Search found 697 matches

by IanB
Sun Feb 28, 2021 10:30 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 203
Views: 15499

Re: For sale: RGBtoHDMI boards

Sorry I've been unwell recently (not Covid!) and not been able to send anything out. I'll try to start again soon.
by IanB
Sat Feb 13, 2021 12:39 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

why are you dealing with internal machine signal instead the ones that being output via RGB connector? The extemely high quality results of RGBtoHDMI require an accurate digital representation of the video signal and it is difficult to reliably extract that from the multi level analog output of the...
by IanB
Tue Feb 09, 2021 10:40 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

Also, check out the overscan at 43:28. Do I just need to change the resolution setting to fix that? This isn't really fixable on a 1080p monitor without compromising something else. The profile is set up to capture an image with a vertical resolution of somewhere between 200 and 240 lines and with ...
by IanB
Tue Feb 09, 2021 10:28 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

I am interested on build one of these for use on my Atari ST and Amiga 500. What is the version that I need to build in order to connect the RGB output of these computers? I read something about a 12 bits capable version (4096 colors at once capable converter?)... For the Atari ST there is currentl...
by IanB
Tue Feb 09, 2021 10:09 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

Will this be something that will get to being a "finished" product in a little enclosure (apologies if that has happened already) as I'd really like to buy one at some point, or register interest to do so when that time arrives. Assembled boards are available in the for sale forum but you...
by IanB
Fri Feb 05, 2021 2:39 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

Wow, i didn't know it was in progress the support for FF-OSD!! i'll try the new release asap, Thank you! At the moment the support is only for c0pperdragon's internal Amiga board using an overlay input, see this thread for more details: https://github.com/c0pperdragon/Amiga-Digital-Video/issues/26 ...
by IanB
Thu Feb 04, 2021 2:34 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

There is a new software build here: https://github.com/hoglet67/RGBtoHDMI/releases This is a release candidate for the next stable version so please give it a test and let me know if you find any issues. This doesn't contain the CoCo 3 profiles updated by bluearcus as it was built before they were p...
by IanB
Sun Jan 24, 2021 2:29 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

I'm still having difficulty with artifact modes. Here's a link to a video showing how the artifact colouring seems to work and hold phase initially but the colour phase then breaks down. I managed to reproduce an effect similar to the video you posted and in my case it was caused by having the sync...
by IanB
Sat Jan 23, 2021 7:08 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

The source summary as requested: Can you drop the multiplier down to x6 or x8 at most as x12 is way overclocking the CPLD. See if that helps What software version are you running? Also how are you combining the H & V syncs? The sync type should be set to inverted if you are diode or-ing the H &...
by IanB
Thu Jan 21, 2021 10:47 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 203
Views: 15499

Re: For sale: RGBtoHDMI boards

is there a list or a queue of sorts and how do i sort payment. Yes, you're in it by posting here! I'll contact you by PM with details when I have some boards available. (You can set your options to be notified by email when you get a PM) also if i could pick your brain, can I leave the original vid...
by IanB
Thu Jan 21, 2021 10:13 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

The NTSC artifact mode seems to start OK, in terms of colours, but the LH border position is all noisily displaced, then it falls into this mode. This is all with my Custom built profile above. Vertical noise columns like that are indicative of the line length in the geometry menu being set incorre...
by IanB
Wed Jan 20, 2021 1:18 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

MajorMar wrote:
Tue Jan 19, 2021 3:47 am
It does! Out of the box. The only thing I had to change once I set the profile was the artifact rotation IIRC.
Can you post your saved profile with the correct settings and calibration and I'll put that in the next release.
by IanB
Tue Jan 19, 2021 2:49 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

MajorMar wrote:
Tue Jan 19, 2021 1:40 am
Indeed I was running beta 6. Here are some new screenshots from the latest version you linked to above.
Thanks for testing.
Those look much better, especially the shadow under the ship.

Does the new beta also work on the coco 3 ?
by IanB
Mon Jan 18, 2021 10:20 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

Here are the results of my tests on the Coco 3 with U7 installed. capture12.png That looks exactly as expected and matches up with your previously posted off screen photo of the CRT output: MVIMG_20201218_011436[1].jpg So the voltage levels are correct for NTSC at least. PAL has different levels ac...
by IanB
Mon Jan 18, 2021 1:10 am
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 203
Views: 15499

Re: For sale: RGBtoHDMI boards

sardine wrote:
Sun Jan 17, 2021 11:46 pm
and if you could point me in the direction for my Dragon 32 where what how please
looking to install internally and add a HDMI port
Details of Dragon connections and mods are on the Cables page:
https://github.com/hoglet67/RGBtoHDMI/wiki/Cables
by IanB
Sun Jan 17, 2021 6:35 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

How does that NTSC aspect ratio scaling work? It reduces the capture height from 256 to 200 and changes the pixel scaling from 2x4 to 2x5. You could have done it manually by changing those settings in the profile but the option automates the changes. It also works in the other direction so if you h...
by IanB
Sat Jan 16, 2021 10:54 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

A video update from Jan Beta with video capture working:

https://www.youtube.com/watch?v=9baCd5O2nG4
by IanB
Sat Jan 16, 2021 9:27 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

Anyway, I seem to be having some difficulty saving profiles - I'm getting an 'Error 4 saving file' message when attempting to save my tweaks into the U7 Tandy CoCo 3 profile. The menuing also shows Sub-Profile as 'Not found' which seems strange to me - should it not show the 50Hz PAL profile? I mis...
by IanB
Fri Jan 15, 2021 6:46 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 203
Views: 15499

Re: For sale: RGBtoHDMI boards

neufena wrote:
Fri Jan 15, 2021 4:31 pm
Do you have any non Amiga ones available? I'm unable to DM you.
Another batch is due soon
by IanB
Fri Jan 15, 2021 4:29 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 203
Views: 15499

Re: For sale: RGBtoHDMI boards

casper wrote:
Thu Jan 14, 2021 3:45 am
If available, would I be able to purchase 1xRGBtoHDMI board for use in an Amiga?
c0pperdragon is swamped with requests for Amiga boards so he has asked me to help out.
I have ordered some Amiga pcbs so will have them available in a couple of weeks.
by IanB
Sat Jan 09, 2021 1:41 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

IanB, I know you have been very busy, but did you give any more thought to an auto config that would work for setting RGB and screen position from a test card? It would be useful in certain circumstances, mainly with setting the analog sampling levels and maybe I'll look at it someday but it does m...
by IanB
Wed Jan 06, 2021 2:49 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

A small question - i have mine sitting on standoffs and not in a case - is it worth fitting a small heatsink to the pi cpu and the CPLD? I've not found any need for heatsinks even when it's enclosed in a case. You can check the pi zero core temperature in the system summary info menu. It's usually ...
by IanB
Mon Jan 04, 2021 6:58 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 203
Views: 15499

Re: For sale: RGBtoHDMI boards

z80micro wrote:
Sun Jan 03, 2021 8:13 pm
I am interested in using your RGBtoHDMI with RM kit that also uses 288p 50Hz PAL. Daniel reports success with the TTL version on RM kit and on his BBC.
Is your Research Machines computer also TTL output?
by IanB
Sat Jan 02, 2021 11:41 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

Yes. Using CGA artifacts and the correct phase I now have something that looks very similar to the output I was getting before on my Coco 1. There is a new beta test version with improved NTSC artifact colours for the Tandy CoCo 1/2 and Dragon. It now uses double the horizontal resolution and shoul...
by IanB
Fri Jan 01, 2021 7:25 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 203
Views: 15499

Re: For sale: RGBtoHDMI boards

Just a reminder that the NuLA is not compatible with the standard RGBtoHDMI converter as I can see the same users are posting in both threads. You will get an output when the NuLA is sending the normal 8 BBC colours but not when it is using custom colours. It will not work properly with the analog b...
by IanB
Fri Jan 01, 2021 7:15 pm
Forum: for sale / freebies
Topic: VideoNuLA boards
Replies: 204
Views: 35550

Re: VideoNuLA boards

Just a reminder that the NuLA is not compatible with the standard RGBtoHDMI converter as I can see the same users are posting in both threads. You will get an output when the NuLA is sending the normal 8 BBC colours but not when it is using custom colours. It will not work properly with the analog b...
by IanB
Thu Dec 31, 2020 12:56 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

I'm new to this but like to understand which boards I would need for my Model B and for a number of other computers i have: Spectrum 48k Sinclair Q L Atari St.& 800xl Amstrad PPC Will I be able to use the boards for these computers too? There are currently 3 ways to connect to the converter: 1....
by IanB
Mon Dec 28, 2020 12:12 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 203
Views: 15499

Re: For sale: RGBtoHDMI boards

Hi Ian, From a project planning perspective, is there any way to know where in the queue one is after placing an order? I assume that if no PM has been received one is quite low in the list? I’m only asking as I have various other projects to work on but this would jump to a high priority if I knew...
by IanB
Sun Dec 20, 2020 11:17 am
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 203
Views: 15499

Re: For sale: RGBtoHDMI boards

abestcom wrote:
Sun Dec 20, 2020 1:18 am
But still interested and I am from EU.
I've sent you a PM
by IanB
Sat Dec 19, 2020 1:58 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1408
Views: 130291

Re: RGB to HDMI using a Pi Zero and a small CPLD

Your suggestions did make some big improvements though. After changing the Lo values as you suggested, things are looking much better. Yes, that's the output I would expect. I think your A value was wrong, I guess it should be around 48. Using CGA artifacts and the correct phase I now have somethin...

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