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Search Again :: Adv Search 1000 results in 0.014s
<1…14151617181920…34>
  • Composite Video Mod Capacitor ValueCouldn't find any thread where this has been asked before but I'm not convinced the search in this forum is the best...:) Due to the recent retire…

    ... is not there to improve signal quality, but to prevent a ... capacitor is fitted, the video output signal from the modified ZX Spectrum ... not comply with the composite video "standard". So this upsets ... low frequency parts of the video signal. At the same time, ...
    1024MAK 1024MAK July 2015 Hardware
  • another non working issue 3 48kHi all, next! :) I don't have good filings about this speccy :) https://youtu.be/D9qpCR18-kI here is short video what this speccy do. we hav…

    ... /> for not stable video signal i found in video part on mobo two ...
    gorski gorski July 2015 Hardware
  • ZX Spectrum+ adviceHey all, I just got a ZX Spectrum+ from eBay and I'm not sure yet what to do with it. I wanted to first take a peek inside, see what issue board it i…

    ... under power, using JoulesperCoulomb's video again. All voltages look right ... I wanted to test for video signal. Turns out that the original ... doesn't work for composite video (I didn't realize the ...
    lunarul lunarul August 2015 Hardware
  • Composite mod vs interfaceHey all, I was looking at the pinout for the edge connector of the zx and noticed that there are composite and component video signals available thro…

    ... not fitted, the composite video signal is not available at the ... can use the composite video signal at the edge-connector.< ... />
    The component video signals need further processing before ... advantage of doing the composite video signal mod. Is that users ...
    1024MAK 1024MAK August 2015 Hardware
  • ZX Spectrum+ adviceHey all, I just got a ZX Spectrum+ from eBay and I'm not sure yet what to do with it. I wanted to first take a peek inside, see what issue board it i…

    ... tricky :-(
    If the composite video modification has been done, a ... pick something up on the video output (I have never ... to test for a composite video signal is an oscilloscope.
    < ... vertical and a 15625Hz horizontal signal. Then you should get a ...
    1024MAK 1024MAK August 2015 Hardware
  • ZX Spectrum+ adviceHey all, I just got a ZX Spectrum+ from eBay and I'm not sure yet what to do with it. I wanted to first take a peek inside, see what issue board it i…

    ... tricky :-(
    If the composite video modification has been done, a ... pick something up on the video output (I have never actually ... to test for a composite video signal is an oscilloscope.[/quote]
    lunarul lunarul August 2015 Hardware
  • HD Video Converter for ZX Spectrum +3I recently bought [URL="http://www.amazon.co.uk/gp/product/B0092IAA3I?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00"]this[/URL] SCART to HDMI co…

    ... have to convert an analogue video signal to digital, then store a ... conversion or processing of analogue video signals will cause more noise ...
    1024MAK 1024MAK August 2015 Hardware
  • Display bandsHi all, I'm busy working on an issue 3 16k Spectrum I picked up on eBay. I've upped it to 48k and put a new membrane in. I noticed the display was…

    ... the design and of the video signal standard. But yours is much ...
    1024MAK 1024MAK September 2015 Hardware
  • Access to ZX81-Service ManualI need the ZX81-Service manual to repair my sick Zeddy. Unfortunately I don't get access to WOS documents via ftp. How can I register? For the ZX-S…

    ... "back porch" part of the video signal. The last ULA version, the ...
    1024MAK 1024MAK September 2015 Hardware
  • bmp2scrhttps://www.youtube.com/watch?v=zsjTpFR0oYQ converted for the sam coupe by using bmp2scr can anyone help Leszek Daniel Chmielewski ideally it onl…

    Roger, for your information, the video output of the SAM, the ... capable of producing an interlaced signal!

    Ignore all ... properly recognise a progressive scan signal and treats it as though ... non-compliant the SAM’s video signal is with PAL-I. If ...
    zub zub September 2015 Development
  • Was there a POKE that broke the SpectrumHi Everyone I've been recalling myths and rumours from back in the day. You know "Lunar Jetmans" trailer and that sort of thing. But one rumour …

    ... not produce a valid TV (video) signal. All TVs are designed to ... cope with the no signal condition. After all, the same ... someone unplugs/disconnects any other video source while the TV is ... by the input video signal, so a loss of video input is extremely ...
    1024MAK 1024MAK October 2015 Sinclair Miscellaneous
  • A few hardware questions regarding Z80 and eZ80Hi Guys, Maybe some of you could help me with these questions: I would like to know what is the actual file size limit that can be used by z80 …

    ... support chips to generate a video signal and this would likely be ...
    smogit smogit October 2015 Hardware
  • Display bandsHi all, I'm busy working on an issue 3 16k Spectrum I picked up on eBay. I've upped it to 48k and put a new membrane in. I noticed the display was…

    ... far too small for a video signal of this type. This ... bandwidth (frequency range) of the video signal (act like filter). The ... the high frequency AC signal from the power section inverter ... mix with the colour signal video frequencies causing strange effects.< ...
    1024MAK 1024MAK October 2015 Hardware
  • Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…

    ... stuff to help generate a video signal. Say, a framebuffer for example ... . Which would make generating video easy, and leave the cpu ...
    RetroTechie RetroTechie October 2015 Vega
  • Some downloads fail meI want download the schema of the Spectrum +2A and I can not because appears a user and password request in all links of "SCHEMATICS, MANUALS AND TEC…

    The sound is mixed into the video signal before it gets to the modulator.

    [b][i]Mark[/i][/b]
    1024MAK 1024MAK November 2015 Hardware
  • Some downloads fail meI want download the schema of the Spectrum +2A and I can not because appears a user and password request in all links of "SCHEMATICS, MANUALS AND TEC…

    ... then added to the video signal at the colour encoder chip ... either remove the sound signal from the video signal (cut, or desolder ... that the sound signal is mixed with the video signal at a ... picture when using the composite video signal that is available at ...
    1024MAK 1024MAK November 2015 Hardware
  • Best composite mod informationJust got my 16K (Issue 3) working. I'm in NTSC land so I need to run a composite signal through my PAL<->NTSC converter. I know there are a ton o…

    ... ). The result is a composite video signal.

    The ... modulator takes the composite video signal and mixes it with ... the composite video signal. Having got the composite video signal, the TV ... degradation of the analogue signal, and of course every ...
    1024MAK 1024MAK November 2015 Hardware
  • Were there other graphic modes for the ZX Spectrum?I've read that there was a "hi-color" mode that allowed the color clash to be 8x1 instead of 8x8. Maybe I have the name of that mode wrong. I'm…

    ... not allowed to build the video signal, (as in FAST mode) you ... there is officially only one "video mode".

    Then ... So that meant no special video graphics chips were to be ... Research, they developed their own video circuits and designed them into ...
    1024MAK 1024MAK November 2015 Hardware
  • velleman k8036 - Video signal cleaning?http://www.velleman.eu/products/view/?country=es&lang=en&id=348080 Although velleman reports having discontinued this kit and its primary use was …

    ... no special improvement to the signal of a ZX Spectrum suing ... to mask the macro vosion signal. A 4066 C-MOS switch ... to cut of macro vision signal. There is no need for ... circuitry to improve the Spectrums video signal.
    Ingo.
    ingo ingo November 2015 Hardware
  • Bluetooth ZX Spectrum - I may be alone, but I love it!Playing Hungry Horace on a big telly with this on my lap made me feel like a teen again! Happy happy days! Anyone else feel the love for it?

    ... ZX Spectrum to send 'composite' video signal which can be more appropriate ...
    Jim M Jim M November 2015 Hardware
  • Why is RGB the best?Sorry, I know my question may sound odd but I have been doing some reading lately and this has struck me. This is what we know: RF -> CVBS -> …

    ... is converted from the RGB video signal, which is split into three ... /> The S-video cable carries video using two synchronized signal and ground pairs ... of the video. Carrying the color information as one signal means that ...
    rtunes rtunes December 2015 Hardware
  • Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…

    ... that voltage levels in composite video signal drop (=darker), not a little ... regulators (or -converters) and in video encoder / ULA supply lines. A ... of series capacitor in composite video output. 47uF may work but ...
    RetroTechie RetroTechie December 2015 Hardware
  • Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…

    ... that voltage levels in composite video signal drop (=darker), not a little ... regulators (or -converters) and in video encoder / ULA supply lines. A ... of series capacitor in composite video output. 47uF may work but ...
    1024MAK 1024MAK December 2015 Hardware
  • Jiiira's Sparrow LITEHi All, Just for info .. :) big eprom, cheap 32KB ram and etc. i don't know specification .. :) https://youtu.be/NbI7E1aebrM modern speccy .. …

    ... not fit right .. :)
    video signal is bad like original speccy ... improvements:


    - video output is now the Composite ...

    - the video RAM is in single SRAM ... br />
    - the /RESET signal is done by TL7705 watchdog ...
    gorski gorski December 2015 Hardware
  • Harlequin Rev. G - Composite video problem.What I'm about to describe I'm not experiencing it by myself, so the probable answer to any "have you tested this or that" question is no, I don't, b…

    I am not familiar with the Harlequin or its specs but I can tell you that if a C=1084S gives a black and white picture with CVBS then it's because the video signal is not PAL standard.
    Renegade Renegade January 2016 Hardware
  • 128 +2 grey, no video but still beepsGot a grey 128 from ebay, im using a 48k spectrum powers supply, all voltages seem ok. I cant get compostie video using the normal mod or from the 8…

    ... /> looks like the spectrum rgb signal was never fully complaint and ... able to create a composite video signal, same chip is used in ...
    Level20 Level20 February 2016 Hardware
  • 128 +2 grey, no video but still beepsGot a grey 128 from ebay, im using a 48k spectrum powers supply, all voltages seem ok. I cant get compostie video using the normal mod or from the 8…

    ... display the composite sync signal as the composite video signal (which it effectively ... is - just a video of a ...
    guesser guesser February 2016 Hardware
  • Emulator developmentHi, Could anyone explain or direct to a link that explains in not to technical terms how an emulator is developed. It has always blown my mind eve…

    ... , processor, keyboard and i/o, video generator. Then work out what ... not doing an accurately timed video signal. Instad, at some point equivalent ... 50Hz interrupt, just grab the video memory and converting it into ... fetching memory to form the video signal.
    joefish joefish March 2016 Emulators
  • Bizarre ZX Spectrum faults (also possibly relevant to Spectranet compatibility problems).I'm attempting to repair an issue 4A 48K ZX Spectrum and am encountering some very strange problems. For my own records I've given this computer the …

    ... Vcc lines that reach the video signal. If you use the ... the pin corresponding to the video signal at the modulator input of ... H) in series to the video signal to cut high frequency ( ... spikes) from the video signal.

    The principle ...
    ingo ingo April 2016 Hardware
  • So for my first trick...I'm sure people have already used the AD724 or AD725 on other 8 bit machines, and i know the Harlequin uses the 724, but not seen anyone trying to us…

    ... the ULA but by the signal processing of the analog input ... TEA2000 that reduces interference between video signal and colour carrier then the ... TEA2000 gives very good composite signal comparable to that of the ...
    ingo ingo May 2016 Hardware
<1…14151617181920…34>

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