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  • shamazx dma 15x anyone intereted? was hoping to get ula+ full screen animations working any programmers think they could disect rtype replace screen scrolling…

    ... intereted? was hoping to get ula+ full screen animations working
    scrolling with dma code?

    rogerjowett1 rogerjowett1 April 2022 Hardware
  • shamazx dma15x anyone intereted? was hoping to get ula+ full screen animations working any programmers think they could disect rtype replace screen scrolling w…

    ... intereted? was hoping to get ula+ full screen animations working
    scrolling with dma code?

    rogerjowett1 rogerjowett1 April 2022 Hardware Preservation
  • shamazx dma 15x anyone intereted? was hoping to get ula+ full screen animations working any programmers think they could disect rtype replace screen scrolling…

    ... intereted? was hoping to get ula+ full screen animations working
    scrolling with dma code?

    rogerjowett1 rogerjowett1 April 2022 Hardware
  • Build your own spectrum ?OK this must be a daft question but I got hold of a Spectrum circuit layout a while ago and [for a laugh - it's been a quiet week at work [img]/__for…

    I have seen a Spectrum-clone from the USSR or was it Rumania??? Whatever...
    It had the entire memory and ULA-handling in only one chip. So there are
    alternatives for the ULA. ALthough the snow-effect with the I-reg was no longer....
    Anonymous Anonymous July 2001 Sinclair Miscellaneous
  • ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…

    ... should be for the bit scrolling in. Then you need to ... hand - suffice to say the horizontal one is visibly slower than ...
    Anonymous Anonymous June 2002 Games
  • Graphics in bordersI am 50% certain that I remember a game that had graphics in the borders. This always made we wonder why none of the other games did. Am I right or h…

    Well, you could have colored horizontal bars, or even some more ... pattern, by tampering with the ULA at raster scan speed.
    Alessandro Tommasi Alessandro Tommasi May 2003 Games
  • Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…

    ... . You can spot this as horizontal "tears" in the sprites, especially ... a masterpiece. The speed, smooth scrolling and parallax really showed off ...
    Alcoholics Anonymous Alcoholics Anonymous July 2003 Games
  • Is spectaculator emulating the +2 correctly?i remembera few games that would crash when running in 128K mode, due to a bug in the hardware of the grey +2, hence it being replaced with the +2a. …

    The 'snow bug' in the ULA is present in all models ...
    Jon Needle Jon Needle August 2003 Emulators
  • Head Over Heels remake RELEASED !Hey all ! The Retrospec remake of Head Over Heels has JUST been released. The URL with everything important, including a 15Mb download is : [url="h…

    ... the surprisingly effective use of scrolling in multi-screen rooms.
    snow, which is an effect I ...
    NickH NickH September 2003 Games
  • [NEW]: Spectaculator 6.0Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emulates the 16K/48K/128K/+2/+…

    ... drivers for Windows ?
    Snow effect emulation in ULA


    Andrew Barker Andrew Barker December 2003 Emulators
  • C64 & Spectrum loadingscreens!I was bored today, so I decided to compare some stuff. :) [url="http://www.lemon64.com/loadingscreens/"]http://www.lemon64.com/loadingscreens/[/ur…

    ... />
    Not true: the ULA grabs entire bytes (it does ... I would guess that the ULA accesses the video memory in ... I would bet that the ULA does this, quickly reading ... NTSC uses a 15.75kHz horizontal scan, so this means ... is that once the ULA decides to draw a ...
    Alcoholics Anonymous Alcoholics Anonymous February 2004 Games
  • EmuZWin supports 256 color gamesI am sorry starting new topic, but you see this info is important a bit: new version 2.4 of the EmuZWin is available to download, and it supports 25…

    ... grid (e.g. scrolling to the nearest horizontal edge) it is better ...
    Vladimir Kladov Vladimir Kladov April 2004 Emulators
  • Strange layout of Spectrum video memoryHello, does anyone have an idea why the Spectrum's video memory has such a strange layout? I understand that a resolution of 256x192 is an easy mean…

    ... these lines should allow the ULA to walk through the video ... software-controlled switch in the ULA might be a nice thing ... could have designed a real scrolling editor using the normal memory ...
    J?rg Pleumann J?rg Pleumann August 2004 Sinclair Miscellaneous
  • Any programmers interested in writing for a more powerful machine?Apparently not.

    ... : 272K
    ROM: 32K
    ULA: 27K 4x 256x192 (8x8 attributes ... -8912 / Beeper

    has ULA any features like sprites, fast ... i can not imagine software scrolling on advanced gfx modes for ...
    Fikee Fikee June 2005 Development
  • Is Zynaps the best side scrolling SEU ever released for the Spectrum?In my opinion it is. What do others think? Was there anything that was better? Derek

    ... is a vertical scrolling shooter, not a side scrolling shooter. It is ... ]

    it could be horizontal if you put your tv ...
    chop983 chop983 August 2005 Games
  • Is Zynaps the best side scrolling SEU ever released for the Spectrum?In my opinion it is. What do others think? Was there anything that was better? Derek

    ... is a vertical scrolling shooter, not a side scrolling shooter. It is ... ]

    it could be horizontal if you put your tv ...
    thx1138 thx1138 August 2005 Games
  • The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …

    ... at a time. The ULA obviously takes priority, so ... control over the ULA. As the ULA runs through its ... change the attributes as the ULA passes over them, and ... the same location - the ULA will pick up the ... unit of change is 4 horizontal pixels. Many demos make ...
    Dunny Dunny November 2005 Hardware
  • The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …

    ... 4 horizontal pixels.
    [/quote]

    Four pixels? The ULA grabs ... make visibile changes in 8 horizontal pixel units. If you could ... in 4-pixel units, the ULA would have to fetch each ...
    Alcoholics Anonymous Alcoholics Anonymous November 2005 Hardware
  • The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …

    ... 4 horizontal pixels.
    [/quote]

    Four pixels? The ULA grabs ... make visibile changes in 8 horizontal pixel units. If you could ... in 4-pixel units, the ULA would have to fetch each ...
    Dunny Dunny November 2005 Hardware
  • Remastering Speccy GamesHas anyone ever thought about designing remastered versions of Spectrum games for consoles like the Master System / Mega Drive? I can not code very …

    ... 64
    o Horizontal, diagonal, vertical, and partial screen scrolling
    * Sound ...
    na_th_an na_th_an November 2005 Games
  • The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…

    ... scroll still isnt smooth, especcialy horizontal text scroll in several games ... /> Which games? I get smooth scrolling in everything I've tried ...
    Dunny Dunny February 2006 Emulators
  • FuseX on the Xbox :releases, testing and feedbackI'm creating a new thread here to continue on from the thread about emulators on the Xbox ([url="http://www.worldofspectrum.org/forums/viewtopic.php…

    ... "Ant attack" straight vertical and horizontal lines can be seen going ... so slightly less smooth on scrolling.
    is this like this ...
    loony_jetman loony_jetman March 2006 Emulators
  • z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…

    ... ).

    For horizontal pixel rotation, each "struct sp1_cs ... directly to its left. Horizontal rotation is done by table ... each frame."
    - Scrolling by pixel increments is out ... civilization / board game types of scrolling).
    - The engine 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…

    ... sp1_CreateSpr()
    char dx; // signed horizontal speed in pixels
    char ... be making will have unique horizontal and vertical speeds measured ... ? Nothing usually, but the ULA is generating an interrupt each ...
    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…

    ... br /> On the Spectrum, the ULA generates a maskable interrupt at ... not straightforward however. The ULA was not designed to ... (I*256+256) the ULA interrupt will cause our subroutine ... br /> ; f200 - ffff SP1.LIB horizontal rotation tables
    ; f000 - f1ff ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • Missing NemesisI was reading one of the threads the other day about over rated spectrum games and came across the suggestion that Nemesis (the space shooter known a…

    ... than any other horizontal shooter to program... The scrolling isn't fast ...
    chaosmongers chaosmongers June 2006 Games
  • Missing NemesisI was reading one of the threads the other day about over rated spectrum games and came across the suggestion that Nemesis (the space shooter known a…

    ... than any other horizontal shooter to program... The scrolling isn't fast ... makes them superb machines for scrolling shoot-em-ups. The MSX ... bit harder to get the scrolling.

    Given that the ... to come up with a scrolling shooter that wasn't utterly ...
    Matt_B Matt_B June 2006 Games
  • The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…

    ... /> But yes, it's hardware scrolling. No writing to the screen ... found a way to stall ULA access to the display RAM ...
    Alcoholics Anonymous Alcoholics Anonymous July 2006 Emulators
  • The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…

    ... /> Basically you're using the "snow" effect, knowing how it works ... expect, anyhoo. Not exactly "hardware scrolling", but more "image displacement"?
    icabod icabod July 2006 Emulators
  • RealXThis may be a dumb question but will RealX ever get released?

    ... /> Your Snow documentation also states incorrectly that the address the ULA uses ... to build up the "snow" is formed ... cannot obviously test RealSpec's snow effect as there is none ... but we did test the "snow contention", and you do emulate ...
    piters piters July 2006 Emulators
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