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Search Again :: Adv Search 632 results in 0.001s
<1…16171819202122>
  • Spectrum +2 (grey): Mod- and operation- related advices needed.Dear Sirs and Ladies, Please welcome a newbie to the “World of Spectrum” (both to the forum and, well, metaphorically). I’ve recently purchased a…

    ... couple of meters and a oscilloscope.

    Highly unlikely the ...
    1024MAK 1024MAK October 2016 Hardware
  • AY Sound Effects from WAVI'm wondering if someone has crossed this bridge already. There are a bunch of sampled sound effects in wav form that need converting to the AY ch…

    ... best matches the input sampled waveform. So this is something you ... noise generator to match the waveform.

    The sound effects ...
    Alcoholics Anonymous Alcoholics Anonymous October 2016 Development
  • Meddling with the RGB signal - any experts out there?A few questions, if anyone knows - is it OK to split the A/V signal and feed it to two TVs? I'm assuming that it's not OK to do this with the RGB …

    ... signal is a more complex waveform; will splitting it between two ...
    joefish joefish October 2016 Hardware
  • Meddling with the RGB signal - any experts out there?A few questions, if anyone knows - is it OK to split the A/V signal and feed it to two TVs? I'm assuming that it's not OK to do this with the RGB …

    ... signal is a more complex waveform; will splitting it between two ...
    1024MAK 1024MAK October 2016 Hardware
  • 'computer compatible' tape recorders?I have seen these a couple of times for sale, but what exactly do they do (differently form the regular type) ? [URL=http://s1063.photobucket.com/…

    ... />
    With the modulated data waveform from a computer (the output ...
    1024MAK 1024MAK November 2016 Hardware
  • A BEEP program I want to make in Basic. Helpful remarks gratefully receivedI want to explore the possibilities of the BEEP command. So I need to be able to try different combos of pitch/duration and sequences of same. I'm tr…

    ... a visual representation of the waveform.

    This is what ...
    mik3d3nch mik3d3nch November 2016 Chit chat
  • Games ThoughtsJust got round to playing my real spectrum in anger, and here are some thoughts about the games I have played so far. Scrable - the tape didn't load…

    I know what that is actually, it looks it does basic wave synthesis by adding the two waves together giving you the resultant waveform. If it also played the waveform it would be cool but I doubt it !
    ivanb303 ivanb303 November 2016 Games
  • ZX Spectrum 48k output yellow and jumpyI have a ZX Spectrum that I modded for composite output a few years a go. Lately they output started to be a bit jumpy during the first half hour. Th…

    ... you have access to an oscilloscope, it's just a matter ...
    balford balford January 2017 Hardware
  • ZX Spectrum 48k output yellow and jumpyI have a ZX Spectrum that I modded for composite output a few years a go. Lately they output started to be a bit jumpy during the first half hour. Th…

    ... you have access to an oscilloscope, it's just a matter ...
    kenwonders kenwonders January 2017 Hardware
  • Dump Original ZX81 TapesHi to all there. Me and my friend Max that are preserving QL STUFF we are dumping ZX81 tapes. I've many MIA's. How is the best way for creat…

    I've tried with 81 emu and other programs but is very difficult to make the waveform become good for a TZX.

    But we have done it ;)

    Thanks a lot.
    ranma_simon ranma_simon February 2017 Sinclair Miscellaneous
  • Repair Zx Spectrum +2 Blackhello there, just found a Zx Spectrum +2 Black edition Issue 1 board that doesnt appear anything on the screen, even led dont power on,i have tes…

    You need an oscilloscope and have a look if any of video signals is going out of the ULA (40077).

    Is any IC getting hot?
    Claudius Claudius February 2017 Hardware
  • Repair Zx Spectrum +2 Blackhello there, just found a Zx Spectrum +2 Black edition Issue 1 board that doesnt appear anything on the screen, even led dont power on,i have tes…

    [quote="Claudius;897126"]You need an oscilloscope and have a look if any of video signals is going out of the ULA (40077).

    Is any IC getting hot? [/quote]

    no i have check them all
    xaris_sm xaris_sm February 2017 Hardware
  • [NEW] Speccy for Android ReleasedHello, All! A while ago, I have released the Android version of [i]Speccy[/i], my ZX Spectrum emulator. It emulates Spectrum 16k, 48k, 128k, +2, +2A…

    ... uses effective power of a waveform.

    Have fun ...
    fms fms March 2017 Emulators
  • Harlequin 128K minor problems.....Hi All, I've just assembled my Harlequin 128K kit, I had initial problems with it that I traced to not having soldered all of the pins on a couple…

    ... the test pattern with an oscilloscope.

    Greetings

    ingo ingo March 2017 Hardware
  • [NEW] Speccy for Android ReleasedHello, All! A while ago, I have released the Android version of [i]Speccy[/i], my ZX Spectrum emulator. It emulates Spectrum 16k, 48k, 128k, +2, +2A…

    ... /> ALL CHANGES:
    * Computing effective waveform power in MIDI playback and ...
    fms fms March 2017 Emulators
  • Harlequin Rev G - Decoupling Capacitors?Guys - I started assembling my Rev G Harlequin board over the weekend. Right after I picked it up and started loading parts, it struck me that there…

    ... joystick interfaces, IF1bis). Measurements with oscilloscope showes clean signals.

    ingo ingo March 2017 Hardware
  • Kempston interface schematic: wrong IC?Hi! I'm trying to learn about the inner workings of the speccy, and I thought that building a kemspton interface would help me learn about things lik…

    ... and a very ghetto DIY oscilloscope (JYE DSO138). I'll have ...
    Mikelone Mikelone March 2017 Hardware
  • Disabling the ROM without removing the whole thingHi! I've got my hands on a non-working issue 6a. I suspect the ROM may be bad, but other things may be faulty as well. I've read that in an otherwis…

    ... . You do need a multichannel oscilloscope or logic analyser for this ...
    1024MAK 1024MAK April 2017 Hardware
  • The BUSH cassette player CRS-132 Not for the Spectrum???So - I needed a new tape player for loading my spectrum games - and I thought - 'why not buy a brand new one - rather than an old machine which may h…

    ... , using a multimeter and an oscilloscope. Save yourself the pain and ...
    Tank Tank April 2017 Hardware
  • Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…

    ... on the screen of an oscilloscope), and draw a horizontal line ...
    RetroTechie RetroTechie April 2017 Development
  • ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …

    ... external power supply, logic tester, oscilloscope etc.

    Yes bank ...
    RetroTechie RetroTechie April 2017 Hardware
  • Talk about time consuming!This is an aside, not a request or a grump, just an observation. Yesterday I cut and pasted all the messages from BASIC relating to my struggl…

    ... to side would change the waveform.....Summat like that?
    ASH-II ASH-II May 2017 Chit chat
  • Repair ZX Spectrum +2 black issue 1Hi all, after a long time i will try to repair a ZX Spectrum +2 black i found the last days i know for sure that CPU is damaged (already repla…

    ... .
    Do you posses an oscilloscope and ideally an EPROM-burner ...
    Mad Fritz Mad Fritz June 2017 Hardware
  • Repair ZX Spectrum +2 black issue 1Hi all, after a long time i will try to repair a ZX Spectrum +2 black i found the last days i know for sure that CPU is damaged (already repla…

    ... 11, then use ideally an oscilloscope to check if composite video ...
    Mad Fritz Mad Fritz June 2017 Hardware
  • ZX Nuvo 128..Hi There, I have built the ZX Nuvo 128 by Superfo, but it has a problem. The machine is working, but the video signal is completely bonkers. I've …

    ... see below captures from an oscilloscope:
    Pic 1. - yellow - the ...
    Claudius Claudius June 2017 Hardware
  • ZX Nuvo 128..Hi There, I have built the ZX Nuvo 128 by Superfo, but it has a problem. The machine is working, but the video signal is completely bonkers. I've …

    ... see below captures from an oscilloscope:
    Pic 1. - yellow - the ...
    1024MAK 1024MAK July 2017 Hardware
  • Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…

    ... test gear (meter, logic probe, oscilloscope) so it's better to ...
    1024MAK 1024MAK July 2017 Hardware
  • Issue with TV signal + Inductor Coil (16K Issue 2 Speccy)Hello guys, I just got a 16K Issue 2 Speccy from eBay. It was sold as not working so I knew there would be some work needed before it's working ag…

    ... here is a AC pulse waveform, NOT a DC voltage.
    1024MAK 1024MAK August 2017 Hardware
  • ZX Spectrum 48K it only shows colored barsHello, I'm new to the forum and I need help with a ZX Spectrum 48K which I bought recently unfortunately defective. I want to mention that before t…

    ... check something with this mini-oscilloscope? (I just assembled one.. I ... .ebay.com/itm/DSO138-Digital-Oscilloscope-Kit-DIY-kit-parts-Acrylic ... should be made to the oscilloscope and which pins should be ...
    Trafic Trafic August 2017 Hardware
  • Using a digital voice recorder as tape recorderI've been on a second hand store and I've seen a cheap Olimpus DS150 digital voice recorder. That thing has mic and ear plugs, and PC interface (=it …

    ... sampling rate. Reproducing an analogue waveform from one which has been ...
    namtip namtip August 2017 Hardware
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