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Author Topic: FPGA Replay Board  (Read 833585 times)

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Offline freqmax

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Re: FPGA Replay Board
« Reply #104 on: July 28, 2011, 01:41:13 PM »
If you can tell the microcontroller (ARM) what image to "boot" it's doable.

The open question is what machine/OS will be used as a platform for the menues, an Amiga might be overkill for the task. It will also require an interface from the computer side to interface with the microcontroller in a consistent manner without bootlenecks.

Block access might be convinient but may also make it possible to corrupt the entire fashmemory. An alternative is to limit access only to a single data block of configuration files.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #105 on: July 30, 2011, 05:37:50 PM »
@mikej, Still waiting for those pesky FPGA chips? ;)
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #106 on: August 02, 2011, 11:08:30 PM »
Where did you order the FPGA chips? (Digikey, Horizon, Avnet, Cedar)

Maybe it could pay to save upp enough money to buy 1000+ chips directly from the manufacurer. To get less lead times. And avoid further "shortages".
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #107 on: August 03, 2011, 12:16:35 AM »
Microsoft has the right to sue people for using the long filename feature (LFN). The FAT filesystem as such is free asfaik however (they lost the case). Except for ExFAT.

The rationale is to avoid any "standards" created by corporations.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #108 on: August 04, 2011, 02:17:57 PM »
Yeah it's complicated. Because you have to update two filename tables that must be valid simultainiously.

In the end, FAT is Fücked up. It's bad. But has infected virtually all computers on this planet.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #109 on: August 08, 2011, 11:09:44 AM »
Any pictures of the box, and it's interior ? ;)
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #110 on: August 08, 2011, 12:49:13 PM »
Just curious how 100 FPGA:s are packed ;)
(or 50?)
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #111 on: August 16, 2011, 03:09:40 PM »
Thecrow, Interesting!

@MikeJ, How many boards are taken out those 50 ?
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #112 on: August 30, 2011, 02:52:10 AM »
@psxphill, Use chip, connector, or pcb-layout-option that supports HDMI and the media-maffia sues you.
(not sure about the pcb-pad option route! thoe)

However an FPGA that supports the electrical interface of HDMI (Xilinx rocketport?) might be a way to deal with it. The hardware will be ok. And the producer isn't (hopefully) liable for what users do with it.

The problem with DisplayPort is the amount of video displays that supports it. Especially those fairly priced.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #113 on: August 30, 2011, 11:57:29 PM »
I hope China FL00DS the market with DisplayPort -> HDMI adapters. Intellectual property doesn't score high in that county I read. That is they have to catch the packets in the customs because IP-suing isn't going anywhere in that country.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #114 on: September 01, 2011, 12:56:24 AM »
MHL might be workable IF:
 * MHL to HDMI adapters are cheap enough (remember DVI is very straightforward!)
 * MHL is open and free
 * Chips implementing the TMDS interface can be bought in <100 qty for a fair price.

The alternative is to have an option board that turns DVI + S/P-dif or I2S etc.. into a combined HDMI signal. Ofcourse only the schematic, pcb layout, component list can be shared officially.


As for the 68060 additional board. I hope it will be fitted with a connector to make it possible to stack additional cards. Ie base fpga arcade + addon 68060 board + addon fpga booster + other..
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #115 on: September 02, 2011, 02:09:19 PM »
No S/P-dif output on the board !?
(or any other digital audio)
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #116 on: September 02, 2011, 10:35:10 PM »
Digital output is still desirable. But can I agree most TV speakers sucks big time.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #117 on: September 05, 2011, 01:40:14 AM »
S/P-dif is the right direction. But even that interface suck. HDMI at least has some error protection for its sound transport.

If the S/P-dif port packet data can be modified to use CRC or similar it would useful for external FPGA/CPLD based adapters.
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #118 on: September 06, 2011, 02:23:35 PM »
Proberbly better signal/noise ratio with a direct DVI to SCART cable ;)
 

Offline freqmax

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Re: FPGA Replay Board
« Reply #119 from previous page: September 07, 2011, 12:31:56 AM »
Quote from: wolfchild;658220
Good luck finding such a cable!  Failing that, you can't go very wrong buying one of my VGA to SCART cables ;)


Finding?.. Make! :P :D