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Dot crawl?Hi, As I'm rather new to the hardware of the spectrum, just to confirm: is this video showing "Dot crawl" ? [url]https://www.youtube.com/watch?v=_U…
... , just to confirm: is this video showing "Dot crawl" ? [url]https://www.youtube ... of my Speccy + with composite video.
I've read ... -
Dot CrawlHiya, I know this might seem like a stupid question but i`ve seen the term "dot crawl" used a lot on articles about older Spectrums. I wondered if so…
Hiya, I know this might seem like a stupid question but i`ve seen the term "dot crawl" used a lot on articles about older Spectrums. I wondered if someone could explain what it is exactly and how it effects the graphic display. -
Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…
S-video eliminates dot crawl. Dot crawl is caused by the compromises inherent in composite video - ... been combined. Dot crawl is particularly bad on the 48K Spectrum because there ... mod simply provides standard 48K composite video at the correct brightness ... -
ZX Spectrum+ video ? red on green problemThis is my first post on the forum, so let me introduce myself. I am retired for several years. For 30 years I have been a fan of the ZX Spectrum. I …
... seeing here is standard 48k 'dot crawl'. It's caused by ... serious drawback of the Spectrum 48K electronic system.
[I]?S-video eliminates dot crawl. Dot crawl is caused by the ... combined. Dot crawl is particularly bad on the 48K Spectrum because ... -
Composit output on +2 and +3?I recently got hold of a dvd recorder for the purpose of recording speccy gameplay. It turns out that this particular recorder is not compatible wit…
... the composite video is generated is entirely different between the 48k and ... issues, for example the 48k suffers from "dot crawl" which doesn't occur ... -
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…
... note: most of the various video modifications shown in this thread ... protection against shorting of the video outputs.
So if ... lot of distorsion of the video output. Dot crawl is gone of course ... -
SPECTRA - RGB SCART Interface for 48K SpectrumSince the launch of the SPECTRA interface back in June 2012, some discussion of it has appeared in the forums in the past (mainly [URL="http://www.wo…
... -purpose interface for the 16K/48K ZX Spectrum, with the primary ... sharp, bright and free from dot-crawl, and equivalent in quality to ... written to the Spectrum?s video RAM, with the active display ... -
Childhood moments with my SpeccyHey everyone. The other day I randomly came across a tumblr page called "Me and My ZX Spectrum" ([url]http://meandmyzxspectrum.tumblr.com[/url]) …
... even prefer using a composite video cable instead of the RGB ... the RF output and the video artifacts and impurities introduced by ... young mind. I thought the dot crawl on the Atic Atac loading ... a shiny new ZX Spectrum 48K. We inspected it for minutes ... -
Issue 4S differencesI decided to buy an Issue 4S PCB after reading much about them on here. It was originally in a plus case which didn't come in the sale. I've been run…
... the video display at all. The display is pretty good and dot crawl ... is not all that bad for a 48K. If ... because the Spectrum video circuit already operates the video inverter transistor at ... work as a standard Spectrum 48K and reset when the NMI ... -
Some questions about the Timex TC2048/TC2068I have been doing some research about the specs of these 2 machines but I suppose it would be better to ask for advice in the forum since I have neve…
... the video output (CVBS) of these machines show the same dot-crawl like ... on the Spectrum 48K?
What ... -
emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…
... convincing ula interference but now dot crawl and ula snow - though ... smooth scorlling ? pixel sprites? interlaced video 384x256 with tv 90degrees to ... the end of an old 48K Spectrum ear/mic lead...< ... seperate small files and one 48K snapshot... I guess I would ... -
How to clean up video output to TFT LCD - Spectrum 48kHi, I hope that there is an easy answer to this question. I have modded the RF socket on my 48k Spectrum to output composite video as described in t…
... "design features" of the 48K Spectrum's video circuits that will leave ... to get rid of (like dot crawl). Also composite will never be ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... as seen from the composite video output of the ULA replacement ... present in composite video signals (i.e. dot crawl). The scanlines are ... clean picture, with nearly no dot crawl, or thick edges between ... very useful for a Spectrum 48K, but there are some ... -
Video output questions...Two questions... [QUOTE]1. The yellow and blue colours seem out of phase on the display. Is this normal for an RF connection to the TV/monitor?[/QUO…
... picture possible from a 16K/48K Spectrum and/or would prefer ... than possible using composite video. It eliminates dot crawl and ensures the main ... -
Video output questions...Two questions... [QUOTE]1. The yellow and blue colours seem out of phase on the display. Is this normal for an RF connection to the TV/monitor?[/QUO…
... composite signal (from a modified 48K) I switch to AV/ ... composite picture comes up fine, dot crawl and all.
... that amplifies the (composite) video signal used for synchronizing to ... TV with such superchip for video and synchron signal processing.< ... -
Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…
... - correct brightness, typical 48K composite full of dot crawl. No miracles here - composite ... is composite. The S-video version ... modified the rest of the video circuit, turning the composite output ... -
Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…
... ;766667]Dot crawl is caused by the compromises inherent in composite video - the ... been combined. Dot crawl is particularly bad on the 48K Spectrum because there ... composite mod simply provides standard 48K composite video at the correct brightness ... -
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…
... your video and it is working! ;-)
No more dot crawl! :-D ... if would fit on a 48k but I wonder if it ... /> @rga24: Did you do a video about making this modificaction on ... -
Issue 4S differencesI decided to buy an Issue 4S PCB after reading much about them on here. It was originally in a plus case which didn't come in the sale. I've been run…
... video display at all. The display is pretty good and dot crawl ... is not all that bad for a 48K. If ... the Spectrum video circuit already operates the video inverter transistor ... With a single transistor composite video mod, no further changes ... -
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…
... but does not completely eliminate dot crawl. S-video can, I understand. But ... not so much with my 48k) and, if I found the ... 48k Spectrum display to be problematic ... -
I'm totally confused now, RGB, composite, SCART what?Hello everyone. I have a +2A coming from the UK and I am wondering how I'm going to connect it to a modern TV. The TV has inputs on the back that ar…
... staying with the crap composite video. And occasionally having the ... slightly better S-Video (one channel {conductor} ... for the luma video and a second channel for ... a s-video modded 48k spectrum benefits from eliminating dot crawl and since ... -
Some questions about the Timex TC2048/TC2068I have been doing some research about the specs of these 2 machines but I suppose it would be better to ask for advice in the forum since I have neve…
... the video output (CVBS) of these machines show the same dot-crawl like ... on the Spectrum 48K?
[/quote]
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…
... to get rid of the dot crawl on my ZX Spectrum :-).[/quote ... listen carefully to rga's video on this matter and ... the s-video mod on both a 48K+ plus and 48K.
... .
On the rubber 48k there is no such space ... will lead you to dot-crawl free picture. :)TV for ZX SpectrumPlease select your TV type
... old CRT monitor.
48K machines I have them linked ... TV via s-video because I can't stand dot crawl anymore. Plus ...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…
... even CVBS (no more dot crawl, better control over color ... bit on the video circuitry of the 48K you'll soon ... realise that s-video is ... is changed into composite video and in turn into RF ... /> I quite like S-video output and on some ' ...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…
... even CVBS (no more dot crawl, better control over color ... bit on the video circuitry of the 48K you'll soon ... realise that s-video is ... is changed into composite video and in turn into RF ... /> I quite like S-video output and on some ' ...Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... a "perfect" picture quality. My 48k has a simple wire composite ... (plus naturally has lots of dot crawl) but it's nice to ... you want to perform the video mod "the more complex way ...Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... a "perfect" picture quality. My 48k has a simple wire composite ... (plus naturally has lots of dot crawl) but it's nice to ... you want to perform the video mod "the more complex way ... the machines in pieces?". The 48K definitely needs the mod as ...Video: Composite video mod on the ZX SpectrumThe video actually ended up being mostly about digging deep into into the image generation of the ZX Spectrum. Eventually I make the composite video …
... know that CVBS (and S-video) signal undergo an enhancement ... striking differences between cvbs/s-video and RGB one would ... real quality of cvbs/s-video signals coming from different ... than 48K CVBS signal because of the different chips, no dot-crawl, etc ...Spectrum 48K video fixI have done this mod to my 48k speccy and now when i plug the spectrum into the tvs composite port i just get a black and white picture no colour. It…
I have done this mod to my 48k speccy and now when i plug the spectrum into the tvs composite port i just get a black and white picture no colour.
Its an issue 3 board with rubber keys.
