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  • 4116 DRAM for 48KSomeone told me I got faulty RAM in my broken 48K. They should be 150ns, right? What would be a good place to buy them from?

    ... , and a particular version ULA. Other than that, it ... boards, or other version ULA's. For myself, I ... Spectrums available, most with same ULA inside.

    [ ... it!

    The snow is data "leaking" from the ... onto the data the ULA is reading for the ...
    RetroTechie RetroTechie February 2009 Hardware
  • Am I the only person who enjoyed Chuckie Egg 2...?...more than Chuckie Egg? Now before the cries of "heresy" and/or "arse" ring out, let me defend my possibly controversial stance. I enjoyed Chucki…

    ... but Mighty Bombjack was a horizontal/vertically scrolling affair but worked really ...
    psj3809 psj3809 March 2009 Games
  • Successor to the SpeccyBased on the rambling on the other thread it would be interesting to see what people felt was the 'spiritual' successor to the speccy. Amiga here....

    ... had faster and smoother parallax scrolling than ST SotB. My ... code routines did full 320x200 scrolling on two planes, with another ... address of the screen ('synch scrolling'). That's what [I]Enchanted ... stuck with the 16-pixel horizontal step because of the way ...
    joefish joefish May 2009 Chit chat
  • Nice Graphics seduce innocent reviewerWas downloading a few more games to have a whirl on today and came across LIGHTFORCE. Remember this getting smashed by Crash and getting pretty much …

    ... it has coloured yet pixel-scrolling backgrounds which the sprites actually ... reminds me of the vertical scrolling sections of [I]Salamander[/I ... a disappointment after the excellent horizontal sections.

    The other ...
    joefish joefish May 2009 Games
  • Successor to the SpeccyBased on the rambling on the other thread it would be interesting to see what people felt was the 'spiritual' successor to the speccy. Amiga here....

    ... /> Did you only ever play horizontal scrollers on the ST then ... machines handles the sprites and scrolling, whilst in the former it ... well; however, the dedicated sprite/scrolling hardware was very much of ...
    Matt_B Matt_B May 2009 Chit chat
  • Colour clash on the Commode64?Was there any? Every now and again, I see a screen shot like this... [img]http://www.lemon64.com/games/screenshots/full/j/jack_the_nipper_02.gif[/i…

    ... you switch to half the horizontal resolution, but one of those ... lot of fast-moving or scrolling games use the character-mapped ...
    joefish joefish September 2009 Chit chat
  • Colour clash on the Commode64?Was there any? Every now and again, I see a screen shot like this... [img]http://www.lemon64.com/games/screenshots/full/j/jack_the_nipper_02.gif[/i…

    [QUOTE=AndyC;385689]Still, scrolling was easily the weak point ... some basic scroll registers to ULA when 128k machines came out ...
    Tom-Cat Tom-Cat September 2009 Chit chat
  • Colour clash on the Commode64?Was there any? Every now and again, I see a screen shot like this... [img]http://www.lemon64.com/games/screenshots/full/j/jack_the_nipper_02.gif[/i…

    ... some basic scroll registers to ULA when 128k machines came out ... per machine to add hardware scrolling to the SAM Coupe was ... -bit machine desperate for hardware scrolling, that was certainly it.
    AndyC AndyC September 2009 Chit chat
  • Snow on screen of 48K Speccyok you wizards I fixed up my 4116 ram issue as Winston and McLeod advised me before by replacing with 4164's.... all I could find here in Singapore (…

    Does that snow appear from the first moment ... -prototype-or-the-importance-of-ula-cooling[/url]
    mcleod_ideafix mcleod_ideafix October 2009 Hardware
  • Snow on screen of 48K Speccyok you wizards I fixed up my 4116 ram issue as Winston and McLeod advised me before by replacing with 4164's.... all I could find here in Singapore (…

    ... is 100% solid, and the "snow" is white... I have only ... change) so ULA contention issue would surely make black snow...

    ula timing to mask out half ...
    nuggetreggae nuggetreggae October 2009 Hardware
  • Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…

    ... /o. In the spectruim the ULA's display file can be ... memory mapped display device. THe ULA actually owns the 16k RAM ... the MSX fairly crap at scrolling, an operation involving a full ...
    Alcoholics Anonymous Alcoholics Anonymous November 2009 Development
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... ]

    The ULA is timed to make two ... prior to drawing each horizontal 8 pixels. That's ... maintain the same horizontal resolution. Your ULA would have to ... called the column. The ULA gets its two display ... changes to how the ula did things although I ...
    Alcoholics Anonymous Alcoholics Anonymous November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    [QUOTE=Alcoholics Anonymous;398462]The ULA is timed to make two ... fetches prior to drawing each horizontal 8 pixels. That's one ... to maintain the same horizontal resolution. Your ULA would have to be ... is called the column. The ULA gets its two display file ...
    andrew_rollings andrew_rollings November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... (for example the full screen scrolling text messages in Prehistorik 2 ... to do it on the ULA+.

    I'm not ...
    AndyC AndyC November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... (for example the full screen scrolling text messages in Prehistorik 2 ... to do it on the ULA+.[/QUOTE]Thing is, a lot ...
    joefish joefish November 2009 Emulators
  • Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …

    ... refresh begins from top border horizontal line A (see my picture ... A ("vertical retrace") when the ULA doesn't output anything. This ...
    Philip Kendall Philip Kendall November 2009 Development
  • Shooter Racer TypeThingA bit like Spy Hunter flipped on it's side but actually plays a bit more like R-Type on wheels... A mock up screen: [IMG]http://img.photobucket.com…

    ... .

    are both vertical / horizontal speeds the same cpu taxing ... also have to use parallax scrolling for the road /pavement.
    fog fog December 2009 New game ideas
  • New BUZZSAW+ Demo, No.2OK everybody, here's the latest demo of [I]Buzzsaw[/I]. This includes the title screen I wrote in Corfu with control selection, some new sprites and…

    ... me, technically, is a vertically scrolling shooter. I'm developing an ... I have are a horizontally scrolling beat-em-up along the ... take full advantage of the ULA+ colours. Here I can use ...
    joefish joefish February 2010 Development
  • Moggy Adventure (Mojon Twins, 48K)After travelling across the world to become a gentleball and leave all his vices behind (mainly alcohol and the riverside weeds, but rumours suggest …

    ... /> Yeah sorry i didnt want scrolling (i know that would be ... tough) but a flick screen horizontal only 'old skool' game like ...
    psj3809 psj3809 February 2010 Games
  • Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…

    ... the precise timming the original ULA does (and this might be ... horizontal retrace, which is present in Y signal, from the 48K ULA ...
    mcleod_ideafix mcleod_ideafix March 2010 Hardware
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... showing it surrounded by either horizontal or vertical black strips.
    ULA generated pixels (using FULL mode ... 4:3 anymore (as the ULA seems to output wider vertical ... the far extremes, as the ULA is simply generating the next ...
    Madonna Mk 2 Madonna Mk 2 April 2010 Emulators
  • +2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…

    [QUOTE=ajmoss;448986]Will the ULA bug appear on the Spectrum + ... ]

    No. +2A/+3 ula don't snow.
    velesoft velesoft June 2010 Hardware
  • New game Sea Dragon (beta)Hi. Over at zx.pk.ru there is a lot of talk of a new game for spectrum called Sea Dragon. It is a VERY nice underwater side scroller... technically V…

    ... compare this game to a horizontal shooter, but thats really not ... a choice based on the scrolling engine, or some other technical ...
    kgmcneil kgmcneil December 2010 Games
  • Machine Code Sprites and Graphics for the ZX SpectrumHi Looking for this book, if anyone can help would be most grateful. [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=2000229"]http://www.wor…

    ... .

    One example of scrolling landscapes is Toni Baker's ... .zip]Moving Graphics of the Horizontal Kind[/url] in Your Spectrum ...
    Battle Bunny Battle Bunny January 2011 Wanted
  • Machine Code Sprites and Graphics for the ZX SpectrumHi Looking for this book, if anyone can help would be most grateful. [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=2000229"]http://www.wor…

    ... .

    One example of scrolling landscapes is Toni Baker's ... .zip]Moving Graphics of the Horizontal Kind[/url] in Your Spectrum ...
    Spiky16384 Spiky16384 January 2011 Wanted
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... chips was using the Ferranti ULA.[/QUOTE]
    C64 was more ... responsible for text modes, hardware scrolling and raster interrupts besides bitmaps ...
    TVzombie TVzombie January 2011 Hardware
  • RGB to VGA convertor for ZX128/+2/+2A/+3David Luftner release source code (VHDL) of SCANDOUBLER for ZX128/ZX128+2/+2A/+3: [url]http://velesoft.speccy.cz/other/scandoubler-for-zx128_fixed_by…

    ... effects in scrolling routines. For example doubling vertical AND horizontal should avoid ...
    ingo ingo January 2011 Hardware
  • Where's it all going?[Rerouted from 'Assembler Intricacies' in Development Forum] [QUOTE=Timmy;506104]I don't think we're in disagreement here. As I've said it's a niche…

    ... Spectrum has had since then, ULA breakdowns, Quad Core PCs with ... possible to extract a smooth scrolling engine out of that, joefish ...
    Alcoholics Anonymous Alcoholics Anonymous January 2011 Sinclair Miscellaneous
  • Where's it all going?[Rerouted from 'Assembler Intricacies' in Development Forum] [QUOTE=Timmy;506104]I don't think we're in disagreement here. As I've said it's a niche…

    ... specialized for different requirements (eg scrolling or not).

    The ... screen is drawn by the ula. Whether it ever gets done ...
    Alcoholics Anonymous Alcoholics Anonymous January 2011 Sinclair Miscellaneous
  • ZX Poly - wow!Hi Folks, Came across the following: [url]http://www.igormaznitsa.com/zxpoly/zxpoly.html[/url] Has anyone else seen this before? I am no hardware…

    Rather than all that, redesign the good old ULA... add new video mode, video ram, colors, sprites, scrolling... here we go
    maiki maiki February 2011 Hardware
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