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<1234567…34>
  • 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
  • Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…

    ... 't, they suffer from rain/snow/ULA bug/whatever you want to ...
    Jmk Jmk May 2013 Games
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... ULA? I think there may be answer to where the "snow ... Ramsoft incorrectly states that ULA doesn't stop CPU ... [LIST=1]
    [*]The ULA address drivers do not open ... I'm curious what exactly ULA is doing then.
    ULA. The address while bytefetch ...
    brian-82 brian-82 November 2007 Development
  • 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
  • ULA bug and snowI am tryng to improve the snow emulation in FBZX wii but I do not have a real spectrum to test the results. I used the information taken from Harele…

    ... am tryng to improve the snow emulation in FBZX wii but ... emultor is writing in the ULA video register the second screen ...
    Oibaf Oibaf August 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
  • +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]The ULA bug which causes snow when I is set ... .[/quote]

    Will the ULA bug appear on the Spectrum ...
    ajmoss ajmoss June 2010 Hardware
  • 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
  • Exact emulation of the Snow effectAs the original post on another forum is outdated, and for those who don't know about that forum, I duplicate this info here: At the beginning of …

    ... details of the exact snow effect emulation after publication ... was first implemented, and my snow effect tests, which are ...
    Now about the snow phases. Snow phase means how a 4 ... drawing cycle, the ULA works normal, without snow and duplicate.
    ...
    weiv weiv October 2022 Emulators
  • 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
  • WANTED: 128k+ or 128k +2(early grey mod.) ULA chipHello, Attempting to repair my 128k+ speccy. Needs a ULA(IC1)chip from either a 128k+ or an early +2 will work also. If anyone has this chip or has a…

    ... 128k+ speccy.
    Needs a ULA(IC1)chip from either a ... 's broken(other than the ULA), please give me a shout ...
    thomas3120 thomas3120 January 2003 Wanted
  • ULA schematicsHi everyone. Some while ago I remember getting hold of some circuit schematics of the innards of the Speccy 48K ULA. Sadly I've since lost the files…

    ... innards of the Speccy 48K ULA. Sadly I've since lost ...
    Laser Laser August 2005 Sinclair Miscellaneous
  • ULA?Just curious, what does ULA stand for - I'm guessing Ultra Large (Gate) Array?

    Just curious, what does ULA stand for - I'm guessing Ultra Large (Gate) Array?
    cg cg 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 …

    ... is controlled.

    The ULA controls output to the the ... need to change the ROM,ULA and add more RAM ?? or ...
    Saboteur Saboteur November 2005 Hardware
  • sound input causing dead ula in +2 ?I have a dead +2a (it shows static black screen, no border see: [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=9619&forum=4)"]http:/…

    ... /> I started to think why ula suddenly broke. 'Deadth' posted ... connected tape leads can damage ula.

    Also found ... 1b652469b2ff16c9?lnk=st&q=ula&rnum=18#1b652469b2ff16c9"]http ... 1b652469b2ff16c9?lnk=st&q=ula&rnum=18#1b652469b2ff16c9[/ ...
    Timppa Timppa November 2005 Hardware
  • ULA......Woooooo and ULA 160??'ello all from down under ! they don't know the speccy well this way it seems, anyways, picked up my brand new astra yesterday, and it's got some …

    ... plates on it

    ULA 160

    i'm ...
    bleugh bleugh November 2006 Sinclair Miscellaneous
  • 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
  • Reliable snow reports?Just booked a skiing holiday - anyone know of a *reliable* website that carries snow reports and details of piste conditions? Just did a load of web …

    Just booked a skiing holiday - anyone know of a *reliable* website that carries snow reports and details of piste conditions? Just did a load of web searching and got so many varying answers that made any info worthless.
    NickH NickH March 2007 Chit chat
  • ULA chipHi. Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ? Also looking for one 7805 heatsink... Thank

    Hi.

    Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ?
    Also looking for one 7805 heatsink...

    Thank
    Gods Gods May 2007 Wanted
  • UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.

    I remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board.
    It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ?

    Thanks.
    Gods Gods June 2007 Hardware
  • Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…

    ... want to know is the ULA the same from issue 3 ...
    MARKZX MARKZX July 2007 Hardware
  • Serching for ZX printer ULA and ZX interface I ULAIs there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is ca…

    Is there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is causing the problem.

    Is there anyone who can help?
    georgedb georgedb December 2007 Hardware
  • Snow in YanksvilleOK it snowed here in Indiana last night, I say this for my neck of the woods though I have no idea if the entire state got snow. Anyway I have 2 nig…

    ... if the entire state got snow.

    Anyway I have ... else in the states get snow?

    Beanz, USSpeccyfan, Klepto ... in Canada and you get snow all year round every day ...
    dm_boozefreek dm_boozefreek January 2008 Chit chat
  • Snow Joke z80 doesn't work?The z80 file for Snow Joke keeps giving an error message when you try to take the first object in the game: [url]http://www.worldofspectrum.org/info…

    The z80 file for Snow Joke keeps giving an error message when you try to take the first object in the game:

    [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0006990[/url]

    The tzx file works fine though.
    neoncherry neoncherry January 2008 Infoseek database
  • Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…

    ... gang..
    The Speccy 48 ULA Replacement is *almost* here ;)

    Anyway, the machine with ULA replacement doesn't quite boot ...
    csmith csmith April 2008 Hardware
  • 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
<1234567…34>

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  • ULA......Woooooo and ULA 160??'ello all from down under !<br /> <br /> they don't know the speccy well this way it seems, <br /> <br /> anyways, picked up my brand new astra yeste…
  • Let is snow let it snowFor those of use in the south and west of the country including those in Northern Ireland its going to be a snowy one tonight and tomorow.<br /> <br …
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone.<br /> <br /> I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where …
  • Serching for ZX printer ULA and ZX interface I ULAIs there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is ca…
  • 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.<br /> <br /> I know about this games only: (tested on real ZX128+…
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  • ULA snowHow is this feature implemented in emulators ? And how exact is the emulation ?<br /> I somehow supposed that ULA snow is something that is not very …
  • ULA bug and snowI am tryng to improve the snow emulation in FBZX wii but I do not have a real spectrum to test the results.<br /> <br /> I used the information taken…
  • ULA snow effectIt's wintertime, you know.<br /> <br /> [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F…

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