It does make things easier with a UART port, maybe with a USB to TTL converter instead of a MAX232, however we'd now need to add an SPI flash to load the bitstream initially. I was thinking more of a custom Jtag to USB solution using FTDI chips for eg.
Topic: Custom FPGA Board for Sale! - page 17. (Read 91608 times)
ngzhang-- thank you for the advice! I have a feeling that you might be instrumental as we develop the next round of these boards. We always have a lower $/Mhash target in mind. My brain is fried for now, but we will certainly be talking to you later
Well can you hook us up with an insider price? 
Maybe you could help us design an on-board alternative?
Man I love the global connections of bitcoin
Remember, GPU mining may or may not be profitable 2 months from now. An FPGA miner should be profitable for years to come
Maybe you could help us design an on-board alternative?Man I love the global connections of bitcoin
Remember, GPU mining may or may not be profitable 2 months from now. An FPGA miner should be profitable for years to come
The on board jtag cable's SCH is public. Xilinx open source of it in SP605 Development Board
follow this link:
http://www.xilinx.com/support/documentation/boards_and_kits/xtp067_sp605_schematics.pdf
on page 32.
But what I want to say is: would you like to implement a more universe interface for the FPGA? For example, an UART port. This protocol is very easy to achieve in FPGA logic, and easy to use. It's only needs a MAX232 chip for voltage level translator.
Have A Nice Day
Well can you hook us up with an insider price? Maybe you could help us design an on-board alternative?
Man I love the global connections of bitcoin
Remember, GPU mining may or may not be profitable 2 months from now. An FPGA miner should be profitable for years to come
Maybe you could help us design an on-board alternative?Man I love the global connections of bitcoin
Remember, GPU mining may or may not be profitable 2 months from now. An FPGA miner should be profitable for years to come
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it seems all xilinx platform cables I can find on ebay.de (german site) are shipped from hongkong... maybe you could even get one for me and include it to save a little on shipping? I'd have to shell out $57 incl. shipping to get one myself.
Here's where we stand... if you buy a Platform cable on eBay, it will take 2 weeks to ship to you. We could buy it for you, but then we just have to ship it twice and there's no cost/time savings.
We are working on a design now to eliminate the Platform cable. If that ever comes to fruition, it will lower the board cost quite a bit. Also, with future bulk orders, price will go down more.
So, we need to cover our costs now. We want to get some boards out in the community for evaluation. At the same time, we don't want to screw our first buyers by charging a ridiculous amount, then undercutting that price by $50 or so in a month's time.
Here's the best solution I can come up with, molecular-- $440+shipping for the board. Buy your own Platform cable on eBay (it is a knockoff, but we use them- they work). If you ever decide to buy from us again, you get 10% off. This offer stands for our first 4 buyers.
Essentially, you trade a high cost right now for a much better bargain in the future. What do you think?
Here's a link to the absolute cheapest Platform cable- http://cgi.ebay.com/Xilinx-FPGA-CPLD-USB-download-Cable-JTAG-programmer-new-/250831239457?pt=LH_DefaultDomain_0&hash=item3a66b4f921#ht_2447wt_993
OMG.....
When I followed your link to eBay, then I do a search on it using key words:"Xilinx FPGA USB Cable".
I found there more than half of them are designed and produced by me, at least they use my product pictures for advertisement... I sell more then 2000 pcs of this staff in China, on TAOBAO.com, and some for middle man. In the past year....
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it seems all xilinx platform cables I can find on ebay.de (german site) are shipped from hongkong... maybe you could even get one for me and include it to save a little on shipping? I'd have to shell out $57 incl. shipping to get one myself.
Here's where we stand... if you buy a Platform cable on eBay, it will take 2 weeks to ship to you. We could buy it for you, but then we just have to ship it twice and there's no cost/time savings.
We are working on a design now to eliminate the Platform cable. If that ever comes to fruition, it will lower the board cost quite a bit. Also, with future bulk orders, price will go down more.
So, we need to cover our costs now. We want to get some boards out in the community for evaluation. At the same time, we don't want to screw our first buyers by charging a ridiculous amount, then undercutting that price by $50 or so in a month's time.
Here's the best solution I can come up with-- $440+shipping for the board. Buy your own Platform cable on eBay (it is a knockoff, but we use them- they work). If you ever decide to buy from us again, you get 10% off. This offer stands for our first 4 buyers.
Essentially, you trade a high cost right now for a much better bargain in the future. What do you think?
Here's a link to the absolute cheapest Platform cable- http://cgi.ebay.com/Xilinx-FPGA-CPLD-USB-download-Cable-JTAG-programmer-new-/250831239457?pt=LH_DefaultDomain_0&hash=item3a66b4f921#ht_2447wt_993
I have to admit I'm kind of jealous of you guys. 
But isn't the Board overengineered? Those voltage regulators look like they could drive at least a dozen spartan-6s. Out of curiosity how much LUTs do the 32bit rotations consume?
But isn't the Board overengineered? Those voltage regulators look like they could drive at least a dozen spartan-6s. Out of curiosity how much LUTs do the 32bit rotations consume?
Molecular: I can register the mail and then we'd be able to track it, I can't seem to find how much it'll cost to register everything, but I do know the base charges. Shouldn't cost more then USD$12 to get this packed and shipped to you registered.
ElectricMucus: wow what a nick, yeah it was over-engineered, I had no idea how much current the 1.2V rail will consume in the future, didn't want to re-roll or re-work everything if there is a limitation, going by the measurements I've carried out so far, that size (10A capable) is about right for VccINT, so I wouldn't say it'd be enough to power a dozen Spartan-6s, maybe another 1 at the current power consumption levels. The VccIO and VccAux rails require fair less current then I thought it would, a lower spec part is avail in the same footprint, I'll put it into the remaining production boards.
Overengineered- absolutely! Like I said, our priority was making sure it worked. I've had problems before with noisy or inadequate PSU's. These voltage regulators were chosen because they have especially low radiated EMI. On the version that we sell, we will downgrade them to a cheaper version, but with the same package.
I'll mention, too, that we will test everything before we ship it.
Molecular- we talked about including a Platform cable with the FPGA board. I think we should do this for you. Let me see what Li works out as far as shipping and stuff is concerned.
I'll mention, too, that we will test everything before we ship it.
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Out of curiosity how much LUTs do the 32bit rotations consume?
That's a question for fpgaminer, who is at work right now...Quote
I would really prefer bitcoin, it's just way cooler. Unfortunately I cannot find an escrow service. Clearcoin is closed. Maybe we could find a trusted community member? Paypal is an option however, if we cannot find someone.
Also: I would prefer some form of secured, tracked shipping, would hate to see this precious thing lost in shipping. I'm in germany. Can you give me a quote on shipping?
EDIT: it seems all xilinx platform cables I can find on ebay.de (german site) are shipped from hongkong... maybe you could even get one for me and include it to save a little on shipping? I'd have to shell out $57 incl. shipping to get one myself.
Also: I would prefer some form of secured, tracked shipping, would hate to see this precious thing lost in shipping. I'm in germany. Can you give me a quote on shipping?
EDIT: it seems all xilinx platform cables I can find on ebay.de (german site) are shipped from hongkong... maybe you could even get one for me and include it to save a little on shipping? I'd have to shell out $57 incl. shipping to get one myself.
Molecular- we talked about including a Platform cable with the FPGA board. I think we should do this for you. Let me see what Li works out as far as shipping and stuff is concerned.
I have to admit I'm kind of jealous of you guys.
But isn't the Board overengineered? Those voltage regulators look like they could drive at least a dozen spartan-6s. Out of curiosity how much LUTs do the 32bit rotations consume?
But isn't the Board overengineered? Those voltage regulators look like they could drive at least a dozen spartan-6s. Out of curiosity how much LUTs do the 32bit rotations consume?
Go ahead, we've got no reputation at this point of time, and we need to build the confidence. Alternatively we can use offer to use paypal or something. Whichever the buyer prefers.
I would really prefer bitcoin, it's just way cooler. Unfortunately I cannot find an escrow service. Clearcoin is closed. Maybe we could find a trusted community member? Paypal is an option however, if we cannot find someone.
Also: I would prefer some form of secured, tracked shipping, would hate to see this precious thing lost in shipping. I'm in germany. Can you give me a quote on shipping?
EDIT: it seems all xilinx platform cables I can find on ebay.de (german site) are shipped from hongkong... maybe you could even get one for me and include it to save a little on shipping? I'd have to shell out $57 incl. shipping to get one myself.
Go ahead, we've got no reputation at this point of time, and we need to build the confidence. Alternatively we can use offer to use paypal or something. Whichever the buyer prefers.
What do you think, Li? He's a senior member. Should we let our first buyer use an escrow service? I think we have enough dough to cover the first 1 or 2 out-of-pocket
Please message me, molecular, so we can work out payment addresses and escrow stuff
Please message me, molecular, so we can work out payment addresses and escrow stuff
Awesome! I'm almost buying it. Unfortunately you will not allow using an escrow service for my protection, because you need the money up front, right?
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Let me know about bulk orders too in terms of price, qty and shipping to LAX.
Shakaru- looks like shipping to the US will be $10 for one.
Jtag itself is fairly scalable, you can chain multiple devices into the loops I.E use the same Xilinx Platform cable to manage multiple boards with a modified harness.
I've yet to test this out properly though, so it'll take some time to implement (software side).
The cool thing about this minimalist design is that, with this as the base, we can add functionality later without having to ditch the entire board and dropping support. This avoids us having to re-spin the entire board, going through all the testing processes and then screwing the previous buyers over.
And yes, the bandwidth required is trivial.
I've yet to test this out properly though, so it'll take some time to implement (software side).
The cool thing about this minimalist design is that, with this as the base, we can add functionality later without having to ditch the entire board and dropping support. This avoids us having to re-spin the entire board, going through all the testing processes and then screwing the previous buyers over.
And yes, the bandwidth required is trivial.
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oh yeah, and a couple USB hubs. I'm assuming the amount of bandwidth these things take is trivial, right?
Yeah. I don't know exactly (not my part of the project), but Xilinx says you can run 127 from one computer.
question though, if it only uses 6.8W of power, why not give it a male molex connector + female usb connector so that you can stack these cards?
you should look into optimizing these so that you can build custom boxes to store rows of these without needing tons of molex connectors and usb ports
you should look into optimizing these so that you can build custom boxes to store rows of these without needing tons of molex connectors and usb ports
While stackable would indeed be nice, you can use splitters for the time being. Each rail on a regular computer power supply is 12v @ 5a, or about 60 watts. Even the cheapest power supplies have two rails with regular molex connectors for a total of 120 watts. If you load both rails to 80% (96 watts) you could put 7 boards on each rail, thus pulling 1.4 GH/s for less power draw than a single 5830. Of course right now that'd cost you $3,080 but who knows, given enough time price could very feasibly come down
Edit: oh yeah, and a couple USB hubs. I'm assuming the amount of bandwidth these things take is trivial, right?
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question though, if it only uses 6.8W of power, why not give it a male molex connector + female usb connector so that you can stack these cards?
you should look into optimizing these so that you can build custom boxes to store rows of these without needing tons of molex connectors and usb ports
you should look into optimizing these so that you can build custom boxes to store rows of these without needing tons of molex connectors and usb ports
This design is fairly modular already. Yes, you need multiple USB ports and Molex connectors, but those are cheap. We went for a simple solution first, to make sure it would work. Communicating over USB isn't trivial
Down the road... we have some changes in store, along those lines.
question though, if it only uses 6.8W of power, why not give it a male molex connector + female usb connector so that you can stack these cards?
you should look into optimizing these so that you can build custom boxes to store rows of these without needing tons of molex connectors and usb ports
you should look into optimizing these so that you can build custom boxes to store rows of these without needing tons of molex connectors and usb ports
It might take me a while to respond to a message because I can only reply to 10 msgs per hour. Sorry about that. We're only selling 1 to each customer at the moment, to help spread the word. If you want to buy all 4, go for it! We will certainly discount shipping and maybe we can work on another discount for you
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Give me a price. Let me know about bulk orders too in terms of price, qty and shipping to LAX.
It will take us at least a week to work out the details of the bulk order to come. Jump to: