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Picture interference on red areas.I recently got a 48K Speccy off eBay, did a composite mode and it seemed to work OK, but then my TV had to go off for repair so I didn't use it for a…
I know this is probably a silly question, but i feel i should ask it.
Your not talking about Dot-crawl on red areas are you? -
Picture interference on red areas.I recently got a 48K Speccy off eBay, did a composite mode and it seemed to work OK, but then my TV had to go off for repair so I didn't use it for a…
... .
Your not talking about Dot-crawl on red areas are you ... -
Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…
... seeing on Speccy games was Dot crawl, and that *was* a design ... -
RGB to S-Video and Composite Adapterif I produced a dongle that generated composite and s-video from the RGB socket on +3 and Black +2 spectrums would anyone be interested? I'm thinkin…
... tight filters to prevent the dot crawl.
The good thing ... -
128 Heatsink Machine UpgradesThe title says it all - anything I can do to upgrade this machine? Thanks. I already have a PlusD and a DivIDE +..
... talk of. Do you mean dot crawl? (that's how I've ... -
Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
... has aided in eliminating artefacts / dot-crawl from the image -
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…
... sharp, bright and free from dot-crawl, and equivalent in quality to ... -
Composite video for 48k Capacitor orientationHello, My multisystem TV is acting up and I'm unable to navigate the menu to tune in the RF signal for my speccys. However the A/V input still works.…
... does not cure things like dot crawl etc that exist due to ... -
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 picture comes up fine, dot crawl and all.
But ... -
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…
Toastrack trouble[IMG]http://i44.tinypic.com/11lq7id.jpg[/IMG] Sorry about the picture size, cant figure out how to make it smaller! Anyway, the pic says it all, th…
Goody!!!
Don't you just love that pixel-perfect RGB out? After years and years of colour bleed and dot crawl, it's music for the eyes!
Nice Speccy you've got there, mate!Small MonitorShowing off my new toy which I think is pretty good seeing as I was getting very limited access to the TV and its too cold to go out to the man cave …
... quality on the Spectrum+. The dot crawl is down to caps needing ...a few questions1. When will emulators use pc vga capabilities to emulate the uhf tv output accurately including phosphoric delay and crosstalk synchronization 2. W…
... see realistic 80's TV dot crawl then why are they currently ...+2A/+3 composite modHi, Anyone has experience doing a composite output mod for +2A/+3? (yes.. I also have a working RGB) A while ago I did one based on the instruction…
... . The idea is to prevent dot crawl.
It's possible ... no effect to me, the dot crawl being just as bad with ...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…
... like feeling... not counting the dot crawl... :p
Now I ...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…
I tried this approach.
Overall picture was not much different but I did notice a slower dot crawl.
This was done on an issue 4A.+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…
... Spectrum has completely asynchronous dot and colour clocks so ... in the speed of the dot crawl.
(From ... same crystal source as the dot clock, the number of ... this causes the overall dot pattern to have a 2 ... This is why the dot pattern in a 128K ...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…
... the output from the speccy. Dot crawl is still present though.
Does your mod reduce dot crawl to a large extent vis ...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…
To fix dot crawl, buy a 128k/+2/+3 machine and use a RGB connection :D
Or for 16k and 48k machines, buy a SPECTRA RGB interface :D
[I][B]Mark[/B][/I]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=1024MAK;766669]To fix dot crawl, buy a 128k/+2/+3 ...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=1024MAK;766669]To fix dot crawl, buy a 128k/+2/+3 ... have some "control" over the dot-crawl effect (and even make it ...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?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…
... . 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:
