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Author Topic: FPGA Amiga's and Genlocks  (Read 3186 times)

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Offline trekiejTopic starter

FPGA Amiga's and Genlocks
« on: November 13, 2012, 06:12:25 PM »
Has anyone connected a Genlock to any of these?
Thanks.
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Offline freqmax

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Re: FPGA Amiga's and Genlocks
« Reply #1 on: November 13, 2012, 06:48:46 PM »
If you can feed the sync signal to one FPGA I/O pin and "recompile" a new core that makes use of DCM to scynchronise the 4x video clock, it should be doable.
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Offline Iggy

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Re: FPGA Amiga's and Genlocks
« Reply #2 on: November 14, 2012, 12:53:33 AM »
So that you could work with analog video that isn't widely used in the US (or abroad) anymore?
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Offline XDelusion

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Re: FPGA Amiga's and Genlocks
« Reply #3 on: November 14, 2012, 01:03:11 AM »
That was my concern...

Will SuperGen + and ChromaKey + be supported...
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Offline trekiejTopic starter

Re: FPGA Amiga's and Genlocks
« Reply #4 on: November 14, 2012, 05:49:10 PM »
Mainly curriosity, I feel digital is either expensive or lacking quality.
I guess you get what you pay for.
It would be nice to see how an external genlock would work if the mini-mig had an amiga rgb output to genlock with.

Basically I just do not know how to leave stuff alone.
B)
« Last Edit: November 14, 2012, 05:50:00 PM by trekiej »
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Offline trekiejTopic starter

Re: FPGA Amiga's and Genlocks
« Reply #5 on: November 14, 2012, 06:27:22 PM »
Another curriosity, how could an Aros machine with a vga signal make an rgb signal?
Has anyone ever used a parallel port to make an rgb signal?
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Offline JimS

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Re: FPGA Amiga's and Genlocks
« Reply #6 on: November 14, 2012, 07:35:35 PM »
Quote from: Iggy;714885
So that you could work with analog video that isn't widely used in the US (or abroad) anymore?


Since when do Amigans worry about using something that isn't widely used? We wouldn't use Amigas if we did. ;-)
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Offline psxphill

Re: FPGA Amiga's and Genlocks
« Reply #7 on: November 14, 2012, 07:46:36 PM »
Quote from: trekiej;714959
Another curriosity, how could an Aros machine with a vga signal make an rgb signal?
Has anyone ever used a parallel port to make an rgb signal?

A lot of VGA cards can be programmed to output 15khz. To connect to an amiga monitor you might need to combine the H & V signals into composite sync.
 
It's not practical to use a parallel port to output rgb. You could probably do something, but the resolution and colour would be very limited. Timing would be difficult as you'd need to generate the sync as well, it's the type of thing you would do on an AVR chip not on a PC
 
http://www.youtube.com/watch?v=sNCqrylNY-0
http://www.youtube.com/watch?v=yK2MMMTw3SY
« Last Edit: November 14, 2012, 07:51:01 PM by psxphill »
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Offline Tripitaka

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Re: FPGA Amiga's and Genlocks
« Reply #8 on: November 14, 2012, 10:48:41 PM »
Quote from: Iggy;714885
So that you could work with analog video that isn't widely used in the US (or abroad) anymore?


One good reason for that can be summed up in two words; Generation Loss.

Iggy is spot on. I see no good reasons to use analogue at all, digitize, manipulate, output, end, 'nuff said.
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Offline freqmax

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Re: FPGA Amiga's and Genlocks
« Reply #9 on: November 14, 2012, 10:56:03 PM »
DVI/HDMI/SDI input shouldn't be rocket science. Except perhaps a rocketport for Xilinx FPGA ;)
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Offline Iggy

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Re: FPGA Amiga's and Genlocks
« Reply #10 on: November 15, 2012, 03:45:42 AM »
Quote from: Tripitaka;714985
One good reason for that can be summed up in two words; Generation Loss.

Iggy is spot on. I see no good reasons to use analogue at all, digitize, manipulate, output, end, 'nuff said.

Thank you!.
At last, someone who isn't into pain.
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Offline Linde

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Re: FPGA Amiga's and Genlocks
« Reply #11 on: November 15, 2012, 11:20:51 AM »
Quote from: Tripitaka;714985
One good reason for that can be summed up in two words; Generation Loss.

Iggy is spot on. I see no good reasons to use analogue at all, digitize, manipulate, output, end, 'nuff said.

On Amiga forum; users dismissing the use of outdated technology over "good reasons".
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Offline bloodline

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Re: FPGA Amiga's and Genlocks
« Reply #12 on: November 15, 2012, 11:46:44 AM »
Quote from: Linde;715021
On Amiga forum; users dismissing the use of outdated technology over "good reasons".
I agree it does seem ironic... But this isn't really about "outdated technology", as much as it is about simply getting data out of the analogue domain and into the digital domain.

For the sake of efficiency and manipulation we need to get things into the digital domain as soon as possible :)
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Offline persia

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Re: FPGA Amiga's and Genlocks
« Reply #13 on: November 15, 2012, 03:23:27 PM »
576i (or 480i in North America) is less expensive and higher quality than 720p or 1080i?  In which universe do you live?

Quote from: trekiej;714954
Mainly curriosity, I feel digital is either expensive or lacking quality.
I guess you get what you pay for.
It would be nice to see how an external genlock would work if the mini-mig had an amiga rgb output to genlock with.

Basically I just do not know how to leave stuff alone.
B)
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Offline trekiejTopic starter

Re: FPGA Amiga's and Genlocks
« Reply #14 on: November 15, 2012, 04:41:08 PM »
It sounds like we need a digital/analog input on these FPGA machines.
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