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  • 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 (…

    hmmm, if your RAM was bad, it'd probably hang on boot when it does a check.

    It looks a little like the kind of problems you'd expect with RAM contention problems? You got a spare ULA you can swap out to eliminate that as the cause?
    Andy Severn Andy Severn 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 (…

    ... , no INK change) so ULA contention issue would surely make black ...
    nuggetreggae nuggetreggae October 2009 Hardware
  • Monkey Island On Speccy...I would love to see Monkey Island on the speccy...think it can be done...not as much detail or graphics...but along the same story lines.... What ot…

    ... taken from emulator, isn't ir right?

    Amazing Rocketeer ...
    Ivanzx Ivanzx October 2009 New game ideas
  • AY interface - How many possibilities?Currently the newest AY interface available for sale gives 16K and 48K owners a chance to add AY sound to their Speccy, but (correct me if I'm wrong)…

    ... identical Spectrums, the amount of contention is very consistent over time ...
    BloodBaz BloodBaz October 2009 Hardware
  • AY interface - How many possibilities?Currently the newest AY interface available for sale gives 16K and 48K owners a chance to add AY sound to their Speccy, but (correct me if I'm wrong)…

    ... identical Spectrums, the amount of contention is very consistent over time ...
    gasman gasman 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…

    ... to access it (known as contention). Having the display file memory ...
    Alcoholics Anonymous Alcoholics Anonymous November 2009 Development
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... think it'll need a contention cycle if the ULA is ...
    Winston Winston November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... ULA port, with the same contention as the existing ULA port ... is significantly easier to handle contention etc (of which there will ... reason for this is handling contention on the palette RAM. This ... update the palette will cause contention, so to avoid issues, ...
    csmith csmith November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... is significantly easier to handle contention etc (of which there will ...
    Winston Winston November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... get the port issue sorted - contention information (with high accuracy) will ... know how this will affect contention. ULA contention on even ports is ...
    Dunny Dunny November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... was trying to determine the contention timing for you all ;-)< ... speccy, then no problem. No contention.

    If the ... ink and paper colours. Eeek! Contention.

    [b]Border ... relies on a particular palette contention model and access timing (ie ...
    csmith csmith November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... updates, as there will be contention to deal with in the ...
    csmith csmith November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... changed, and there will be contention somewhere. That's all.
    contention excepted), or very shortly afterwards ...
    csmith csmith November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... pixel display area to avoid contention with you wonderful chaps who ... , because we want to avoid contention with the palette updates. Loading ... if we want to avoid contention. Doing so when the CPU ...
    csmith csmith November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... pixel display area to avoid contention with you wonderful chaps who ...
    joefish joefish November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... -scanline and its affect on contention. My question then is, do ...
    Arjun Arjun November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... -scanline and its affect on contention. My question then is, do ...
    csmith csmith November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... would mean implementing a second contention model for the new ula ...
    csmith csmith November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... early stage of development, and contention timing. Everything else about the ...
    csmith csmith November 2009 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... learn and work with the contention and timing, and just trust ...
    joefish joefish November 2009 Emulators
  • just thinking about ...compo for zx 16k ? anyone ?

    You could call it the Contention Competition, since all the lower ...
    chev chev November 2009 Development
  • just thinking about ...compo for zx 16k ? anyone ?

    ... ]You could call it the Contention Competition, since all the lower ...
    Fikee Fikee November 2009 Development
  • Bad of game genre in WoSGame: Skladacka, current genre type: Action, correct genre type: Text game Sorry i dont know where to report this.

    no worries,

    [url]http://www.worldofspectrum.org/forums/forumdisplay.php?f=24[/url]

    ir normally the place to report it but they'll see this no doubt :)
    fog fog December 2009 Infoseek database
  • More colours in existing games?I have been trying to follow the various threads about the new ULA and more colours. I don't understand quiet a lot of it as back in the day all I di…

    ... too. Currently documenting the CPU contention, which is proving tricky to ...
    csmith csmith December 2009 Emulators
  • Have Sony lost the plot ?I have had some money for Christmas from my mum and dad and as always I will use it to buy myself something I normally wouldn't consider. So I thoug…

    ... . But at least we have IR-Shell, which has support for ...
    Shadow Maker Shadow Maker December 2009 Chit chat
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... hat, and maybe the memory contention could have been avoided?), but ...
    ewgf ewgf December 2009 Emulators
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... fetch by the program causes contention while the screen draws and ... 't properly deal with two contention events close together if it ...
    Alcoholics Anonymous Alcoholics Anonymous January 2010 Games
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... fetch by the program causes contention while the screen draws and ...
    Jmk Jmk January 2010 Games
  • Best Spectrum game from 2009Ok, its almost 2010, and we have to decide which was the best game this year :) Miles Mad Mission [url]http://www.worldofspectrum.org/infoseekid.cg…

    ... similar. The lack of memory contention gives them a boost over ...
    joefish joefish January 2010 Games
  • Best Spectrum game from 2009Ok, its almost 2010, and we have to decide which was the best game this year :) Miles Mad Mission [url]http://www.worldofspectrum.org/infoseekid.cg…

    ... , with close timings and memory contention. Second generation (1990-1995), including ... Pentagon, has no memory contention and different timings (because it ...
    Shiru Shiru January 2010 Games
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HitBox

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ir 234 292
contention 1.4K 2.4K

Related Threads

  • Z80 cycle contentionHi,<br /> Does anybody knows exactly when the ula halts the Z80 clock during a memory r/w cycle?<br /> I mean which Z80 clock cycle, T1 or T2?<br /> …
  • Memory Map/ContentionHi <br /> I'm new to speccy coding (well I did some z80 coding a few years back - like 20yrs ago :) ), and I'd like to get back into writing some scr…
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  • Contention: LDI vs LD (ss), rAccording c.s.s. FAQ:<br /> <br /> instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b]<br /> and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b]<br /> …
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