Search found 604 matches

by IanB
Tue Sep 15, 2020 7:36 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

Well, i'm confident about the results of the tests! And, about the Denise adapter published in the github, it is tested and working? i didn't found any info about it here in the thread, only a mention about your idea to use a simple direct shifter for the Amiga.. it's a very interesting solution an...
by IanB
Tue Sep 15, 2020 1:31 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

IanB, sorry for quoting again, but looking for the "new 12 bit PCB" in your Dev branch, and realized that perhaps you was referring to the 12bit extender.. it can be used with the 6 bit RGBtoHDMI board? No, You will need both the 12 bit main board and the 12 bit extender but I'm waiting for some pr...
by IanB
Mon Sep 14, 2020 6:37 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 33
Views: 1413

Re: For sale: RGBtoHDMI boards

I've added some kit assembly instructions to the wiki:

https://github.com/hoglet67/RGBtoHDMI/w ... mbly-Notes
by IanB
Sun Sep 13, 2020 8:34 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 33
Views: 1413

Re: For sale: RGBtoHDMI boards

I'll be sending out the boards over the next couple of weeks in batches, kits first as I have to finish building the others.
I'll PM you when your boards are ready to go.
by IanB
Tue Sep 08, 2020 9:16 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

1024MAK wrote:
Tue Sep 08, 2020 7:40 pm
For details see this document.
The analog output out of the TT chip wouldn't work at the moment although I intend to investigate an alternative analog board design sometime that would work with Atari/Amiga and maybe Archimedes just by plugging into the external video connector.
by IanB
Tue Sep 08, 2020 7:30 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 33
Views: 1413

Re: For sale: RGBtoHDMI boards

All boards are sold out now but please post if you want to reserve boards from the next batch
by IanB
Tue Sep 08, 2020 7:27 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 33
Views: 1413

Re: For sale: RGBtoHDMI boards

So the shifter in the STe and Mega STe has four output lines/bits per RGB colour (12 bits total) and therefore if RGBtoHDMI can cope with 12 bits of data it should be possible. I've continued this technical discussion in the main thread https://stardot.org.uk/forums/viewtopic.php?f=3&t=14430&p=2874...
by IanB
Tue Sep 08, 2020 7:25 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

From the for sale thread: On that basis, it should work with the following models, as they all have the same shifter chip: Atari ST (original range with external PSU and no internal disk drive), Atari STF - built in PSU and built in disk drive, Atari STFM - built in PSU and built in disk drive, the ...
by IanB
Tue Sep 08, 2020 7:10 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

aotta wrote:
Tue Sep 08, 2020 2:16 pm
Yes, the geometry was corrected, here the settings and new samples:
Aquarius.txt
Tea1002.bin.txt (added .txt suffix for attaching here)
Thanks for that, the supported list keeps growing!
by IanB
Tue Sep 08, 2020 1:50 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 33
Views: 1413

Re: For sale: RGBtoHDMI boards

Are the boards you are selling in this topic suitable? Not really, you can make it work with track cuts and links but there will have to be a new 12 bit board to do it properly. Heck, these are darned useful anyway, so please add another GRBtoHDMI kit to my order anyway. And if different boards are...
by IanB
Tue Sep 08, 2020 1:15 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

and... i found it was only due to a bad soldering in a Cpld's pin! Glad you got it sorted out Now colours are aligned to TEA1002 datasheet values, i have to do some tuning to the geometry, i think, but we can confirm RGBtoHD works fine with TEA1002 based computers too (Aquarius, Videopac G7400, Ace...
by IanB
Tue Sep 08, 2020 1:10 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

Thank you Ian for the info, but are they right for the 6bit board too? i'm playing with palettes with one of my old RGBtoHD (i keep the new ones with analog and YUV firmware), but it seems the words are in 0xRRGGBBMM format... I get first 7 colors right (i can't get a nice white for color no.8, ver...
by IanB
Sun Sep 06, 2020 11:33 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

I don't find any palette folder in the release's files... nor a palette table to copy from: where can i look for them? The palette folder is created on the SD card at first bootup of a fresh install and contains all the palettes And great news the new hw supported.. will you be able to update the "...
by IanB
Sun Sep 06, 2020 11:17 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

I've added support for 8 and 16 bit Atari computers: 1. Atari 800XL In cooperation with c0pperdragon there is now support for the Atari 800XL: capture6.png This requires a similar board to the C64 so is not a simple upgrade. Unfortunately there isn't a ready made solution for this computer although ...
by IanB
Sun Sep 06, 2020 11:06 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

I tested different palette and tintes, but with no results. In schematics, i noticed the TEA use a "invert" signals in addition to RGB ones, may be i need it too? how can i use it? You will need to create a custom palette table in the palettes folder so first you need to make a table of which digit...
by IanB
Thu Sep 03, 2020 6:49 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 33
Views: 1413

Re: For sale: RGBtoHDMI boards

1024MAK wrote:
Thu Sep 03, 2020 5:36 pm
1 x Add-on Analog board (are these available as kits as well with just the SMD parts already fitted?)
I wasn't going to bother with a kit for that as there isn't much soldering to do but as you've asked I've added a kit price as well.
by IanB
Thu Sep 03, 2020 5:37 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

I've started a thread in for sale for RGBtoHDMI and analog boards

I included a list of users that previously expressed an interest in a built up board so can those users confirm if they are still interested by posting in that thread:

viewtopic.php?f=8&t=20404
by IanB
Thu Sep 03, 2020 5:36 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

There are lots of frontends: analog 6/8 bit, TTL buffer boards 3/6/8 bit and PC EGA/CGA/MDA buffer The machine isn't a PC, so the PC buffer board is out. Example: one of the machines is a Tiki 100: https://en.wikipedia.org/wiki/Tiki_100 which has both analog and digital RGB output connects. Looking...
by IanB
Thu Sep 03, 2020 5:22 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

Is there any information inside the PNG file which distinguishes between mode 7 and other modes (which I could grep to set the aspect ratio accordingly)? I'll look at adding some way of explicitly distinguishing non-square screencaps but one option would be to read the screencap X and Y dimensions ...
by IanB
Thu Sep 03, 2020 5:12 pm
Forum: for sale / freebies
Topic: For sale: RGBtoHDMI boards
Replies: 33
Views: 1413

For sale: RGBtoHDMI boards

I have a number of 8 bit RGB to HDMI 'hats' and add-on analog boards for sale both as partially built kits and fully assembled: RGBtoHDMI Kit: Sold out (All surface mount components are already fitted, only through hole parts have to be soldered) Built: Sold out (Including cable) Add-on Analog board...
by IanB
Tue Aug 18, 2020 5:43 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

Nice work with the SC3000 & TI99/4a.
by IanB
Thu Aug 06, 2020 7:35 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

aotta wrote:
Thu Aug 06, 2020 12:02 pm
but tested the same yuv to RGBtoHD cable with a Spectravideo SVI-328 and... it worked fine!
Well done! Another one to add to the supported list.
by IanB
Tue Aug 04, 2020 2:24 am
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

I've got 12 bit capture into a 16 bit frame buffer working and that means: Commodore Amiga! capture22.png capture21.png capture23.png capture30.png capture24.png I'm picking up the 12 bit RGB data from inside the amiga so it's digital all the way and I've added interlaced video support so it should ...
by IanB
Wed Jul 22, 2020 8:16 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

aotta wrote:
Wed Jul 22, 2020 8:13 pm
May be c0pperdragon firmware 2.7 is different than 2.7 beta 2 Ian sent us? Which you used for blastering c0pperdragon?
The c0pperdragon 2.7 and the test version are identical
by IanB
Wed Jul 22, 2020 8:00 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

i've just installed my C0pperdragon and flashed new 2.7 firwmare (release, not beta2) from github. Can't still test the RGBtoHD becouse waiting for 4 tip jack for the cable, but i see no difference in the 288p mode with jtag pin 9&8 bridged or not... i expected strange and brighter colours... i mis...
by IanB
Wed Jul 22, 2020 6:44 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

I think what's happening here is that RGBtoHDMI is not detecting the video as mode 7 (i.e. interlaced) and is thus failing to engage the approriate capture code and deinterlacing. That's why the characters look ugly and jagged, very unlike what "mode 7" on the Beeb typically looks like. I think you...
by IanB
Mon Jul 20, 2020 10:30 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

Despite the occasional offset issue I get a rock solid picture for the first few minutes and then some sparkly pixels that get gradually worse the longer the system is left running. I am wondering if the heatsink I have on my VIC II is sufficient enough. I do plan to get another later revision VICI...
by IanB
Mon Jul 20, 2020 8:46 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

Yup worked first time. I did notice it can start up with a wierd negative screen offset or some sparkly pixels but powering off the C64 and on again fixes this. Seems to be fine once it’s settled. I'm getting the occasional picture shift on power up as well which power cycling fixes. It's a problem...
by IanB
Mon Jul 20, 2020 6:03 pm
Forum: 8-bit acorn hardware
Topic: Watford Electronics PALPROM Redesign
Replies: 13
Views: 1362

Re: Watford Electronics PALPROM Redesign

was the jed file tested? i used your files for Quest paint and it worked fine, but the wapping editor version stop my Master from booting. I don't know if i missed something or the Wapping Editor version is still in progress... It hasn't been tested so it will need to be looked at when I have the t...
by IanB
Mon Jul 20, 2020 5:22 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1223
Views: 92893

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

anightin wrote:
Mon Jul 20, 2020 12:02 am
And finally the RGBtoHDMI adapter after a bit of palette juggling thanks to the excellent instructions from Ian:
What a fantastically crisp display :D
That was quick, well done!

Go to advanced search