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Search Again :: Adv Search 1000 results in 0.027s
<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…

    ... second-to-last pixel line. Is that because we ... which means if the TV raster catches a glimpse of ... the middle of the screen has scrolled but some ... the beginning of the last line?
    [/quote]

    line up, ie $55f2 ...
    Alcoholics Anonymous Alcoholics Anonymous February 2008 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 …

    ... colour will change on whatever line the TV got to drawing.
    All the recent emulators simulate TV-raster drawing, so you can do ... only copy data above the line the TV is currently drawing, you ... each row of the screen and the screen is drawn from pre ...
    joefish joefish January 2012 Development
  • Incorrect Spectrum +3 emulation: different results on Fuse and SpecEmuWhen developing and testing [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027591"]Rotatrix[/URL], I noticed different results on Fuse and S…

    ... the screen so it's already in contention. Successive lines line ... sits comfortably with the line-by line memory contention. The problem ... to write the first line twice using exactly the ... by the time the TV raster displays the first line, the colours are ...
    joefish joefish May 2012 Emulators
  • Games with good scrollingI know the Speccy's forte was not scrolling games but their must have been some that not flick screen and maybe even smooth! I remember playing a few…

    ... couldn't redraw the entire screen at 50fps, so they'd ... TV's line-by-line (raster) refresh, trying to get everything done as the TV raster ... The precise synchronisation with the TV is why some of these ... the brief period that the TV raster sweeps over them, then ...
    joefish joefish October 2012 Games
  • New bicolour game: El Stompo.Phew! Finally finished my first game using Einar's fantastic Nirvana engine. [B]El Stompo.[/B] [IMG]http://i1142.photobucket.com/albums/n608/davey…

    ... just the equivalent of the raster-sky effects, which are achieved ... the ST using a per-screen-line interrupt to modify the palette ... -attribute (rather than palettised) screen, you're changing the colour ... time actually refreshing the screen on the TV. So if you ...
    joefish joefish April 2014 Brand new software
  • draw single pixel in the borderI have problems with drawing in the border. I can get it to draw a line ,but it always becomes a line and not a single pixel. <br><br>rept 3580 <br…

    ... TV raster scan is jumping back to the start of the next line ... of the screen, so the whole pixel line of the ... could hope for alongside the screen area is one colour at ... to the edge of the screen, and the same again on ...
    joefish joefish May 2015 Development
  • Does ScanLine[0] have a left border?My emulator couldn't handle Cobra or ShortCircuit so I added some rough port FF values. I now want to make it a bit more accurate. The FAQ gives me a…

    ... />
    "define a screen line to start with 256 screen pixels, then border ... is at Screen[48,64] (48 pixels of border, 64th line down ... ,0]! If a TV could display every line would the left border ... ? Is it synching with the TV? Or are the 24 tstates ...
    Unique Unique February 2005 Development
  • Please, convert your game to EP128The Enterprise is a Zilog Z80-based home computer first produced in 1985. It can simulate the specy screen, so most of the EP128 game is specy conver…

    ... . It can simulate the specy screen, so most of the EP128 ... change 8 colours[b] per raster[/b] line! So you can make ... .htm

    A test screen of Wizards Lair:
    https ... =20101;image

    Test screen of Popeye (right):
    https ...
    endi endi January 2018 Brand new software
  • Fastest emulator screen renderingHi, I'm developing an algorithm for fast emulator screen rendering and here is what I came up with. 1) Use 4bpp indexed image format as target …

    ... algorithm for fast emulator screen rendering and here is ... .[code]byte=next screen byte // get next screen byte
    ... offsets from 16384 for each screen line as[code]uint16_t offsets[ ... 32 bytes from speccy screen for every line directly into bitmap) ...
    tstih tstih November 2019 Development
  • Quick bioOMG! - so this is what the internet was created for! and all that time i thought it was all about porn! ;) i've finally found somewhere to share my…

    ... at a time when the TV raster is known to be at ... then copying, whilst also preventing screen tearing, which was a clever ...
    Woody Woody February 2004 Games
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... to line 8, then line 16, then back to line 9, then line 17 ... line order: line 0, then line 1, then line 2, etc. so that the raster ... will only cross the copy once and only one line ... the interrupt so that the TV raster is always ahead of your ...
    Alcoholics Anonymous Alcoholics Anonymous September 2004 Development
  • Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…

    ... your sprite to the screen before the raster has reached the point ... on the screen that you are ... before the raster gets back to the top of the screen (display ... etc. take 228 tstates per screen line. Hope this is of help ...
    dmsmith dmsmith October 2004 Development
  • Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…

    ... ; 1 frame so the TV's raster will draw these partially erased ... that it occurs when the TV raster will not cross any sprite ... the TV raster crosses a minimum number of half-drawn areas on screen ...
    Alcoholics Anonymous Alcoholics Anonymous October 2004 Development
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... /> So it converts the "real" TV screen position to the correct place ... , does the size of the TV raster "plot" equals to a Spectrum ...
    Rickard Rickard May 2007 Development
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... ]So it converts the "real" TV screen position to the correct place ... , does the size of the TV raster "plot" equals to a Spectrum ... -- in even screen refreshes it draws on even TV lines and on ... odd screen refreshes it drawn ...
    Alcoholics Anonymous Alcoholics Anonymous May 2007 Development
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... TV raster.

    SP1's display model has the screen ... actually draw this stuff to screen. The [b]d_DrawPlotIntoBuff()[/b ... of character cells on screen (described by a " ... 0 if none)
    uchar *screen; // +8 address in display ...
    Alcoholics Anonymous Alcoholics Anonymous September 2007 Development
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... TV raster begins drawing the top pixel row of the screen ... 0); // move sprite off screen
    sp1_DeleteSpr(p->sprite ... the TV raster is so that all drawing to screen can ... times it is completely on screen
    {
    g_scrollShift = 15; ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • The 8-Bit Book...Tentative cover design to replace the Elite-based one... It's been made to look as close to the old Electro-Fluorescent display as possible... Some …

    ... has an array of 4x40 line alphanumeric VFDs, although they are ... 'd go for a mock TV style screen with an 8x8 font ...
    Winston Winston October 2008 Chit chat
  • Sinclair Light Gun and modern tellies/monitorsDoes the Sinclair Light Gun work with modern LCD/TFT/plasma screens? I have my Speccy linked up by TV card to a PC outputting to a LCD monitor, and …

    ... TV raster scan. It would have to read what is on the screen ...
    joefish joefish June 2009 Sinclair Miscellaneous
  • Sinclair Light Gun and modern tellies/monitorsDoes the Sinclair Light Gun work with modern LCD/TFT/plasma screens? I have my Speccy linked up by TV card to a PC outputting to a LCD monitor, and …

    ... TV raster scan. It would have to read what is on the screen ...
    Dunny Dunny June 2009 Sinclair Miscellaneous
  • Framerate of Spectrum gamesI was reading a bit about framerates in modern games and it got me wondering about the Speccy. First off I'd hoped to find what framerate my old gam…

    ... is necessarily tied to the TV framerate. On the spectrum this ... effects connected to where the TV raster was at any moment -- things ... rainbow effect in the title screen of Uridium. I did notice ... the top third of the screen of Green Beret when a ...
    Alcoholics Anonymous Alcoholics Anonymous November 2009 Games
  • DivIDEo - streaming video on the DivIDEThis has been a bit of a personal holy grail for years and years, so I'm very pleased to announce the release of DivIDEo, my streaming video system f…

    ... machines:
    - length of each TV line is 224 tacts in 3 ... )
    - each frame contain 320 TV lines (ZX128 only 311 lines ... end of last ZX screen line (end of line 192)
    - adressation of ...
    velesoft velesoft May 2010 Announcements
  • Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …

    ... one raster (the 256 pixels of one screen line), then PUSH to screen memory ... during the uncontended part (the border and line return ...
    joefish joefish August 2010 Development
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