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<1234567…34>
  • ULA snowHow is this feature implemented in emulators ? And how exact is the emulation ? I somehow supposed that ULA snow is something that is not very determ…

    How is this feature implemented in emulators ? And how exact is the emulation ?
    I somehow supposed that ULA snow is something that is not very deterministic in nature. But if one can emulate it (perfectly ?) then i was wrong.
    Fikee Fikee March 2012 Emulators
  • The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…

    ... no avail. I get the ULA snow, sure thing, but that’s ...
    Ast_A_Moore Ast_A_Moore February 2018 Development
  • ula bookula book is here: [url]http://www.zxdesign.info/book/[/url] can i post sam coupe stuff here - she kind of is a speccy if you stuff the speccy rom i…

    ula book is here:

    [ ... this is not described as ula snow - the description of that is ... which is what i thought ula snow was whereas that is described ...
    Roger Jowett Roger Jowett September 2010 Hardware
  • ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…

    ... 0x40-0x7F then the ULA gets confused by the ... memory address generated by the ULA (who wants to read ... two addresses. Therefore the ULA reads the data from an ... is actually read by the ULA is the following:
    ULA is busy drawing the border ...
    Hikaru Hikaru January 2014 Development
  • Interrupts, 16k Spectrums and snowI'm writing something for the 16k Spectrum and I want to use interrupts. The avilable documentation doesn't seem clear enough for me to figure out ho…

    ... .

    The problem is ULA snow. Snow appears if the I register ... I can use. But does snow happen on a 16k Speccy ... 48k machine.

    If snow _is_ a problem on 16k ...
    evilpaul evilpaul August 2017 Development
  • SPIN Public Beta 0.1b Available for downloadHi all, back again, and as just recently announced on CSS, SPIN has been updated. Here's the post to CSS (or the relevant parts): It's been a bu…

    ... and drop support.
    Added ULA Snow effect, and Floating bus based ...
    Dunny Dunny May 2002 Emulators
  • ZX Spin 0.4 available for Download.Standard Cut-n-Paste from the CSS post: If all goes well, I'll upload it to WOS on monday. ----------------------------------------- Okay, it's th…

    ... .
    Fixed a bug with ULA Snow and a reset - also demos ...
    Dunny Dunny November 2002 Emulators
  • ZXSpin 0.61 Available nowHi all! Well, after a lengthy few testing cycles, I'm taking the plunge and uploading the latest version of ZXSpin, to replace the rather aged old 0…

    ... />
    - Added much more accurate "ULA snow" and IR contention. Note that ... truly accurate snow is probably not an option ...
    Dunny Dunny December 2006 Emulators
  • list of ZX games with raining effect(ula snow)If you know any ZX games with raining effect in screen, then add game name to list. I know about this games only: (tested on real ZX128+2 - grey) 4x…

    If you know any ZX games with raining effect in screen, then add game name to list.

    I know about this games only: (tested on real ZX128+2 - grey)
    4x4 puzzle
    at4open
    black raven
    breditor
    death valley
    gambit< ...
    velesoft velesoft April 2008 Games
  • interface1discipleanyone manage to virtually connect two emulators running on the same machine? could zx spin be modified to replay two rzx files simultaneously? any o…

    ... an lcd screen - think the ula snow comes thru ?
    Roger Jowett Roger Jowett April 2009 Emulators
  • emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…

    ... but now dot crawl and ula snow - though these are not the ... reader please help
    the ula+ is only for the harlequin ... time or with the spectrum ula a whole third of the ...
    Roger Jowett Roger Jowett September 2010 Emulators
  • Strange behaviour in real hardware but not in emulatorsWell, at least not in any emulator I've tried. I've been reported by fellow forum member Macc that both our Maritrini Monster Slayer and Retroworks'…

    ... problem in emulators, unlike the ULA snow effect which can be reproduced ... between $C0 and $FF, the ULA gets confused and crashes can ...
    na_th_an na_th_an March 2012 Emulators
  • TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…

    ... frame (odd or even) the ULA is currently pushing out ?"
    ULA snow effect, and maybe prevent us ... external hardware, matching the addresses ULA is fetching at the end ... />
    I have bought the ULA book, but have not started ...
    RMartins RMartins August 2015 Development
  • 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. …

    ... here..

    didnt the snow effect only occur on the ... release. does spectaulator emulate this ULA snow effect?

    [ This Message ...
    Interceptor Interceptor August 2003 Emulators
  • 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. …

    Ramsofts' Real Spectrum emultor in DOS emulated the ULA Snow effect. Perhaps give that a try ?

    Regards

    Andy Barker
    Andrew Barker Andrew Barker August 2003 Emulators
  • 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. …

    ... />
    As Woody says, the snow effect appears when I is ... some letters repeat as the ULA got confused)

    (Woody ... reproduce this even with 'emulate ULA snow' turned on?)

    The ...
    Jon Needle Jon Needle August 2003 Emulators
  • 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. …

    [quote]
    On 2003-08-08 00:18, needlej wrote:
    (Woody - I couldn't get SPIN to reproduce this even with 'emulate ULA snow' turned on?)
    [/quote]

    GFX.SnowEffect := (Registers.I >= 64) and (Registers.I
    Woody Woody August 2003 Emulators
  • 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. …

    ... emultor in DOS emulated the ULA Snow effect.
    [/quote]
    ... 't actually emulate the ULA Snow, and I do know ... that SPIN's snow is derived from the ... actually known about the snow effect, this is the ... entirely possible that the snow in SPIN is borked. ...
    Dunny Dunny August 2003 Emulators
  • EmuZWin 2.5.0.1Version 2.5 Release 1.0 (10-Jun-2004): a lot of changes and fixes in ??? Map Builder ??? GFX Editor ??? Loading & Saving ??? Sound & Video ?? Speed…

    ... . A small bug produced some ULA snow (I can't believe you ...
    Dunny Dunny August 2004 Emulators
  • Suggestions for games to test emulators?I'm going to be doing a comparision of a few different emulators, and was wondering if anyone had good suggestions of games to use as a 'benchmark' t…

    ... />
    Not to mention the ULA snow effect it uses... You'll ...
    Dunny Dunny February 2005 Games
  • Suggestions for games to test emulators?I'm going to be doing a comparision of a few different emulators, and was wondering if anyone had good suggestions of games to use as a 'benchmark' t…

    What's the ULA snow effect, Dunny?
    +CotL-DS +CotL-DS March 2005 Games
  • Q on Gauntlet 3.Hey ... I have a working copy of Gauntlet 3 for Atari ST (STEEM emu) and have been working on a map for the ST version. I DLed all 3 of the Gauntlet…

    ... putting a checkmark next to "ULA snow effect" in SPIN -> Options ...
    Skarpo Skarpo April 2005 Games
  • Q on Gauntlet 3.Hey ... I have a working copy of Gauntlet 3 for Atari ST (STEEM emu) and have been working on a map for the ST version. I DLed all 3 of the Gauntlet…

    ... putting a checkmark next to "ULA snow effect" in SPIN -> Options ...
    Andrew Barker Andrew Barker April 2005 Games
  • Q on Gauntlet 3.Hey ... I have a working copy of Gauntlet 3 for Atari ST (STEEM emu) and have been working on a map for the ST version. I DLed all 3 of the Gauntlet…

    ... putting a checkmark next to "ULA snow effect" in SPIN -> Options ...
    Dunny Dunny April 2005 Games
  • Necessary +2A ROMsA +3 has 4 roms: Menu/Editor Syntax Checker +3DOS 48k BASIC I understand that a +2A is identical to a +3 but without a disk drive. It also uses …

    ... get the dreadfull "rain" (or "ula snow" as some call it) effect ...
    Tom-Cat Tom-Cat August 2005 Sinclair Miscellaneous
  • New CEZ GS game: COLUMNSFinally we've finished it!! After a long time coding, making graphics, musics and testing (as you could view in the forum if you know spanish -sorry-…

    ... are experiencing are probably the "ula snow" effect of the grey +2 ...
    Tom-Cat Tom-Cat October 2005 Games
  • New CEZ GS game: COLUMNSFinally we've finished it!! After a long time coding, making graphics, musics and testing (as you could view in the forum if you know spanish -sorry-…

    ... are experiencing are probably the "ula snow" effect of the grey +2 ... /> I have read about the "ula snow" but have not experienced it ...
    Timppa Timppa October 2005 Games
  • Egghead 4 available to downloadFollowing his adventure in space, Egghead is today Entertaining a guest. Yes, Shelley is coming to tea and it's up to Egghead to get the food on the…

    ... ) you get the before mentioned ULA Snow effect which renders the game ...
    Tom-Cat Tom-Cat April 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…

    ... reasonable approximation of the ULA Snow.

    ULA Snow has been found to ... we've called "snow contention" applied during snow periods too.

    Dunny Dunny July 2006 Emulators
  • RealXThis may be a dumb question but will RealX ever get released?

    ... a good understanding of how ULA snow really works. And in ... applied during this period is "snow contention".

    ... Your Snow documentation also states incorrectly that the address the ULA uses ... to build up the "snow" is formed ...
    Dunny Dunny July 2006 Emulators
<1234567…34>

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