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Search Again :: Adv Search 1000 results in 0.006s
<1234567…34>
  • Timing in loading routinesJust for curiosity I have done some experiments with SAVE command in accurate emulators, and then analyzing the generated WAV and I have obtained lit…

    ... one.

    All this timing is for 48K machines. The ... . If we take the 128K clock (3.5469), the numbers are ...
    antoniovillena antoniovillena February 2013 Development
  • TimingHey All, Is their away of obtaining timing information on ZX128k other than addresses 23672->23674. Basically I would like to identify every 100th …

    ... /> Is their away of obtaining timing information on ZX128k other than ...
    GBNvK GBNvK January 2004 Development
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... , as well as correct any timing information stated above. I would ...
    Patrik Rak Patrik Rak September 2007 Emulators
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... I added support for Pentagon timing instead, so I can finally ... the floating bus behavior and timing. An explanation how the ULA ...
    Patrik Rak Patrik Rak November 2007 Emulators
  • 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…

    ... board, sorting out some irritating timing glitches and getting sidetracked researching ... quite boot up yet - some timing issue - perhaps due to the ... device and not providing a clock swing that the CPU likes ...
    csmith csmith April 2008 Hardware
  • Timing... in the CSS faqI was looking at the CSS faq for something completely unrelated and noticed: [quote] Then the 192 screen+border lines are displayed, followed by 56 …

    ... be seen by taking a clock program, and running it for ...
    Winston Winston July 2008 Hardware
  • I've successfully created swf clockI was advancing by this tutorial : [url]http://forum.mobiles24.com/showthread.php?t=12361[/url] and I've created a theme with swf clock : [url]htt…

    ... created a theme with swf clock :

    [url]http://www ... title screen there appear digital clock with seconds.
    bohusk bohusk April 2009 Chit chat
  • 48k Timing Tests...Here's v1 of the timing tests for the 48k Spectrum, with a little background [IMG]http://www.zxspectrum4.net/images/timing_test_v1.jpg[/IMG] [URL="…

    Here's v1 of the timing tests for the 48k Spectrum, ...
    Richard_Butler Richard_Butler April 2010 Development
  • So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…

    ... Spectrum's 3.5MHz clock.

    Clock *dividers* are easy, and ... in sync with the master clock.

    The method: ... bottom is the 4MHz reference clock.

    [img]http:// ... circuit which is the reference clock. (The two capacitors are ...
    Winston Winston June 2010 Hardware
  • VCF report and photosNot sure where to put this, exactly...but here it is, what went on at the Vintage Computing Festival at Bletchley Park last weekend. Finally I've fo…

    ... shown here running a very timing sensitive demo. Chris's stand ... still: a very early digital clock, built from relays and uniselectors ...
    Winston Winston June 2010 Sinclair Miscellaneous
  • A 30th Anniversary ProjectHappy new year (belatedly...) So with the 30th anniversary approaching, I've decided to do a hardware project to celebrate it. Something hands-on (o…

    ... biggest that would fit!) The clock for the counters is external ... since the Spectrum's clock output gets halted every time ... (so isn't reliable for timing, at least without making things ... used in this design). The clock generator will get epoxied to ...
    Winston Winston January 2012 Hardware
  • Imperica Horizons - The whole weekend :-)So now it's all over, I'll do a quick writeup... It all started for me at 5.20 am. Getting to London from Devil's Island isn't so easy now that Aer …

    ... be only one 8 o'clock per day, and having two ... on the Spectrum ULA, colour timing tricks and the various optimizations ...
    Winston Winston May 2012 Sinclair Miscellaneous
  • Most accurate timingWhich emulator is closest in timing to an actual (48k) spectrum? A count to 10,000 loop, printing the loop number each time on screen - same snapsho…

    Which emulator is closest in timing to an actual (48k) spectrum?< ... />
    Hmm.
    Getting accurate timing for sound is going to ...
    Gedlion Gedlion June 2012 Emulators
  • Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…

    ... regenerate the Spectrum's clock signal despite contention. However ... produce the regenerated Spectrum clock, a stable and ... - one counting Spectrum clock cycles since contention started, ... and one counting regenerated clock cycles since contention started ...
    Winston Winston September 2012 Hardware
  • Timing of Timex Computer 2068Is the timing of the Timex Computer 2068 fully documented yet? I have one here with the ZX Spectrum Emulator cartridge and have downloaded a few test…

    Is the timing of the Timex Computer 2068 ... 6C001 ULAs. The contended memory timing seems to be the same ... ; however the I/O timing is quite different, not least ... test the contended I/O timing. Plenty of other ports should ...
    rga24 rga24 April 2013 Hardware
  • DivMMC clock bufferI have completed the first DivMMC EnJOY today: [url]http://www.worldofspectrum.org/forums/showthread.php?t=44238[/url] But there is a problem with t…

    ... is a problem with the clock boost circuit.

    Mario ...
    bverstee bverstee July 2013 Hardware
  • ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…

    ... problems with the ZX Spectrum clock signal.
    With the ... this testing I tried another clock inverter solution from Ingo Truppel ... with the DivMMC with this clock inverter.


    ...
    This gives a perfect clock signal by default:

    bverstee bverstee September 2013 Hardware
  • Nasty 'Gotcha' for multicolour timingI thought I would be better developing my multicolour routine on the 48K first, being the slowest, so it would then be sure to work on the 128K varia…

    ... awkward it even throws up timing differences between the 128K and ...
    joefish joefish October 2013 Development
  • New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …

    ... sure I got the ULA timing 100% right. We know when ... uses early or late CPU timing, please run the btime test ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…

    ... =5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U ...
    1024MAK 1024MAK June 2014 Hardware
  • populated Harlequin Rev.D -> Rev.FHi, I like to sell my Harlequin Rev. D board. I modified it to be identical to Rev. F: * switching regulator instead of linear regulator for DC in …

    ... SCART
    * correct hsync timing
    * correct clock phase at edge connector ...
    ingo ingo June 2014 Sales
  • My attempt to restore the CPU clock signalI know Winston has already got this, but I can't see any thread with details about it. Only wanted to share my (still early) results. I'm not taking…

    ... reshaping the ugly shaped clock signal available from the ... description of the simple clock restorer. It takes two ... wire mclk, // 28MHz input master clock
    input wire cpuclk_in_n, // ... 3.5MHz, clock stalled sometimes at low level ...
    mcleod_ideafix mcleod_ideafix September 2014 Hardware
  • Question of contentionI'm not desperate to go digging through technical descriptions in depth, but one thing bugs me about the Speccy's video contention model - and that's…

    ... , there's 224 T (224 clock ticks) per line of the ... there some odd stop-start timing thing going on between pairs ...
    joefish joefish January 2016 Hardware
  • Random Numbers, USR Return Values & Timing BASICI've been trying out Jon Ritman's random number routine, published in Your Sinclair Aug'87. Apart from a timing comparison I also did a frequency ana…

    ... Aug'87. Apart from a timing comparison I also did a ... />
    Here's the BASIC timing routine which I use. The ... in line 9994. The first timing should be done with 9994 ... get the loop overhead. The timing for that is then deducted ...
    Battle Bunny Battle Bunny January 2017 Sinclair Basic
  • Spectrum 48k Clock SpeedSo I was reading the [url="http://www.worldofspectrum.org/pub/sinclair/technical-docs/ZXSpectrum48K_ServiceManual.pdf"]Spectrum 48k Service Manaul[/u…

    ... ? The ULA gets a 14MHz clock but doesn't it divide ...
    msansom msansom February 2017 Hardware
  • Digital Clock in Game of LifeY'know Conways Game of Life? A [url="http://www.worldofspectrum.org/infoseek.cgi?regexp=^Life$&pub=^Sinclair+Research+Ltd$&loadpics=3"]version[/url] …

    ... /questions/88783/build-a-digital-clock-in-conways-game-of-life ... /111932#111932"]digital clock.[/url]

    [img]https ...
    Zoffy Zoffy March 2017 Chit chat
<1234567…34>

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