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Search Again :: Adv Search 1000 results in 0.168s
<1234567…34>
  • Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…

    ... way to redraw the screen from UDGs? The aim is to model ... be wise to copy the attributes to the main screen at least ... the UDGs are drawn, to try to minimise screen tearing.

    to enable scrolling in the translation from map to screen.
    ...
    joefish joefish March 2013 Development
  • Double Buffer UtilityHi Folks, I've been experimenting with double buffering on a 48k Speccy for a small project I'm working on. After reading lots of good advice here…

    ... 14 characters high
    # from the buffer to the screen
    # NOTE - See ... rectangle from row 1 in the buffer
    #
    #Copy to screen x- ... Row width to copy

    self.sourceXPos = self.inputValue('Copy from buffer x-position ...
    KrazyKattapilla KrazyKattapilla August 2014 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 …

    ... is done does it copy this to screen. All sprite and ... is copied to screen, the destination screen address is retrieved from the ... copying the 8-byte buffer to screen is small, tearing is ... horizontal shift causes a much faster blit to screen to be used.
    ...
    Alcoholics Anonymous Alcoholics Anonymous January 2012 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 …

    ... is done does it copy this to screen. All sprite and ... is copied to screen, the destination screen address is retrieved from the ... copying the 8-byte buffer to screen is small, tearing is ... horizontal shift causes a much faster blit to screen to be used.
    ...
    climacus climacus January 2012 Development
  • 64x48 monochrome big pixels display ideaHi. I was playing with this idea of having a simple 64x48 bytes buffer, 1 byte per pixel, then a renderer which would take that buffer and render it…

    ... from buffer to screen will be much easier and faster. You will just need to copy 32 ... bytes from buffer to screen, without "combining ... screen up/down will be 2x times faster since you will need to ...
    Einar Saukas Einar Saukas December 2014 Development
  • 64x48 monochrome big pixels display ideaHi. I was playing with this idea of having a simple 64x48 bytes buffer, 1 byte per pixel, then a renderer which would take that buffer and render it…

    ... from buffer to screen will be much easier and faster. You will just need to copy 32 ... bytes from buffer to screen, without "combining ... screen up/down will be 2x times faster since you will need to ...
    introspec introspec December 2014 Development
  • 64x48 monochrome big pixels display ideaHi. I was playing with this idea of having a simple 64x48 bytes buffer, 1 byte per pixel, then a renderer which would take that buffer and render it…

    ... lines from buffer to screen
    REPT 2 ; copy 2 "half-lines" (16 bytes each) from buffer to screen ... T-states to copy the entire attribute buffer to screen every frame (thus faster than any ...
    Einar Saukas Einar Saukas December 2014 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…

    ... the copy-to-screen.[/quote]
    With a single 4k buffer you ... slower on average. Buffer transfer code is similar ... it going to copy 2/3 of the screen ahead of ... The full time from "ld ix,copy_addr_table" to the next ... could be probably done faster, but in any ...
    Lethargeek Lethargeek March 2019 Development
  • Conversion tool - bmp/gif to screen$Hihi Not sure if this is exactly the right place to ask, I don't see a software forum Is there a tool to convert a bmp or gif file to a screen$ sui…

    ... exactly the right place to ask, I don't ... bmp or gif file to a screen$ suitable for spectrum ... use? I know there are tools to go from ... .scr to gif etc. but ... I want to be able to ...
    Hideki Hideki June 2008 Development
  • 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 …

    ... [b]pop[/b], but have to give much of it back ... uses a loop. How much faster can it be?[/QUOTE]
    copy used for multicolor or my description of push/pop copier from ... 't forgot contetion (and you copy to screen memory very often). having contetion ...
    Fikee Fikee August 2010 Development
  • Contention: LDI vs LD (ss), rAccording c.s.s. FAQ: instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b] and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b] can anyone explain why …

    ... how many bytes it can copy to screen between T=14336 (end of ... bottom border). basically, it simulates copy from back buffer to screen.


    LDI ...
    Fikee Fikee February 2011 Development
  • Your Spectrum RegretsSpeccy things that you have done (or haven't done) and have regretted them since. Here's mine... (in no particular order). 1) Sold my Spectrum 128K…

    ... in headerless code and copy a screen from a buffer.... Made up for ... /card/sticker/badges collectables from Microfairs and PCW shows ... Selling my pristine boxed 48k to an idiot mate that ... br /> Wiping the tapes containing screen$ artwork and graphics I created ...
    MatGubbins MatGubbins August 2014 Sinclair Miscellaneous
  • A vehicle for wireframe engineHi, I'm playing with wireframe graphics right now. I'm open for ideas for (simple) game that would use wireframe engine. So if you have an idea, plea…

    ... and COPY2SCR along with 4KB buffer.

    Simple benchmark ... can clear buffer, draw roughly 70 lines and copy to screen in 9 ... you could have a faster routine to clear buffer. Instead of this:< ...
    or, if you want to support arbitrary values in A ...
    Einar Saukas Einar Saukas February 2015 New game ideas
  • 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 …

    ... The idea is to:
    1) detect screen writes, and border ... finished writing to screen.
    Then on the 69888 tick, copy to screen, and ... the size of the buffer to reduce the lag but ... ULA read from for unsupported ports. So while screen generation is ...
    Dunny Dunny November 2019 Development
  • Route finder, how to get from A to B?My brother wants to know how to get from Manchester (England) to Lanzarote, and also how to get from Manchester to Britany (France), both by motorbik…

    ... to know how to get from Manchester (England) to Lanzarote, and also how to get from ... Manchester to ...
    ewgf ewgf January 2009 Chit chat
  • Best demos/games to download from XBox Live - any suggestions?Anybody got any recommendations for the best games/demos to download from XBox Live? Just looking from something else to play when I'm not roaming t…

    Anybody got any recommendations for the best games/demos to download from XBox Live?

    Just looking from something else to play when I'm not roaming the land of Cyrodill, murdering people in their beds at night for the Dark Mother. :D
    BigBadMick BigBadMick November 2009 Chit chat
  • Converting jpeg/bmp/gif to SCREEN$ fileMight be a bit of a long shot, but is there any way of converting an image file with the correct dimensions/colours to SCREEN$ file that can be loade…

    ... with the correct dimensions/colours to SCREEN$ file that can be loaded ... up with a converter program to do this.

    Failing ...
    daveysludge daveysludge January 2012 Development
  • Best Way to Learn From Input Magazines?Hey all. I'm the lucky recipient of all the Input magazines that were published by Marshall Cavendish back in the day. I've decided to start prog…

    ... .

    I've decided to start programming again for fun ... was wondering the best way to learn from Input.

    Should ...
    dmspar dmspar February 2013 Sinclair Miscellaneous
  • BBC to screen live game tournamenthttp://www.bbc.co.uk/news/technology-34475037 interesting, could be the start of something? [quote]The BBC is to stream live coverage of a majo…

    ... />
    [quote]The BBC is to stream live coverage of a ... /> maybe we can get them to screen a knockout manic miner tourny ...
    mel the bell mel the bell October 2015 Chit chat
  • Some more games to sell from JapanHi again folks, I have a few more games to sell from here in Japan. I've tested them all and they all work ok. Some are weird, they'll only load o…

    ... have a few more games to sell from here in Japan. I ... on either my +2 or from my external tape recorder, but ... EPROM programmer you can use to write ROMs for the ... , it's fairly reasonable to send them that way.
    to swap.
    I have ...
    MagicKnight MagicKnight January 2017 Sales
  • Fake screenshots? No - now it's REAL screenshotsOk then. A few weeks ago I said I will show You the new gfx-mode of Speccy and - here it is: [url="http://republika.pl/hooy_prg/hprg.zip"]http://rep…

    ... to use 128 for this technique. ive almost got there, one screen ... will be fast enough, screen compilers sure as hell arent ... around 100000 T-States to copy a screen from a screen location and you ... only get around 69888 to ...
    cyborg cyborg March 2003 Sinclair Miscellaneous
  • Fake screenshots? No - now it's REAL screenshotsOk then. A few weeks ago I said I will show You the new gfx-mode of Speccy and - here it is: [url="http://republika.pl/hooy_prg/hprg.zip"]http://rep…

    ... 100000 T-States to copy a screen from a screen location and you ... only get around 69888 to ... any idea how to start from a fresh screen and how i ... LDIR copy-routine which will copy the second screen from 49152 to the ...
    Amigo Amigo March 2003 Sinclair Miscellaneous
  • Coder`s with time....How many coders are there who can program anything? i.e. Commercial quality games, full blown applications, utilities etc.... who can do the lot? I…

    ... />
    Windows XP can Print Screen just fine. Actually id recommend ... do ALT+Print Screen, that will take a screen only of the ... not the whole screen. then there's no need to open some ... border around it select from [B]Copy To[/B] ... from the [B]EDIT[/B ...
    Sadako Sadako June 2004 Development
  • Coder`s with time....How many coders are there who can program anything? i.e. Commercial quality games, full blown applications, utilities etc.... who can do the lot? I…

    ... />
    Windows XP can Print Screen just fine. Actually id recommend ... do ALT+Print Screen, that will take a screen only of the ... not the whole screen. then there's no need to open some ... border around it select from [B]Copy To[/B] ... from the [B]EDIT[/B ...
    CKay CKay June 2004 Development
  • Fastest Block Drawing Code?Following on from my scrolling thread [URL="http://www.worldofspectrum.org/forums/showthread.php?p=351304#post351304"](http://www.worldofspectrum.org…

    ... to draw the blocks to the backbuffer, add the sprites, copy to screen ... de,04000h ; de points to screen (top left)
    call ... /> ; Get 4 bytes from GFX
    pop de ... br /> ; Work out next screen line
    NextPixelLine:
    ...
    robpearmain robpearmain May 2009 Development
  • A vehicle for wireframe engineHi, I'm playing with wireframe graphics right now. I'm open for ideas for (simple) game that would use wireframe engine. So if you have an idea, plea…

    ... quiet but I wanted to have something to show before going further ... and COPY2SCR along with 4KB buffer.

    Simple benchmark (line ... library can clear buffer, draw roughly 70 lines and copy to screen in 9 ... .5 fps).

    Going to sleep now :)
    catmeows catmeows February 2015 New game ideas
  • 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…

    ... start drawing to screen from the top line of the buffer but from the 2nd ... at beginning of the buffer. While drawing to screen from top to down you start ... drawing in the middle of buffer, go to ...
    Ralf Ralf September 2015 Development
  • 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 …

    ... "]Then on the 69888 tick, copy to screen, and sync with the real ... to emulate 48K only?

    128K/+2 machine runs slightly faster ...
    Bedazzle Bedazzle November 2019 Development
  • Help, my Sprite Code wont workI have zipped it all up here: [url="http://www.peargames.co.uk/downloads/galagorf.zip"]http://www.peargames.co.uk/downloads/galagorf.zip[/url] If y…

    ... I have tried to implement Derek Smiths code to preshift all bytes ... /> Use Q,A,O,P to move the ball

    to a backbuffer then copy to screen

    cheers ...
    robpearmain robpearmain December 2005 Development
  • Whats the name of this game? Drawing includedHello. There was this game that was one of the first ones I have played on Spectrum. I never got into it, but I remember it as a decent game. In the …

    ... in a helmet who runs screen to screen from left to right. His legs move ... />
    The graphics were similar to Blind Panic or Dynastar I ... />
    I drew a sketch from my memory in paint and ... uploaded it to flickr. Check it out [url ...
    Vortexrider Vortexrider July 2008 Games
<1234567…34>

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