apol…

    ... />
    PAL uses 625 scan lines, and NTSC uses 525.
    vertical hold and just deal with ...
    andydansby andydansby May 2016 Sales
  • A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…

    ... the asm stuff. The compile lines are listed at the top ...
    unsigned char dy; // signed vertical speed in pixels
    };
    Alcoholics Anonymous Alcoholics Anonymous June 2016 Development
  • P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…

    ... )??
    [b] Any thoughts concerning Vertical sections (ladder climbing isn't ... />
    Sitting on the side lines for now... ;)
    kgmcneil kgmcneil June 2016 Development
  • P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…

    ... numbers :D

    10 vertical 16x16 tiles, I can relate ... would be the number of lines, for 20 chars height.
    lines!


    Sprites 40x40 ... pixels = 5 pixel bytes * 40 lines = 200 Sprite pixel bytes
    RMartins RMartins June 2016 Development
  • Magenta border and black screenGot my hands on a issue 3 48k machine. Did the initial resistance checks and everything seemed in order buy when I switch the machine on all I get is…

    ... memory. On screen you get vertical red lines.

    But from ...
    1024MAK 1024MAK September 2016 Hardware
  • Meddling with the RGB signal - any experts out there?A few questions, if anyone knows - is it OK to split the A/V signal and feed it to two TVs? I'm assuming that it's not OK to do this with the RGB …

    ... put out HSynch and VSynch lines, but I didn't realise ... of the blanking or function lines (this was on a Playstation ... interesting is that in the toastrack cable, BRIGHT has to be ...
    joefish joefish October 2016 Hardware
  • Shimmering displayHi all, I've got a 48K issue 4S and it appears to be working apart from it's displaying weird vertical shimmering patterns. It passes a RAM test t…

    ... , it affects mostly the first vertical line of a character and ... to be brightness on alternate lines in coloured blocks. I'd ...
    Jet5y Jet5y November 2016 Hardware
  • how to load machine codeI'm reading Jon Caldwell's how to write Spectrum games but can't enter the code! Here's an example:_ LD BC, (score) Call 6683 I tried putting…

    ... - what you get is two vertical dotted lines.

    So i ...
    mik3d3nch mik3d3nch December 2016 Sinclair Miscellaneous
  • Fast way to clear the screen ?So I was wondering fastest way to clear the screen. I've tried this and this works but is it better than CLS ? LD HL,16384 LD BC, 6144 Loop…

    ... cases (like vertical, horizontal and 1:1 diagonal lines, lines with a length ...
    GReW GReW December 2016 Assembler
  • Comp.Sys.Sinclair Crap Games Competition 2017As the creator of the second-least crap game in last year's competition (and the only mug stupid enough to agree to host it this year) I am proud/ash…

    ... line 10, and the lines from 9000 onward. Note ... bytes into memory. So lines 9130 and 9140 POKE in ... machine code.

    Lines 9140 and 9150 POKE just ... you want to add lines that POKE data to ... /> 40 REM Example of Vertical Attribute Scroll
    50 ...
    joefish joefish January 2017 Games
  • Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …

    ... this . RS was along the lines of : Tracopower Switching Regulator 6 ... leave the order for my Toastrack 128k Tracos for another time ...
    harriusherbartio harriusherbartio April 2017 Hardware
  • Spectrum Next in the ArchiveWhen the Spectrum Next is launched, should it be added to the archive, and games archived as per usual WoS usage? There are a lot of new games annou…

    ... ROM SOS48 and vertical screen resolution of 192 lines, and the horizontal ...
    Black_Cat Black_Cat May 2017 Hardware
  • Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …

    ... with it.on the first Toastrack 128

    It all ... . There is still one more Toastrack to do . Then I will ... . There is a bit of "vertical" greening effect on the left ... hand vertical line on the 128 screen ...
    harriusherbartio harriusherbartio May 2017 Hardware
<1…16171819202122…34>

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