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Search Again :: Adv Search 1000 results in 0.017s
<1234567…34>
  • 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, …

    ... make sure I got the ULA timing 100% right. We know ... information about when the ULA actually fetches the screen ... I have prepared new test which can be used ... would run the ptime test from [URL="http://zxds ... late CPU timing, please run the btime test from the ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • MB03 UltimateDear ZX friends, you may have heard of MB-02+, probably the best disk interface for ZX Spectrum, originated back in the 90's. Although not much sp…

    ... interface for real Speccy (48/ 128). Some may object that it ... run diagnostic tool and test your Spectrum, memory ULA timing, etc.

    Hood Hood September 2019 Hardware
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ... read a bit in the ULA+ for test if supported. And the ... bits of displacement, and the ULA start the frame with the ...
    antoniovillena antoniovillena October 2011 Development
  • Help with Spectrum +2 or 128 (AY sound test) Hello, could you help me with something? It's like some "scientific experiments" with the [b]AY-3-8910[/b] / AY-3-8912 chips. I've bought on …

    ... Atari ST (YM2149) and Spectrum 128 (AY-3-8910). Some people ... have a ZX 48, not 128), I could also buy a ... on your Spectrum +2 or 128 to hear how it sounds ...
    farvardin farvardin September 2015 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... /> [QUOTE=Msx2;199951]Unfortunately spectrum 128+ does not have a blipper ... I don't have an 128+ to test it)....
    On 48K ... />
    Ι've never seen any 128+ ula's being sold separately on ... , this is not a Spectrum 128+ compatible ULA, this is for Russian ...
    gtsamour gtsamour July 2007 Hardware
  • Timex 2068 hi-color / hi-res modes.Hello. I know this is not a Timex forum but since it is a very close relative of the Speccy I thought I'd ask my question here. Does anyone know …

    ... ULA very compatible with the Spectrum?[/quote]In practice there were timing ... differences because the original ULA uses a ... they fixed it in the 128 ULA). So Timex used a clock ... for the standard Speccy ULA.[quote]I thought the ...
    chev chev November 2013 Sinclair Miscellaneous
  • Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…

    ... we actually testing the timing/speed?
    If ... then enables the CPU timing/speed to be checked. ... are derived from the ULA internal clock circuit, which ... 14MHz crystal or the ULA's internal clock and ...
    For a true timing test, a real external clock is ...
    1024MAK 1024MAK November 2014 Hardware
  • Timing_Tests-48k_v1.0 results...Hello All, I ran these [URL="http://www.zxspectrum4.net/op_timing.php"]tests[/URL] on my emulator and some of the tests failed.. so I tried it on a …

    ... As far I know this test is not for emulators, but ... emulator, which passes both Timing test and Woody test suite, with zero ... features is support for undocumented ULA artefacts (four bright shades), ... SpecEmu 3.1 can pass Timing Test with 100% accuracy, but ...
    Pegaz Pegaz November 2014 Emulators
  • Games that use multicolour effectsMulticolour (which created via ula timing, not screen switching) is the only functional effect that ULA can do. It's the only way to break colour cla…

    Multicolour (which created via ula timing, not screen switching) is the ... only functional effect that ULA can do. It's the ... .

    But it's timing dependant structure stricts their use ...
    Arda Arda October 2006 Games
  • +2A keyboard - different matrix effectMy friend test keyboard on ZX128+3, ZX128+2A, ZX128+2B and matrix effect (multikeys combination with mirroring) work incorrect (different as on origi…

    My friend test keyboard on ZX128+3, ZX128+ ... as on original ZX48/128/+2). Please test +2A/+3 keyboard with ... ) on yout +2A/+3 and test this keys combinations:
    [url ... +9+0

    sursor test:
    LEFT+UP+0
    velesoft velesoft December 2008 Hardware
  • Didaktik M (ZX Spectrum clone selling)Here is an offer to buy ZX Spectrum clone ( DIDAKTIK M ) from Slovakia, basic info: 100% functionality, Kempston & Sinclair joysticks connectors, tap…

    ... with Speccy due to different ula timing and other small differences. You ...
    promontory promontory May 2001 Sales
  • Detecting +3 or +2AIs it possible to detect whether your BASIC program is running on a +2A/+3 or a proper 128?

    ... machine" instead of "Sinclair 128" as that test comes later.

    128 machine is running in 48K ...
    Geoff Geoff August 2003 Sinclair Basic
  • Spectrum board Issue numbersWhilst cataloging my spectrums I am documenting the issue numbers of the motherboards. so far I have (all spectrum or smegtrum + Issue TWO 3 3B …

    ... 'dead bug' mod to the ULA timing - though a very few early ... 2's used the same ULA so also had this mod ...
    GP GP January 2004 Sinclair Miscellaneous
  • OT: Amstrad CPC GamesCan anyone recommend any platform games or isometric 3D games (such as Head Over Heels, Knightlore etc) on the Amstrad CPC, preferably games that wer…

    ... least not until the 128. So timing loops that were in place ...
    AndyC AndyC November 2004 Sinclair Miscellaneous
  • Good 128k games?As I only got my +2 in the twilight years of the spectrum and then discovered cider and Doctor and the Crippens (punk band), I never really had many …

    ... the original Speccy 128.

    DT Super test, Never Ending story ...
    Vampyre Vampyre January 2005 Games
  • How can I tell if 128k in codeIs there an easy way in code to check if the Spectrum has 128k, rather than 48k so I can display a message "Must have 128k" etc

    The best way to test what machine you're on ... 's an issue with timing, use a timing test. For this, set up ... nz, lp[/code]
    Then test the value of BC. I ... original page back in and test the byte. The value will ...
    icabod icabod March 2006 Development
  • NTSC for Speccy? What would happen?Hi doods. I was just reading a bit there about the TEA2000 video encoder. I'm just talking theory here. What would happen if you... Cut pins 12 an…

    ... (if such thing like NTSC 128 ULA exists at all)

    2 changes in ULA: 30 pics instead 25 pics ... per sec.
    For 48K ULA it would need different V ...
    piters piters July 2006 Hardware
  • +2 Test CardIs it possible to get this up on an emulator? This is the screen you got by pressing break and reset, the beepy thing with 1986s all over it. Where …

    The 128 (and +2) test card is stored near the ...
    chev chev August 2006 Emulators
  • Spectrum +2a Keyboard bug?If anyone has a Working +2a... I bought a +2a for Christmas 1986 with an 80 Column thermal printer from Dixons. It was bundled with a tape supposed…

    ... put it down to a ULA timing problem - I remember both Andy ...
    DEATH DEATH November 2006 Hardware
  • Spectrum Composite video connections?Is it possible to modify a standard 48K spectrum to give composite video output? In my experience i have found the quality of the picture out of the…

    ... case, this could mean faulty ULA chip (ferranti socketed chip, IC1 ... board since there's some ULA timing issue that was (apparently) never ... and not bother replacing the ULA, which you'll only get ...
    DEATH DEATH November 2006 Hardware
  • Nooooo my speccy died!??!!Hi! I am quite sad. :( Tonight I got a kempston interface so I rushed home to try it on my spectrum+ The edge connector of the interface was narrower…

    ... 40%
    ROM 40%
    ULA 10%

    I know ... fixed them, always changed the ULA then checked the voltages present ... voltages are present, change the ULA and test the computer. It may ... , the cause being a damaged ULA. Unlikely but possible.

    DEATH DEATH December 2006 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... /> Ι've never seen any 128+ ula's being sold separately on ... a solution since the ula on that one could ... is not a Spectrum 128+ compatible ULA, this is for Russian ... do need a new ULA, I have a few ... compatible with the 7K010E5 ULA in the Speccy 128.

    ...
    Phu Phu July 2007 Hardware
  • 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…

    ... /misc/timingtest-0.2.zip"]timing test[/URL] to include tests which ... the paging. Note that the test should be loaded in USR ...
    Patrik Rak Patrik Rak September 2007 Emulators
  • To Winston , diag-interface.Hello to all, first, sorry for my english i'm from spain and my english is very poor. Wiston, thank you very much for your great work "diag-interface…

    Hmmm. Can you video the entire test sequence (it should continue to do all 3 memory tests), and if possible a video of the screen when it does the ROM CRC/ULA interrupt test?
    Winston Winston November 2007 Hardware
  • DRAM (:baffled:)Hi, Can someone explain to me the definitive rules on DRAM access times in terms of suitability for a particular speed of processor? Specifically, …

    ... /> However, aiming for a "perfect" ULA timing, I intend to use an ... actual speccy ULA, which likes to output switched ...
    Phu Phu January 2008 Hardware
  • DRAM (:baffled:)Hi, Can someone explain to me the definitive rules on DRAM access times in terms of suitability for a particular speed of processor? Specifically, …

    ... ]However, aiming for a "perfect" ULA timing, I intend to use an ... actual speccy ULA, which likes to output switched ... . Note that the Spectrum's ULA actually exceeds the maximum refresh ...
    Winston Winston January 2008 Hardware
  • The definitive Spectrum project??We know that the Spectrum has been put almost to its limits after all these years of life, but I would like to know which would be the definitive pro…

    ... need to reverse engineer the 128 ULA).[/QUOTE]

    Oh I ...
    NickH NickH September 2008 Games
  • Keys don't work even with new membrane, HELP!Hi folks. I have a 1983 48k Zx Spectrum. It powers up fine, but none of the keys respond. I have tried fitting a new keyboard membrane from rwap, but…

    ... is right, you can test the board like he ... larger one.

    Test continuity from each pin on ... the keyboard connector and the ULA. But...

    ... this is unlikely. Also test continuity from the bottom of ... effort of finding another ULA to test with.
    Winston Winston February 2009 Hardware
  • plus3e simple ide interface problemhi, I prepared a 8bit simple ide interface 3 days ago, but I got problems (with or without ide cable connected). 1.First of all, I have to press re…

    ... test.
    - You might read what Ingo wrote about hot/weak ULA ... 's.
    - Test your intf on another ...
    roko roko February 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 (…

    ... boot, no INK change) so ULA contention issue would surely make ... , MDA demo (thats gorgeous using ula timing to mask out half of ...
    nuggetreggae nuggetreggae October 2009 Hardware
<1234567…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
128 9.4K 14.8K
ula 7.3K 13K
timing 3.3K 4.1K
test 14.3K 19.1K

Related Threads

  • New test for finding missing +2A/+3 ULA timing detailsHello,<br /> <br /> having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention patt…
  • What is difference between "128" and "128+"?What is the difference between a "Spectrum 128" and a "Spectrum 128+" ??<br /> <br /> And I am not talking about the different looking +2's, etc.<br …
  • Changing MP3's from 128+ to just 128I have a number of MP3's that are bigger than 128 bit rate and i want to convert them all in one go to 128. <br /> <br /> Could you guys recommend s…
  • 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…
  • 128 spectrum zx +2 is stuck on test screenhey this is my first spectrum i bought it from a boot-sale for 2 pound and it came with loads of games but when i turn it on i get the test screen an…
  • 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…
  • Where: ZX Printer ULA's and ZX interface I ULA'sIs there any source left for these ULA's? Alot of tings can be replaced, like the ZTX transistors and occasionally you can come accross a normal ZX S…
  • Can anyone test my Issue 2 ULA?Hi guys,<br /> <br /> Could anyone with a Issue 2 Speccy try whether my ULA works in theirs? I will obviously cover postage etc. Just want to know wh…
  • ULA TEST 3 results on real hardwareHi guys,<br /> <br /> I'm writing small spectrum emulator and I wanna implement precise emulation for different spectrum models :-)<br /> <br /> I fo…
  • List of 128 only games and 128 games that were different to the 48k versions.Can anyone think of any 128 games that were different to 48k and i'm not talking about music enhancments but more graphical,or speed or bigger maps e…

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