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Search Again :: Adv Search 1000 results in 0.014s
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  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... raster draws the screen one line at a time, so you ... to be drawing areas a pixel row at a time...[/QUOTE ... "to be drawing areas a pixel at a time". I would ...
    TVzombie TVzombie February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... the memory address or a pixel look rather complicated, and I ... simple to work out any pixel's address and BIT value ... complicated[/QUOTE]
    The bottom line is it is UNNECESSARILY complicated ...
    TVzombie TVzombie February 2011 Sinclair Basic
  • Spectrum 128 on modern (plasma) TVHello gang! So I want to hook up my 128 to my new Panasonic plasma TV via Scart-RGB, but the picture keeps shifting from left to right. Anyone had s…

    ... weird - I get a single pixel of colour wherever there's ... blue I get a single pixel wide line of blue at the ...
    joefish joefish February 2011 Hardware
  • Spectrum 128 on modern (plasma) TVHello gang! So I want to hook up my 128 to my new Panasonic plasma TV via Scart-RGB, but the picture keeps shifting from left to right. Anyone had s…

    ... weird - I get a single pixel of colour wherever there's ... blue I get a single pixel wide line of blue at the ...
    gtsamour gtsamour February 2011 Hardware
  • Smooth (vertical) scrolling on ZX SpectrumI was just thinking about this. You know, you have systems like Atari 2600 or Sega SG-1000 that have no hardware scroll, but they have games that sti…

    ... colour attribute data, not its pixel data.

    Instead of ... having a pixel screen, imagine the Speccy had ... move things around in 8-pixel character squares. But you could ... data. So it can handle line drawings or anything in pixels ...
    joefish joefish February 2011 Games
  • Smooth (vertical) scrolling on ZX SpectrumI was just thinking about this. You know, you have systems like Atari 2600 or Sega SG-1000 that have no hardware scroll, but they have games that sti…

    ... -writing the attributes on each line of the screen.

    pixel at 25 frames a second ... poke, it moves at 1 pixel at 50 frames a second ...
    joefish joefish February 2011 Games
  • Flip Screen vs ScrollingWhich do you prefer? I've always liked flip screen games but I had a C64(spit) owning friend who hated them with a passion.

    ... .

    To scroll 1 pixel vertically, you just need to ... everything down (or up) one line (which just involves moving the ... (32 bytes). To scroll 1 pixel horizontally you need to do ...
    ccowley ccowley February 2011 Games
  • Recommend a dev environmentIt's been a while since I last wrote any Z80 assembler - must be over 20 years, and since I wrote any spectrum Z80 assembler more like 25 years. I n…

    ... need is to draw a line. Including the whole set of ... all its dependencies like calculate pixel address, modify screen address by ...
    Alcoholics Anonymous Alcoholics Anonymous March 2011 Development
  • Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …

    ... clear from the screenshot, each 'pixel' is a 4x4 block containing ... attributes between the start of line 3 and the end ... of line 5, and another one ... between the start of line 4 and the end ... the start/end of the line is taking the optimistic view ...
    gasman gasman March 2011 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…

    ... of the screen, a vertical line, it's duplicate of its ... !!!!Thats a real time 2 pixel width mirroring effect :-)

    Anestis Anestis April 2011 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…

    ... of the screen, a vertical line, it's duplicate of its ... can't see any extra pixel columns. Can anyone else see ...
    joefish joefish April 2011 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…

    ... into a grid of 16x16 pixel blocks, and each block is ... />
    Now on any one line, that means there are four ... in preparation for rendering each line of the screen, which still ...
    joefish joefish April 2011 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…

    ... pointer mid-way along each line, such that it becomes a ... pre-shifting for a 2-pixel scroll.
    joefish joefish April 2011 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…

    ... set of graphics for each pixel row. Using the hidden screen ... the first row of every line of blocks in one (unrolled ... border to hide an 8-pixel shift is smart and practical ...
    joefish joefish April 2011 Development
  • Small Machine Code Routines Which Maybe UsefulAs part of creating Flynn's Adventure in Bombland I created a lot of little routines to do all sorts of things. A lot of these I created based on inp…

    ... **********************************
    ; xy coords to screen pixel position
    ; **********************************
    ld ... - down another for next line
    dec l; 4t ... ; 13/8t (1183t per char line)
    ; *************************************
    ...
    kgmcneil kgmcneil April 2011 Development
  • Put off by the Spectrum character setAm I the only one? Someone suggests a game, and you go "Ooooo haven't heard of that one, I'll give it a sho...*recoils in horror at the ZX Spectrum c…

    ... WPF and DirectWrite use sub-pixel positioning to get the font ... like it should regardless of pixel layout. Changing the behaviour of ... where developers are expecting the line breaks to happen at certain ...
    AndyC AndyC May 2011 Games
  • Put off by the Spectrum character setAm I the only one? Someone suggests a game, and you go "Ooooo haven't heard of that one, I'll give it a sho...*recoils in horror at the ZX Spectrum c…

    ... like it should regardless of pixel layout. Changing the behaviour ... where developers are expecting the line breaks to happen at ... different things I notice. Sub-pixel *positioning* is indeed not ... possible in GDI. Whereas sub-pixel *rendering* of type (called ...
    Paul van der Laan Paul van der Laan May 2011 Games
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... each word until the next line, then 42 chars for granted ... . If you assume the average pixel width is 4 (only M ... on the assumption that a line could be 64 characters as ...
    Paddy Coleman Paddy Coleman May 2011 Sinclair Basic
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... code to do a 12-pixel deep typeface:

    [img ... the other hand the top line in the above demo was ...
    chev chev May 2011 Sinclair Basic
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... code to do a 12-pixel deep typeface:

    [img ... the other hand the top line in the above demo was ... I prefer the original 24 line option as screen real estate ...
    Paddy Coleman Paddy Coleman May 2011 Sinclair Basic
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... 's more pixel space at the end of the line than there ... are words in the line then linewrap temporarily adjusts the ... that when PropSys prints the line it gets padded out.
    line, which is why I haven ...
    Battle Bunny Battle Bunny May 2011 Sinclair Basic
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... to use a simple 8 pixel font and you only print ... a faster.]

    The line "DEC DE" in my fix ...
    Timmy Timmy May 2011 Sinclair Basic
  • Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…

    ... .
    Options in the demo line 935 are:
    [code]
    pixel
    JR chkspc ; 64094 24 ...
    Battle Bunny Battle Bunny May 2011 Sinclair Basic
  • Last few attribute challengeI'm likely to be away a bit today and not answer for ages so the filename is the answer (so no cheating unless you're really stuck) :) I don't think…

    ... pics include 1 vertical line of the real pixel data per character ...
    FrankT FrankT May 2011 Games
  • CrusoeI'm making slow progress in mapping & debugging this game, having to restart several times due to various unfortunate events. The latest was getting …

    ... line like this: "1 red pixel, 1 red pixel, 1 red pixel, 1 red pixel ... , 1 red pixel, 1 blue pixel, 1 blue pixel ... , 1 blue pixel ...
    Vertigo Vertigo June 2011 Games
  • GTA IV vs Earlier GTA gamesOne of the regular discussions (or arguments, depending on the age of the participants - how I wish no one under twenty could post on the forums :() …

    ... 't perfectly in your exact pixel perfect line of vision :D
    dm_boozefreek dm_boozefreek June 2011 Chit chat
  • GTA IV vs Earlier GTA gamesOne of the regular discussions (or arguments, depending on the age of the participants - how I wish no one under twenty could post on the forums :() …

    ... 't perfectly in your exact pixel perfect line of vision :D
    ewgf ewgf June 2011 Chit chat
  • Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…

    ... say your drawing your 4 pixel wide paddle, using a loop ... ?... If your only moving 1 pixel at a time, then its ... 's or raster line drawing rather than drawing each pixel individually.. For ...
    kgmcneil kgmcneil June 2011 Development
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... 'm using 32-bit per pixel for RGBA value. Yours may ... for 8 bits in the 'pixel', if it's set (1 ... RGBA value of the backbuffer pixel to the equivalent ink colour ... 4 till last speccy display line is done
    6) Colour ...
    Arjun Arjun June 2011 Emulators
  • Copyright questionIf I was to recreate the Miner Willy sprite for use in my own game would that infringe on copyright?

    ... world for stealing a 128-pixel sprite, there'll be 100 ... those 100 people for skipping line while I'm at it ...
    Sokurah Sokurah June 2011 Sinclair Miscellaneous
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Latest Posts

  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
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    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
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