Atom Video to HDMI Adapter

discussion of games, software, hardware & emulators relating to the Acorn Atom and Acorn System machines.
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anightin
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Re: Atom Video to HDMI Adapter

Post by anightin » Thu May 23, 2019 10:06 pm

Might give those a try thanks.

Just wrestling with a sick Plus 3 at the moment in a different thread -- now booting bare board, so if the drive works after re-connecting tomorrow I'll switch back to my ATOM project(s).

Andy

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oss003
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Re: Atom Video to HDMI Adapter

Post by oss003 » Fri May 24, 2019 6:07 am

IanB wrote:
Thu May 23, 2019 12:22 pm
anightin wrote:
Wed May 22, 2019 8:19 pm
Now to play frogger for a bit in colour
You have quite a few Atom palettes to choose from although the default one is the most practical, they are:

Atom MKI Card
Atom MKI Card Full
Atom MKII Card
Atom MKII Card Plus
Atom MKII Card Full
Atom 6847 Emulators
Hi Ian,

is it possible to do some 'Atom ULA magic' by defining your own palette?

Greetings
Kees
Last edited by oss003 on Fri May 24, 2019 6:07 am, edited 1 time in total.

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IanB
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Re: Atom Video to HDMI Adapter

Post by IanB » Fri May 24, 2019 1:48 pm

oss003 wrote:
Fri May 24, 2019 6:07 am
is it possible to do some 'Atom ULA magic' by defining your own palette?
In theory it should be possible but I haven't tried it yet. Even the special 16 colour mode might work although it would produce a rather chunky 64x192 resolution.

The in band command protocol still has to be finished as I got sidetracked working on the profile system.

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Re: Atom Video to HDMI Adapter

Post by -B- » Fri May 24, 2019 7:10 pm

I am making a sticker for my box. I've managed to label the buttons and LEDs based on the manual and trial and error but I'm not sure about the right-hand-side LED. Is it just an indication of power/operation?

Suggestions please...

BOXSTICKER.PNG

Neil.
Atom | BBC Model A | BBC Model B | Electron | Olivetti PC128S.

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hoglet
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Re: Atom Video to HDMI Adapter

Post by hoglet » Fri May 24, 2019 7:37 pm

-B- wrote:
Fri May 24, 2019 7:10 pm
Suggestions please...
The right LED is currently unused when the software is running on Atom Adapter.

It is driven by a GPIO on the Pi, so if anyone could think of a sensible use for it, we should be able to implement that.

Dave

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Re: Atom Video to HDMI Adapter

Post by -B- » Fri May 24, 2019 8:41 pm

That'll do. Now, which box is my photo printer in?

BOXSTICKER.PNG
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Re: Atom Video to HDMI Adapter

Post by -B- » Sat May 25, 2019 2:39 pm

Done. Quite pleased with it.
Once again, thanks Dave for an excellent design.

1F1B1C26-BE5B-4D56-9BC9-B50AE93A374C.jpeg
8F7B1E5C-891D-47EF-B146-B9DCD00E993D.jpeg
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trixster
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Re: Atom Video to HDMI Adapter

Post by trixster » Sat May 25, 2019 2:40 pm

That looks good
A3020 | A3000 | A420/1 | BBC B | Master Turbo | ZX48K | NeoGeo
Atom | Amiga A4000 | A3000 | A1200 | A500 | PC Engine | Enterprise
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Re: Atom Video to HDMI Adapter

Post by hoglet » Sat May 25, 2019 3:50 pm

-B- wrote:
Sat May 25, 2019 2:39 pm
Done. Quite pleased with it.
I'd love one of these.... Would you be willing to post a PDF?

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Re: Atom Video to HDMI Adapter

Post by -B- » Sat May 25, 2019 4:11 pm

hoglet wrote:
Sat May 25, 2019 3:50 pm
I'd love one of these.... Would you be willing to post a PDF?
No problem. PDF, Word file, Avantgarde TTF and Acorn Atom Colour logo files....

Video to HDMI Adapter sticker.zip
(1.16 MiB) Downloaded 18 times

Thanks to Steve Smith (projectspeccy.com) for the "Colour" logo.

Neil.
Atom | BBC Model A | BBC Model B | Electron | Olivetti PC128S.

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roland
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Re: Atom Video to HDMI Adapter

Post by roland » Sat May 25, 2019 9:49 pm

It really looks professional with this sticker. I hope you take this Atom with you to the TechSat in June.
FPGAtom: much better than Atom2k15 which was even better than the real thing.
MAN WOMAN :shock:

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Re: Atom Video to HDMI Adapter

Post by -B- » Sat May 25, 2019 10:00 pm

roland wrote:
Sat May 25, 2019 9:49 pm
I hope you take this Atom with you to the TechSat in June.
I will be, I still have lots of questions and a new issue has surfaced today but I will do some testing before I throw a question to the forum.

Neil.
Atom | BBC Model A | BBC Model B | Electron | Olivetti PC128S.

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wolfgang
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Re: Atom Video to HDMI Adapter

Post by wolfgang » Sun May 26, 2019 11:28 am

Dave's 8K video RAM/noise killer board built today and working great
Before:
1.jpg
After:
3.jpg
the board:
2.jpg
Thank you Dave for your great work! =D>
The HDMI board has to wait though, since I am a bit scared soldering the CPLD. :shock:

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Re: Atom Video to HDMI Adapter

Post by hoglet » Sun May 26, 2019 11:46 am

wolfgang wrote:
Sun May 26, 2019 11:28 am
The HDMI board has to wait though, since I am a bit scared soldering the CPLD. :shock:
What's going to make you less scared?

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Re: Atom Video to HDMI Adapter

Post by wolfgang » Sun May 26, 2019 12:12 pm

hoglet wrote:
Sun May 26, 2019 11:46 am
wolfgang wrote:
Sun May 26, 2019 11:28 am
The HDMI board has to wait though, since I am a bit scared soldering the CPLD. :shock:
What's going to make you less scared?
practice? :lol:
I might end up asking somebody else to do it, but I am not decided yet since I would like to do it myself. :wink:

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roland
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Re: Atom Video to HDMI Adapter

Post by roland » Sun May 26, 2019 3:32 pm

I know the feeling, I soldered about 18 pins together of the RAM chip on the 1MHZ FPGA adaptor :shock:
Before continuing with serious projects I ordered a few $1 kits from Ali to practise :lol:
FPGAtom: much better than Atom2k15 which was even better than the real thing.
MAN WOMAN :shock:

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Elminster
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Re: Atom Video to HDMI Adapter

Post by Elminster » Sun May 26, 2019 3:41 pm

wolfgang wrote:
Sun May 26, 2019 12:12 pm
hoglet wrote:
Sun May 26, 2019 11:46 am
wolfgang wrote:
Sun May 26, 2019 11:28 am
The HDMI board has to wait though, since I am a bit scared soldering the CPLD. :shock:
What's going to make you less scared?
practice? :lol:
I might end up asking somebody else to do it, but I am not decided yet since I would like to do it myself. :wink:
Well if you are coming to Cambridge you can watch me solder mine. Usually involves flux, desolder braid, swearing, crying, and then a stiff drink.

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Re: Atom Video to HDMI Adapter

Post by hoglet » Sun May 26, 2019 3:47 pm

roland wrote:
Sun May 26, 2019 3:32 pm
I know the feeling, I soldered about 18 pins together of the RAM chip on the 1MHZ FPGA adaptor :shock:
That sounds like:
- too much solder (I put about 3-5mm on the iron before dragging, and that enough for the whole side)
- not enough flux

It's not really a disaster though, it should all come off easily with solder braid (and more flux).

Dave

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Re: Atom Video to HDMI Adapter

Post by Elminster » Sun May 26, 2019 5:10 pm

I have some sticky flux and a drag solder tip to try at Cambridge . If they don’t work I shall go back to chisel tip and runny flux, like I used for beebscsi and freefi. I did try stencil and paste but found it harder than drag (that was a non acorn project).
Last edited by Elminster on Sun May 26, 2019 5:10 pm, edited 1 time in total.

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Re: Atom Video to HDMI Adapter

Post by etaoin » Mon May 27, 2019 5:18 pm

I see I'm listed as "no reply to PM". Sorry about that. I haven't got PM rights yet so didn't get a notification for the message and can't reply! I've send a message to the admins. If it's not sorted soon I'll post my e-mail address. I'm still interested!

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Re: Atom Video to HDMI Adapter

Post by hoglet » Mon May 27, 2019 5:30 pm

etaoin wrote:
Mon May 27, 2019 5:18 pm
I see I'm listed as "no reply to PM". Sorry about that. I haven't got PM rights yet so didn't get a notification for the message and can't reply! I've send a message to the admins. If it's not sorted soon I'll post my e-mail address. I'm still interested!
No worries, I've still got a few of both boards left. I'll PM you my email address.

Dave
Last edited by hoglet on Mon May 27, 2019 5:32 pm, edited 1 time in total.

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Re: Atom Video to HDMI Adapter

Post by etaoin » Tue May 28, 2019 6:03 pm

What is the slowest SRAM speed the noise killer will take? I have a 100ms 62256 in de spare ram box, plus a bunch of 120ms 6264.

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Re: Atom Video to HDMI Adapter

Post by hoglet » Tue May 28, 2019 6:59 pm

etaoin wrote:
Tue May 28, 2019 6:03 pm
What is the slowest SRAM speed the noise killer will take? I have a 100ms 62256 in de spare ram box, plus a bunch of 120ms 6264.
The components I've specified will allow the board to run at 4MHz, which is beyond what most Atom Users require.

It should be possible to use a slower RAM, but you will need to increase the the R1/C7 and R2/C8 timing components.

I would suggest starting by doubling the value of the R in each case.

A couple of questions...

Do you have access to a scope, so you can check the resulting pulse lengths?

What's the maximum speed you plan to have the Atom running at?

Dave
Last edited by hoglet on Tue May 28, 2019 6:59 pm, edited 1 time in total.

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Re: Atom Video to HDMI Adapter

Post by etaoin » Wed May 29, 2019 8:20 am

hoglet wrote:
Tue May 28, 2019 6:59 pm

Do you have access to a scope, so you can check the resulting pulse lengths?

What's the maximum speed you plan to have the Atom running at?
The Atom is bog standard at the moment (apart from an AtoMMC). Yes, I have a scope.

I'll just order a 55ns one anyway, they're far cheaper than what I paid for these 6264's many years ago...

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Re: Atom Video to HDMI Adapter

Post by -B- » Wed May 29, 2019 8:43 am

hoglet wrote:
Tue May 28, 2019 6:59 pm
The components I've specified will allow the board to run at 4MHz, which is beyond what most Atom Users require.

It should be possible to use a slower RAM, but you will need to increase the the R1/C7 and R2/C8 timing components.
I have used a Hitachi HM62256ALP-10 which I have plenty of in my stock (100ns?) and its working fine.
However, I will order a 55ns one though as I am fancying a faster Atom in the future.

Neil.
Atom | BBC Model A | BBC Model B | Electron | Olivetti PC128S.

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Re: Atom Video to HDMI Adapter

Post by hoglet » Wed May 29, 2019 9:28 am

-B- wrote:
Wed May 29, 2019 8:43 am
I have used a Hitachi HM62256ALP-10 which I have plenty of in my stock (100ns?) and its working fine.
However, I will order a 55ns one though as I am fancying a faster Atom in the future.
The minimum write pulse width on the HM62256ALP-10 is 60ns, and the timing component default values give a write pulse of ~75ns, so actually that should be fine as far as write are concerned.

Dave
Last edited by hoglet on Wed May 29, 2019 9:29 am, edited 2 times in total.

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Re: Atom Video to HDMI Adapter

Post by -B- » Thu May 30, 2019 12:34 pm

Just picked up an HP 1530 monitor with DVI input for €5.
It has speakers for when I get an AtomSID sorted out and I think I like the display better than my proper HDMI monitor as the backlight is more even and the screen is less reflective.

BA94699B-C4A8-4D10-A6FA-A38B2EB75B2E.jpeg
2F94B78F-069D-4323-B100-E66C91197641.jpeg

Neil
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Re: Atom Video to HDMI Adapter

Post by hoglet » Thu May 30, 2019 12:43 pm

Are you running it at the native 1024x768 resolution?

Dave
Last edited by hoglet on Thu May 30, 2019 12:43 pm, edited 1 time in total.

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Re: Atom Video to HDMI Adapter

Post by -B- » Thu May 30, 2019 12:53 pm

Yes, my HDMI was also at that resolution (it is actually a CCTV monitor with various inputs but I like that it is 4:3 aspect ratio).
Last edited by -B- on Thu May 30, 2019 1:08 pm, edited 1 time in total.
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Re: Atom Video to HDMI Adapter

Post by hoglet » Thu May 30, 2019 1:12 pm

-B- wrote:
Thu May 30, 2019 12:53 pm
Yes, my HDMI was also at that resolution (it is actually a CCTV monitor with various inputs but I like that it is 4:3 aspect ratio).
Did you add a new resolution file then? (for 1024x768@60Hz)?

We should include that as standard in the next release.

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