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<1234567…34>
  • MakeTZX DMA Buffer Overrun ?Okay folks, Does anyone know why I get DMA Buffer Overruns when using MakeTZX. Could it be anything to do with my SB Enironment string or anything …

    ... know why I get DMA Buffer Overruns when using MakeTZX. Could ... it possible to change the buffer at all ?

    Just ...
    Andrew Barker Andrew Barker January 2003 Sinclair Miscellaneous
  • Buffer AdventureQuite a few months ago, probably this year but well before the 60-day history kept on eBay, I was outbid on a copy of Buffer Adventure by someone who…

    ... outbid on a copy of Buffer Adventure by someone whose user ...
    Battle Bunny Battle Bunny September 2005 MIA/STP/SDP
  • Return of Speccy screen buffer formatI recently discovered that the Spectrum screen buffer format that allows only two colours in an 8x8 pixel block has made its return in a slightly dif…

    ... discovered that the Spectrum screen buffer format that allows only two ...
    vilcans vilcans November 2005 Sinclair Miscellaneous
  • 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…

    ... must be drawn in a buffer (72 bytes for 9 UDGs ... the screen or to a buffer in memory. The scroller reads ... -width text bitmap from the buffer and scrolls that on the ... -- it will once it's explained, even for the basic people ...
    Alcoholics Anonymous Alcoholics Anonymous June 2007 Development
  • Science Explained (Finally)!We believe that all the main physics principles can be explained away by the existence of tiny gnomes. Electricity: Inside cables there are hundreds…

    ... main physics principles can be explained away by the existence of ... northern spectacle can now be explained. Gnomes become blind when they ...
    Ian Hamilton Ian Hamilton July 2008 Chit chat
  • The ZX printer buffer in +3 modeI have a few programs on .DSK images that were transferred from Timex disks, but some of them have code starting at 23296. Most of the time the code …

    ... crash and use the printer buffer area while in +3DOS? I ...
    zxbruno zxbruno December 2008 Sinclair Miscellaneous
  • Writing to the screen from a bufferI?m designing a game and am spending a bit of time trying different ideas before I commit my self. I?m currently thinking of writing data to a buffer…

    ... of writing data to a buffer and then writing this ?back ... buffer? to the screen. Can the ... screen be drawn from the buffer without flicker ? If not, what ...
    Mr Millside Mr Millside June 2009 Development
  • Question on copying screen bufferHi, Al my prevoius games were copying graphics directly to screen memory starting at 16384. Now I'm experimenting with screen buffer where I could d…

    ... I'm experimenting with screen buffer where I could draw my ... just copying static image from buffer to screen after HALT.
    Ralf Ralf December 2009 Development
  • Disabling the +3 disk buffer; yes, but how?I would like to disable the +3 disk buffer in order to retrieve those 4K from the machine's RAMdisk. By reading the computer manual and some posts on…

    ... to disable the +3 disk buffer in order to retrieve those ...
    Alessandro Grussu Alessandro Grussu February 2013 Sinclair Basic
  • Using the stack to blit bufferI was using a ldir to blit my back buffer to the screen RAM, and it was working pretty well if not rather slow. After reading about using the stack …

    ... ldir to blit my back buffer to the screen RAM, and ... like:

    ld sp, buffer
    pop af
    pop ...
    Atari_Jetman Atari_Jetman February 2014 Development
  • From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…

    ... *20) DIM variable for "video buffer".
    - A zone of RAM ... /make my v$ string "video buffer" for paint whole level screen ...
    Hark0 Hark0 March 2014 Sinclair Basic
  • Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…

    ... decided to use a Double Buffer (DB) or 'Back Screen' to ...
    LuMan LuMan April 2014 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…

    ... self.createBuffer() #1 - Create the buffer
    self.specifyCodeAddress() #2 - Specify ...

    #1 - Create the buffer
    def createBuffer(self):
    KrazyKattapilla KrazyKattapilla August 2014 Development
  • Jetset Willy ATTR Buffer 2Does anyone understand how Jetset Willy uses the system vars area as screen ATTR buffer 2? H5C00 D23552. Thanks

    Does anyone understand how Jetset Willy uses the system vars area as screen ATTR buffer 2?

    H5C00 D23552.

    Thanks
    stevebroad stevebroad September 2014 Sinclair Miscellaneous
  • Buffer to screen - how much?[FONT=Calibri][SIZE=3]I am starting to build a new game and am researching different ways to accomplish what I need to do. My question is, is it poss…

    ... possible to copy a back buffer of size 4096 bytes to ...
    Mr Millside Mr Millside September 2014 Development
  • Screen buffer Tip from Raff CeccoRaff very kindly gave me this tip: "Incidentally, I remembered a trick I used on the Z80 for extra speed: When clearing the screen buffer, it was a…

    ... />
    When clearing the screen buffer, it was actually much quicker ...
    alienbanana alienbanana October 2014 Development
  • 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…

    ... to vertical scroll my back buffer, but I'm not sure ... a line as explained here:

    My buffer is 22x26 chars ... therefore 18 chars wide. My buffer is arranged in a linear ...
    Atari_Jetman Atari_Jetman September 2015 Development
  • Cool program - buffer delayHere's something fun I wrote tonight thought I'd share. It's essentially a simple buffer delay. A building block for many things. https://www.drop…

    Here's something fun I wrote tonight thought I'd share. It's essentially a simple buffer delay. A building block for many things.

    https://www.dropbox.com/s/rk4q1xu2k2mkk62/BufferTest.z80
    ivanb303 ivanb303 November 2016 Sinclair Basic
  • off screen bufferwhen using an offscreen buffer is the memory copied to the screen in a way that makes it easier to draw sprites to the buffer? E.g. Lets say you…

    ... to draw sprites to the buffer?

    E. ... screen where you copy your buffer to,
    it is ...

    if the buffer was copied to the screen ... to draw sprites to the buffer, and then have them ... br /> draw background on buffer (or just clear it)
    slenkar slenkar June 2017 Development
  • z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…

    I explained that very badly... here's ... square into an 8-byte buffer before copying the final result ...
    Alcoholics Anonymous Alcoholics Anonymous September 2005 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... as the test programs are explained you will be able to ... buffers, and finally the finished buffer is copied to the screen ... into the pixel and attribute buffer and any sprites following it ... , the finished pixel and attribute buffer are copied to the screen ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... flag byte that will be explained shortly, the next two are ... // for occluding sprites, clear pixel buffer before draw
    #define SP1_TYPE_2BYTE ... , sp1_UpdateNow() will clear the pixel buffer before the sprite character is ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... going to have to be explained. If you already know about ... /> ; d4ff - d4ff SP1.LIB attribute buffer
    ; d4f7 - d4fe SP1.LIB ... pixel buffer
    ; d4ee - d4f6 SP1.LIB ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • CLEAR does not RESTORE the DATA pointer??According to the Spectrum manual, one of the things that a CLEAR command does RESTORE the DATA pointer. Either it doesn't actually do this, or some…

    ... as AASVOGEL and AARDVARK is explained. The translator has simply translated ...
    Geoff Geoff September 2006 Sinclair Basic
  • Possible great ideaHello there everybody, I have been toying with the idea of doing a project here with the help of the gurus on the forum. The idea is to start the de…

    ... with this better described and explained in plain English as the ... screen or into a memory buffer (for scrolling).

    [quote ...
    Alcoholics Anonymous Alcoholics Anonymous June 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…

    ... pointer to start of text buffer
    }
    [/code]

    explained under "interrupt.c" above.
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • HELP: Installing FUSE on OpenSolarisDigital Prawn has made packages of Fuse 0.9.0 for OpenSolaris. I am still trying to get Fuse 0.10.x to compile under Solaris 10 U6.

    ... the latest release for reasons explained later.

    6) Download ...
    Digital Prawn Digital Prawn May 2008 Emulators
  • Some ever noticed that +2A/+3 halts Z80 using WAIT?I mean: Anyone ever noticed that the +2A/+3 halts the Z80 using WAIT? All documentation I've read about contention state that the ULA halts the Z80 …

    ... it has a small internal buffer such that the CPU can ... and later the ARM CPU, explained that many of the components ...
    Winston Winston October 2009 Hardware
  • An idea for a possible(?) new interfaceDue to the Spectrum's processor speed and the way the ULA works, there are a couple things (among others) that are difficult to do: -Gigascreen or a…

    ... write your waveform to a buffer instead, then get on with ... the sound hardware empties the buffer. [/QUOTE] Nice brainwave, would be ... the sign on the exhibition explained. But all I noticed was ...
    roko roko October 2009 Hardware
  • An idea for a possible(?) new interfaceDue to the Spectrum's processor speed and the way the ULA works, there are a couple things (among others) that are difficult to do: -Gigascreen or a…

    ... the sign on the exhibition explained. But all I noticed was ... DAC with a small RAM buffer would of course be better ...
    Winston Winston October 2009 Hardware
<1234567…34>

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