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Author Topic: FPGA Replay Board  (Read 825026 times)

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Offline freqmax

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Re: FPGA Replay Board
« Reply #359 from previous page: July 09, 2013, 10:05:51 PM »
Quote from: bbond007;740412
I'm just going to cut my own out of an asbestos sheet and paint it with lead based paint.


Does it come with free 200 000 EUR free medical gift voucher? :D
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #360 on: July 13, 2013, 09:58:47 PM »
No he's been possesed by the Amiga curse.. :D
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #361 on: July 27, 2013, 02:25:11 PM »
Quote from: kamelito;742607
If I switch the FPGA Arcade then the TV I see a partial workbench screen (half black and half workbench vertically, the quality is bad) then 2s after the "No signal" message.


Any picture of this ..?

Regarding the Samsung UE40B6000 it seems to lack the PAL modes:
Modes daffichage (VGA et HDMI / DVI)
- 640 x 480 @ 60, 72, 75 Hz
- 800 x 600 @ 60, 72, 75 Hz
- 1024 x 768 @ 60, 70, 75 Hz
- 1152 x 864 @ 75 Hz
- 1280 x 720 @ 70 Hz
- 1280 x 1024 @ 60, 70, 75 Hz
- 1280 x 800 @ 60, 74 Hz
- 1280 x 960 @ 60 Hz
- 1360 x 768 @ 60 Hz
- 1440 x 900 @ 60, 75 Hz
- 1680 x 1050 @ 60 Hz
- 1920 x 1080 @ 60 Hz

Perhaps 720x576p @ 50Hz is missing:
https://engineering.purdue.edu/ece477/Webs/S12-Grp10/Datasheets/CEC_HDMI_Specification.pdf
"An HDMI Sink that accepts 50Hz video formats shall support the 640x480p @ 59.94/60Hz and 720x576p @ 50Hz video format timings." .. note that the supported formats doesn't include any 50 Hz ones.
Also listed under "6.3.1 Primary Video Format Timings".

Perhaps some code could be written that makes use of this:
"The DDC channel is used by an HDMI Source to determine the capabilities and characteristics of the Sink by reading the E-EDID data structure."

Ie if no 720x576p @ 50Hz format is available, then adapt some other..
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #362 on: July 27, 2013, 03:25:58 PM »
How can he make use of DEVS: driver options when he can't even manouver the workbench at all?
I suspect som magic keys or configuration file is the way to go.

NostalgiaStation(tm) ;)
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #363 on: July 27, 2013, 05:19:09 PM »
Quote from: ChaosLord;742662
We just boot our Amigas into PAL mode with a little proggy called "Palboot".  Then our American Amiga is just like a Euro Amiga.  I have played thousands of PAL games on my NTSC Amigas since 1980s.


How were PAL compatibility with USA monitors in the 80/90's ?
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #364 on: July 28, 2013, 12:27:45 AM »
How does the problem to make the Amiga core to sync with the display look? what shortcuts has been taken?

And VGA isn't a standard timing for Amiga asfair?

@Everblue, I think I recall someone mentioning that certain inputs (esp VGA) won't support some resolutions that other inputs will.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #365 on: July 28, 2013, 02:50:37 PM »
International shipping ought to make it available anywhere?
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #366 on: August 09, 2013, 08:19:31 PM »
You run Chameleon64 on the FPGA Replay?
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #367 on: August 10, 2013, 04:06:08 PM »
@mikej, Got first hand lease or are you stuck in the moving circus in the town?
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #368 on: August 10, 2013, 06:49:28 PM »
America has the "component video" (YUV) via RCA plugs instead of SCART asfaik.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #369 on: August 12, 2013, 02:08:55 AM »
I think I recall some SDHC timing issues with FPGA Replay.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #370 on: August 13, 2013, 02:53:33 PM »
USB-SCSI dongle and you are set ;)
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #371 on: August 14, 2013, 01:26:27 AM »
Quote from: mikej;744584
Wolfgang has some pictures of Phoenix here ...
http://pin4.at/pro_arcade_phoenix.php


How come his 8085 design uses so much FPGA resources?
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #372 on: August 14, 2013, 04:31:30 AM »
Gah.. missed that. Seems mystery is solved.

The Amiga in FPGA poses a somewhat similar problem when used with S/P-DIF or HDMI-audio (digital sound). As the Amiga sampling frequency may vary significantly but the output will not. A constant difference in frequency of course add another frequency, then there's aliasing etc.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #373 on: August 15, 2013, 02:36:30 AM »
The HDMI mode that allow HDMI+audio uses a different line coding. So the existing HDMI encoder chip on the FPGA Arcade can't be configured to enable audio. And the FPGA is too slow to make it happen.

But some of Xilinx newer versions has faster I/O so if the next version drives the "DVI" output directly from the FPGA without any encoder chip. A pure mechanical DVI-2-HDMI adapter and a core update is all that is needed to make use of HDMI audio.

As for HDCP, it has been "solved" for a few years.

So current incarnation can't fix this but newer Xilinx chips can solve the whole issue. And direct SATA connection can be done with the same I/O.

To stay within the licensing rules. There may not be any HDMI encoder chip and there may not even be a HDMI connector on the PCB. Not even pads for it (the last one asfair).
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #374 on: August 17, 2013, 01:24:36 AM »
For any serious Amiga implementation a XC3S1600E is more or less a minimum requirement. Or else one will be stuck with a slight incompatible 68000 without AGA/RTG.

Seems Pipistrello can handle HDMI directly with its Spartan-6 LX45 board for 150 USD. But the hackaday articlle hints that the picture is somewhat unstable?
Anyway it's the way past HDMI association ;)
(though the legality of a soldered HDMI connector is cloudy at best)