Project: HDMI/DVI out for STFM

Progress on our FPGA cores.
User avatar
Smonson
Trusted Guru
Trusted Guru
Posts: 562
Joined: Sat Oct 28, 2017 10:21 am
Location: Canberra, Australia
Contact:

Re: Project: HDMI/DVI out for STFM

Post by Smonson » Fri Aug 31, 2018 10:14 am

Yep, Quartus :D
I've only used Quartus-II (version 13) so I can't tell you whether any later versions will also work.

User avatar
exxos
Site Admin
Site Admin
Posts: 11679
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
YouTube: https://www.youtube.com/user/exxosuk
Contact:

Re: Project: HDMI/DVI out for STFM

Post by exxos » Fri Aug 31, 2018 10:26 am

Smonson wrote:
Fri Aug 31, 2018 10:14 am
Yep, Quartus :D
I've only used Quartus-II (version 13) so I can't tell you whether any later versions will also work.
I've got 17 & 13 installed :)
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
Smonson
Trusted Guru
Trusted Guru
Posts: 562
Joined: Sat Oct 28, 2017 10:21 am
Location: Canberra, Australia
Contact:

Re: Project: HDMI/DVI out for STFM

Post by Smonson » Fri Aug 31, 2018 10:44 am

If you load this file in (use JTAG mode), it'll attempt to display a diagnostic picture at 50Hz.

http://smonson.com/unmanaged/atari/hdmi ... -vsync.sof

Red screen with blue and white vertical bars: no vsync
Green screen possibly with one red horizontal bar: vsync

User avatar
exxos
Site Admin
Site Admin
Posts: 11679
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
YouTube: https://www.youtube.com/user/exxosuk
Contact:

Re: Project: HDMI/DVI out for STFM

Post by exxos » Fri Aug 31, 2018 10:48 am

Thanks.. will give it a try later, have to go out shortly :(
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
Smonson
Trusted Guru
Trusted Guru
Posts: 562
Joined: Sat Oct 28, 2017 10:21 am
Location: Canberra, Australia
Contact:

Re: Project: HDMI/DVI out for STFM

Post by Smonson » Fri Aug 31, 2018 10:54 am

No worries! I hope it's nothing serious, my track record so far isn't looking good otherwise :lol:

You can also read vsync off the following 3 pins arrowed in blue.
vsync-pins.png
vsync-pins.png (48.81 KiB) Viewed 1257 times

User avatar
exxos
Site Admin
Site Admin
Posts: 11679
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
YouTube: https://www.youtube.com/user/exxosuk
Contact:

Re: Project: HDMI/DVI out for STFM

Post by exxos » Fri Aug 31, 2018 11:27 am

Smonson wrote:
Fri Aug 31, 2018 10:54 am
No worries! I hope it's nothing serious, my track record so far isn't looking good otherwise :lol:
Welcome to the world of Atari :lol:
Smonson wrote:
Fri Aug 31, 2018 10:54 am
You can also read vsync off the following 3 pins arrowed in blue.
Cool.. will do that as well...
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
exxos
Site Admin
Site Admin
Posts: 11679
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
YouTube: https://www.youtube.com/user/exxosuk
Contact:

Re: Project: HDMI/DVI out for STFM

Post by exxos » Fri Aug 31, 2018 6:39 pm

IMG_3248.JPG
IMG_3248.JPG (381.01 KiB) Viewed 1231 times
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
exxos
Site Admin
Site Admin
Posts: 11679
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
YouTube: https://www.youtube.com/user/exxosuk
Contact:

Re: Project: HDMI/DVI out for STFM

Post by exxos » Fri Aug 31, 2018 7:03 pm

My first finding is noise somewhere... "finger on board" solves it...





Looks like U2 is a 16Mz buffer.. has really bad ringing on it.. with my finger on it, the image jumps to the left a couple of pixels and is stable.. without finger.. jumps to the right and has the odd horizontal noise lines shown in my video..

I suspect the buffer simply needs something like 100R on its input and output stop the ringing.. And would assume the picture would be rocksolid stable then...

Otherwise, seriously impressive stuff!
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.

troed
Moderator
Moderator
Posts: 680
Joined: Mon Aug 21, 2017 10:27 pm

Re: Project: HDMI/DVI out for STFM

Post by troed » Fri Aug 31, 2018 7:07 pm

Great!

And no spontaneous resets I guess?

(I don't have the finger-on-board need as far as I've seen. Haven't run medium res at all though I think)

User avatar
exxos
Site Admin
Site Admin
Posts: 11679
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
YouTube: https://www.youtube.com/user/exxosuk
Contact:

Re: Project: HDMI/DVI out for STFM

Post by exxos » Fri Aug 31, 2018 7:13 pm

troed wrote:
Fri Aug 31, 2018 7:07 pm
And no spontaneous resets I guess?
Not yet.. Not been running very long anyway..

Though if you're getting odd resets, it is likely noise on the 16Mhz line I assume...
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.

Post Reply

Return to “FPGA DEVELOPMENT”