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Author Topic: X6500 Custom FPGA Miner  (Read 208120 times)
ocminer
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January 20, 2013, 02:53:33 PM
 #1061

Anyone ever having a problem that one FPGA isnt detected anymore ?

With my rev2 FPGA0 runs fine and loads the bitstream with MPBM, but when it comes to detect FPGA1 it says "Bus 1 .... more than 99 devices on JTAG chain" ..

Huh

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nbtcminer
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January 20, 2013, 06:05:58 PM
 #1062

Anyone ever having a problem that one FPGA isnt detected anymore ?

With my rev2 FPGA0 runs fine and loads the bitstream with MPBM, but when it comes to detect FPGA1 it says "Bus 1 .... more than 99 devices on JTAG chain" ..

Huh

Sounds like something isn't right on the board. I would get in touch with Fizzisist and let him know; he's pretty awesome with support. BTW just a note; I would mine on a pool with stratum support. Works pretty good with X6500.
BR0KK
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January 20, 2013, 07:13:55 PM
 #1063

Maybe the bitstream is defect? On my Ztex boards there is a jumper to get them to default factory settings. Maybe you just need to reset the board.

One thing could be a faulty powersupply?

ocminer
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January 20, 2013, 08:17:36 PM
 #1064

On x6500 you need to load the bitstream everytime you power cycle the device, so it can't be the bitstream.

I already tested an other power supply..


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January 21, 2013, 03:42:36 PM
 #1065

@ocminer:

BTW how are your heatsinks attached to the FPGA chips? Are you using the stock setup with thermal tape or did you due thermal epoxy?

I would touch the heatsink of the non-working FPGA and see if its getting warm / more importantly check to see if it's loose.
ocminer
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January 24, 2013, 08:19:27 PM
 #1066

Hi !

I'm using the sock heat sinks.

The non working FPGA is getting warm, yes, the working one is really hot like it used to be, but the non functioning one is just getting hand warm.

It's not loose though..

It still has the error "More than 99 JTAG devices on chain... " wtf ?!

I had no reply from fizzisist for few days.. messaged him privately..

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January 24, 2013, 09:46:17 PM
 #1067

@ocminer:

I would give him a bit more time to get back to you. But in the meanwhile, I would identify the problematic FPGA and remove the stock heat sink. Check the chip to see if there are any bubble / deformities and if it is clear of them, clean the chip off with a small amount of rubbing alcohol. You can at this point replace the thermal tape on the heat sink (just make sure you clean the base of the heat sink thoroughly).

If the chip has bubbles / is warped / cracked, then you are likely out of luck. Best of luck to you and I hope its just some bad thermal tape.
fizzisist
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February 02, 2013, 06:06:49 PM
 #1068

Dear FPGA Mining customers,

Unfortunately, demand for FPGA miners has been too low in recent months to justify continuing to produce new X6500s. For the foreseeable future, FPGA Mining will be suspending operations. It's sad to step away from such an exciting and interesting project, but the time has come.

Thank you all for your interest and support! We'll still be involved in the Bitcoin world and hopefully find a new project to participate in soon!

Best regards,
fizzisist, fpgaminer, TheSeven, li_gangyi
FPGA Mining LLC

fizzisist
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February 02, 2013, 06:19:50 PM
 #1069

Hi !

I'm using the sock heat sinks.

The non working FPGA is getting warm, yes, the working one is really hot like it used to be, but the non functioning one is just getting hand warm.

It's not loose though..

It still has the error "More than 99 JTAG devices on chain... " wtf ?!

I had no reply from fizzisist for few days.. messaged him privately..

Hi ocminer,

Sorry for the delay in getting back to you. It's not clear what's going on with your FPGA to cause this. "More than 99 devices..." sounds like the TDO line is stuck high, so the computer is reading in 11111111... when detecting the number of devices in the JTAG chain. The first thing you need to check is whether power is present. If you have access to a voltage meter, you can probe the sides of the large electrolytic capacitors to check that the supply voltages for the FPGAs are being produced. It sounds like FPGA0 is working fine, so you should probe C58. This should read 1.2V (VCCINT for FPGA1). After checking that, we can think about other possibilities.

rocks
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February 03, 2013, 02:23:58 AM
 #1070

Dear FPGA Mining customers,

Unfortunately, demand for FPGA miners has been too low in recent months to justify continuing to produce new X6500s. For the foreseeable future, FPGA Mining will be suspending operations. It's sad to step away from such an exciting and interesting project, but the time has come.

Thank you all for your interest and support! We'll still be involved in the Bitcoin world and hopefully find a new project to participate in soon!

Best regards,
fizzisist, fpgaminer, TheSeven, li_gangyi
FPGA Mining LLC

Thanks for the x6500 guys, it's a great little FPGA board.
nbtcminer
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February 03, 2013, 02:28:58 AM
 #1071

Dear FPGA Mining customers,

Unfortunately, demand for FPGA miners has been too low in recent months to justify continuing to produce new X6500s. For the foreseeable future, FPGA Mining will be suspending operations. It's sad to step away from such an exciting and interesting project, but the time has come.

Thank you all for your interest and support! We'll still be involved in the Bitcoin world and hopefully find a new project to participate in soon!

Best regards,
fizzisist, fpgaminer, TheSeven, li_gangyi
FPGA Mining LLC

@Fizzisist:

Thank you for doing all that you have done for Bitcoin thus far and I look forward to your future projects!


Cheers,

nbtcminer
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February 03, 2013, 03:48:15 AM
 #1072

Fizz and the gang,
Good doing business with you over the past year...

Do you have any plans to explore alternative firmware for existing boards? 
Care to entertain bounties for MD5, SHA1, DES, etc cracking bitstreams?


I see the value of Bitcoin, so I don't worry about the price...
fpgaminer
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February 03, 2013, 04:09:58 AM
 #1073

I think I have SHA1 firmware laying around in one state or another. Been too busy to tinker with that sort of stuff.

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February 04, 2013, 01:28:33 AM
 #1074

Any chance you guys will get into the ASIC market?

freshzive
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February 21, 2013, 04:31:23 PM
 #1075

anyone selling these??

sirky
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February 21, 2013, 08:48:06 PM
 #1076

Dear FPGA Mining customers,

Unfortunately, demand for FPGA miners has been too low in recent months to justify continuing to produce new X6500s. For the foreseeable future, FPGA Mining will be suspending operations. It's sad to step away from such an exciting and interesting project, but the time has come.

Thank you all for your interest and support! We'll still be involved in the Bitcoin world and hopefully find a new project to participate in soon!

Best regards,
fizzisist, fpgaminer, TheSeven, li_gangyi
FPGA Mining LLC

It is a pleasure to use your miner. It has already more than paid for itself!
max in montreal
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February 21, 2013, 10:18:02 PM
 #1077

anyone selling these??

how many you need? i have 3 of them.
mjester93
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February 23, 2013, 06:48:48 PM
 #1078

anyone selling these??

how many you need? i have 3 of them.

Just curious: how much would you let one go for?
max in montreal
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February 23, 2013, 08:34:08 PM
 #1079

make me an offer.
EngMan
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February 23, 2013, 09:12:09 PM
 #1080

I've got quite a few...199USD in via PayPal shipped within continental USA only. (The used chips are worth approx 75 each, so my price is firm). If you have a home serving running....plug a few of these in to make a few bucks on the side. They use very little power.

Sorry, I'm all sold out of x6500's.
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