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<1…13141516171819…34>
  • We could design the LokiWouldn't it be great... if this community would develop what Sinclair himself started but was never finished: a successor of the 128K with 'cartoon l…

    ... an off-the-shelf MSX video chip, I'd suggest going ... it can do a smooth horizontal scroll. The machine you'd ... .

    As for the video connector of choice these days ... using a ten year old video recorder, but you wouldn't ...
    Matt_B Matt_B March 2014 Hardware
  • C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…

    ... 15 kHz refers to the horizontal sync frequency.

    It ... broadcast system M have a horizontal sync frequency of 15.75 ... but in NTSC-M broadcast video the framerate is actually 29 ...
    guesser guesser April 2014 Chit chat
  • C64 for the PiSomeone is writing the C64 natively for the Rasberry Pi and it looks amazing. I hope this will make someone do a ZX Spectrum too. Take a look its a…

    ... 15 kHz refers to the horizontal sync frequency.

    It ... broadcast system M have a horizontal sync frequency of 15.75 ... but in NTSC-M broadcast video the framerate is actually 29 ... don't see (sorry!). Is 'horizontal sync frequency' the frequency you ...
    ewgf ewgf April 2014 Chit chat
  • +2 Grey Composite question.Hello all, Long time reader first time poster and all that...... Probably a daft question which has been asked hundreds of times, even though I ca…

    ... connecting via composite correct the "horizontal hold" problem with the picture ... round to the intricacies of video signals.


    Cheers ...
    Ricardo99 Ricardo99 April 2014 Hardware
  • +2 Grey Composite question.Hello all, Long time reader first time poster and all that...... Probably a daft question which has been asked hundreds of times, even though I ca…

    ... connecting via composite correct the "horizontal hold" problem with the picture ... very much depends on your video capture card.
    The Spectrum ... produces a video signal that does not fully ...
    1024MAK 1024MAK April 2014 Hardware
  • Why was the Speccy screen displaced?Okay, so maybe this has been discussed before but no idea what search terms to look for. I just watched a YouTube video of someone filiming himself …

    ... a fancy pants oscilloscope with video triggering that can measure ... did take some measurements from video stills that capture the ... should still be in the horizontal blanking period... Most likely I ... around to setting up a video line triggering circuit again ...
    guesser guesser April 2014 Sinclair Miscellaneous
  • Why was the Speccy screen displaced?Okay, so maybe this has been discussed before but no idea what search terms to look for. I just watched a YouTube video of someone filiming himself …

    ... /> I just watched a YouTube video of someone filiming himself using ... screen left. However, the Spectrum horizontal counter is a complicated creature ...
    rga24 rga24 May 2014 Sinclair Miscellaneous
  • Spectrum screen layoutSeeing the thread on displacement I was wondering why the spectrum had the stupid screen split into three sections and the addresses for each section…

    ... . In particular, see Chapter 15, 'Video Addressing'.

    Fundamentally, the ... only during the border areas (horizontal and vertical) and during retrace ... out of 16 of a video memory pixel address must be ...
    zub zub May 2014 Sinclair Miscellaneous
  • Why are rotozoomers on C=64 so fast ?Hi, I noticed rotozoomers on C64 are really fast. I'm not the best coder on Speccy but I know my pet I never succeed to do rotozoomer (or rotating ch…

    ... no sprite (or other specialised video) hardware, more colours equals more ... the compromise. It halves the horizontal resolution (clever sprite related tricks ...
    RobeeeJay RobeeeJay June 2014 Development
  • Speccy & ZX81 on an LED MonitorI've been upgrading my Sinclair kit to Composite output, and they both work pretty well now - the Zed better than the Speccy if I'm honest. I want t…

    ... line, 15625Hz horizontal (line) frequency, 50Hz vertical frequency specification video signal. The ... LCD TV that has composite video and a SCART socket. Even ...
    1024MAK 1024MAK July 2014 Hardware
  • Did you know.. Disciple edge connectorDid you know the edge connector used on the Disciple is actually identical to that from the Interface 1? [IMG]http://www.benophetinternet.nl/hobby/v…

    ... angle (can't live with horizontal position) and attach my ... lower part and PCB is horizontal but the upper keyboard ... , joysticks, mouse, Composite-out video connector, tape connectors, Plus D ... parrallel connector, Composite-in video connector for VIDI-ZX and ...
    geosiou geosiou September 2014 Hardware
  • New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…

    ... world from messing up the video signal.

    ... baseband (composite, s-video and RGB video) frequencies, where it ... get involved in sending video more than several hundred ... black level, white level, horizontal and vertical synchronization information. Then ...
    1024MAK 1024MAK September 2014 Hardware
  • New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…

    ... world from messing up the video signal.

    ... baseband (composite, s-video and RGB video) frequencies, where it ... get involved in sending video more than several hundred ... black level, white level, horizontal and vertical synchronization information. Then ...
    Renegade Renegade September 2014 Hardware
  • Flickering RGB -> SCART output.Hello all, For my toast rack I have bought a [URL="http://www.ebay.co.uk/itm/Sinclair-ZX-Spectrum-128K-High-Quality-RGB-Scart-Lead-Video-Cable-TV-Le…

    ... .5 = 7.0938 MHz. he horizontal counter counts up to 456 ... don't fit in any video standard)

    Sometimes I ...
    mcleod_ideafix mcleod_ideafix November 2014 Hardware
  • 128k Toastrack Composite Video output confusion!Hi everyone. Ok, so I have a couple of 48k's that I have performed Wombles fantastic composite mod on. They work great here in Canada on my big scre…

    ... Spectrum will produce a 15625Hz horizontal (line rate), 50Hz vertical rate ... as 625 line or 576i video) using the PAL colour encoding ...
    1024MAK 1024MAK December 2014 Hardware
  • Speccy Vs Amstrad CPC Vs C64I hope no one minds me posting this here as well as in the announcements section. I'll delete it if there is a problem. It's childish fun but can I …

    ... got a video chip that can do a smooth horizontal scroll. You ...
    Matt_B Matt_B December 2014 Games
  • 3.4 Inch TFT with 48k Spectrum....hmmm?Hey guys, So I have been playing around with the idea of using a small LCD with composite input for a 48k Speccy. I got hold of one of these relat…

    ... (the brightness/monochrome part)
    Horizontal (line) sync
    Vertical ( ... to 100uF) allows the composite video signal through.

    ... a bodge really. In most video amplifier designs, you want a ... get one of the two video modules from Sell My Retro ...
    1024MAK 1024MAK February 2015 Hardware
  • 2015 Games ListHi, this is the thread I use for the 2015 Games List. Note: Due to forum update policies, the latest version of the list will always be found somewh…

    ... ROM Disassembly [Link]

    * Video on ZX-TEAM Meeting 2015 ... Mar 2015

    Stormfinch (Horizontal shoot-em-up, multicolour, nirvana ...
    Timmy Timmy June 2015 Games
  • 2015 Games ListHi, this is the thread I use for the 2015 Games List. Note: Due to forum update policies, the latest version of the list will always be found somewh…

    ... ROM Disassembly [Link]

    * Video on ZX-TEAM Meeting 2015 ... Mar 2015

    Stormfinch (Horizontal shoot-em-up, multicolour, nirvana ...
    Timmy Timmy June 2015 Games
  • Buddy 0.1 demo[url="http://wischner.co.uk/downloads/app.tap"]The tape is here[/url]. Load it, then enable kempston mouse emulation, then reload it. [url="https://g…

    ... filled circle) by using multiple horizontal lines (changing the line pattern ... may not start copy to video memory operation at scan line ...
    tstih tstih August 2015 Development
  • 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.
    horizontal signal. Then you should get ...
    1024MAK 1024MAK August 2015 Hardware
  • 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 ... someone unplugs/disconnects any other video source while the TV is ... /> In these CRT televisions, the horizontal and vertical sync systems will ... critical controlled by the input video signal, so a loss ...
    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 …

    ... to achieve higher than 160 horizontal pixels. At least with NTSC ... talking about old technology and video signals. :-D
    cbmeeks cbmeeks October 2015 Hardware
  • ZX Spectrum Sprite chipHi everyone. As I said some time ago, I wanted to make a 'virtual' Sprite chip for the ZX spectrum, on my ZEsarUX emulator. The idea is to make so…

    ... />
    I have uloaded another video demo:

    https://youtu ...

    Showing sprite zoom, horizontal and vertical mirror, and some ...
    chernandezba chernandezba November 2015 Emulators
  • No contended memory?Sorry if this is a stupid question. But I'm trying to learn more about the ZX Spectrum. If I had a stock 48k Speccy and I could wave a magic wa…

    ... microcontroller that drives the video. During the horizontal blanking, the CPU runs ...
    cbmeeks cbmeeks November 2015 Development
  • 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 ... regulators (or -converters) and in video encoder / ULA supply lines. ... yet.

    [i]Horizontal[/i] banding may be caused ... of series capacitor in composite video output. 47uF may work ...
    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 ... (or -converters) and in video encoder / ULA supply lines. ... code][quote="RetroTechie;843635"][i]Horizontal[/i] banding may be ... of series capacitor in composite video output. 47uF may work ...
    1024MAK 1024MAK 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…

    [quote="RetroTechie;843635"]
    [i]Horizontal[/i] banding may be caused ... of series capacitor in composite video output. 47uF may work but ... this also apply to s-video output?
    If not, what ... be the way to reduce horizontal banding in s-video?
    Renegade Renegade 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…

    ... quote="RetroTechie;843635"]
    [i]Horizontal[/i] banding may be caused ... of series capacitor in composite video output. 47uF may work but ... this also apply to s-video output?
    If not, ... the way to reduce horizontal banding in s-video?[/quote]
    Yes ...
    1024MAK 1024MAK 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…

    ... quote="RetroTechie;843635"]
    [i]Horizontal[/i] banding may be caused ... of series capacitor in composite video output. 47uF may work but ... this also apply to s-video output?
    If not, ... the way to reduce horizontal banding in s-video?[/quote]
    Yes ...
    Renegade Renegade December 2015 Hardware
<1…13141516171819…34>

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