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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…
[QUOTE=rga24;766667]Dot crawl is caused by the compromises ... once they have been combined. Dot crawl is particularly bad on the ... does not do anything about dot crawl.
[/QUOTE]
Thanks ... -
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…
What about TC2048 and/or TC2068?
Do these computers show the same dot-crawl effect as the Spectrum? -
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…
... is much less cross luma (dot crawl) in the picture. -
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 back of it, its dot crawl problems have got much worse ... . The relationship between the dot clock and the colour clock ... no working Divide interface, the dot patterns looked more static, more ... or another machine with synchronous dot and colour clocks. I' ... -
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…
... by two to make the dot clock) and a 4.43MHz ... length - what we see as dot crawl.
I have modified ... problem altogether and has no dot crawl. -
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…
... . So the colour interference patterns (dot crawl) on a Spectrum vary in ... -
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…
... and there would be no dot crawl. The colour pattern would have ... by two to produce the dot clock. If you increase ... 15625.08810572687 Hz and a dot clock of 7000039.471365639 ... cycles per line because its dot clock and colour clock ... to repeat the colour dot pattern. -
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…
... ) output of the Spectrum with dot crawl:
[IMG]http://gigant.chem ... -
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…
... crystal clear picture without the dot crawl is really enjoyable. :wink:
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…
... and manages to reduce the dot crawl to a minimum. However, you ...Composite video mod on +2 grey: same as 48k?Hello all, Sorry for the n00b question but I couldn't find an answer yet... I did a composite video mod for the 48k in the past. Now I got a 128k +…
... gives a stable picture, the dot crawl is still there, but I ...New Youtube Channel - ChinnyVisionIt's bugged me for a while that many of the channels on Youtube for old games only feature emulated footage, or if they do feature original hardware …
... nothing quite like Speccy PAL dot crawl for 48k games. Sadly can ...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…
... one did not have the dot-crawl issue? :)
[url]http ...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…
... /> It won't suffer from dot crawl, but it will have other ... a black and white alternating dot pattern it will be possible ...48k Spectrum "Jail Bars" Removal?Hi all Just curious I think I saw a post here about the bars that go down the screen on some 48k's I think he referred to them as "jail bars". Any…
... trimmers!
Its the dot crawl/dithering effect on solid blocks ...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…
... display is pretty good and dot crawl is not all that bad ...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…
[QUOTE=rga24;771509]You can adjust the ULA clock frequency on an Issue one or Issue two Spectrum by adjusting TC1. On the others it is fixed; you would have to replace a capacitor.[/QUOTE]
But would that help in reducing the dot-crawl effect?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…
... that help in reducing the dot-crawl effect?[/QUOTE]
Not ... enough. There will be some dot-crawl so long as a composite ...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…
... 'm so used to the dot crawl and general picture ropiness that ...Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…
... suffer from a lot of dot crawl too which seems to draw ...A. Baldwin Dot Crawl SuppressorJust found this: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=1000622[/url] What the heck was that modification...? :p It sounds good, bu…
... the big problem with the dot crawl was down to not having ...A. Baldwin Dot Crawl SuppressorJust found this: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=1000622[/url] What the heck was that modification...? :p It sounds good, bu…
Dot crawl happens when the pixel clock ... are in phase and no dot crawl (or very little) happens ...A. Baldwin Dot Crawl SuppressorJust found this: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=1000622[/url] What the heck was that modification...? :p It sounds good, bu…
... /> [I]"Do colors slide, and crawl to the side?"[/I] (and ... the big problem with the dot crawl was down to not having ...Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... with not a lot of dot crawl. But I still cant get ...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 the ...Whites are yellow - 48k Issue 2I have a 48k issue 2 that appears to be working fine. I've replaced all but 2 of the electrolytic caps (mostly because the 2 were not in stock at my…
They're used to finely tune the two crystals on the board, they won't affect colour but finely tuning TC2 (I think) can help minimise the dot crawl effect. Of course, you have to have colour to see that :D
BBest 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 ...DVD title sequenceHello I'm not sure if this is the best place for this - but let's see how we go. I run a little DVD making company here in Cardiff, and we are …
... that suffers from blurring and dot-crawl.
It's also ...
