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1  Local / Trading und Spekulation / Re: btc-e Auszahlung on: December 05, 2013, 06:50:00 AM
Eine fast Off-Topic Frage: wie kann ich btcs in € konvertieren? Ich habe einem Kumpel ein bisschen geholfen, er meint, er will mir x0 btc schenken. Da mit btc kann ich wenig anfangen, brauche Papierwährung. Hier Anzeige aufgeben und irgendwo sich persönlich treffen, dann unter der Brücke mit Laptop die btcs Überweisen sowie Geld abholen? Irgendwie irgendwo online? Wie geht das?

Grüße
linlin
2  Alternate cryptocurrencies / Altcoin Discussion / Re: First GENUE LTC FPGA on: September 20, 2013, 05:48:37 AM
22 kh/s with 1,5$ for single kh/s makes 33$. Sorry, I don't buy that unless you get FPGAs from factory's back door. ~20$ costs 8 layer PCB in China, that you need to properly route all DDR3 signals from FPGA. Plus a device cost, plus assembly.
3  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] eMunie (EMU) - NOT a BitCoin fork/clone - call for beta testers on: June 21, 2013, 06:53:50 AM
Where is the mining algo? I need 1000$!
4  Economy / Services / Re: fpga design consultant for hire on: June 20, 2013, 01:22:23 PM
With everything, what is based on fpga.
5  Economy / Services / fpga design consultant for hire on: June 17, 2013, 08:59:25 PM
Offering my services:
Design with VHDL, Verilog and SystemVerilog.
Experience with Xilinx, Altera and Actel.
Verification, testing.
Board Layout with Altium Designer or Cadence Allegro.
Manufacturing of prototypes.
Located in Europe.
Payments over escrow.
6  Bitcoin / Hardware / Re: Raspberry Coins - Cyclone V - 28nm based FPGA miner on: June 11, 2013, 05:03:10 PM
NO! You are making big mistake. Scrypt runs 4096 iterations of salsa20_8 for calculation of ONE hash.
7  Bitcoin / Hardware / Re: Raspberry Coins - Cyclone V - 28nm based FPGA miner on: June 11, 2013, 11:15:09 AM
One can very accurately answer the question by looking in the ltc mining code. There is a nice long loop, what makes FPGA miners useless.
8  Bitcoin / Hardware / Re: Raspberry Coins - Cyclone V - 28nm based FPGA miner on: June 11, 2013, 09:05:37 AM
~15 W for 1 GH/s btc hashing.
9  Bitcoin / Hardware / Re: Raspberry Coins - Cyclone V - 28nm based FPGA miner on: June 11, 2013, 07:58:26 AM
By the way, why the price is so high? If you are building 300 boards and have inside connection at Altera, single FPGA would cost ~180$, raspberry pi is cheap, enclosure makes another 20$ from some cheap labor country. PCB+passives+power makes another 50$. So your profit is like 500$ from single unit :O Plus mining profits from testing the produced units couple weeks before delivery.  
10  Bitcoin / Hardware / Re: Raspberry Coins - Cyclone V - 28nm based FPGA miner on: June 11, 2013, 06:59:17 AM
Product dead on arrival. Who needs expensive fpga miner in the age of asics? Btw, nice job, cool design. I like the aesthetic side of this tiny rig.
11  Other / Beginners & Help / Re: What lies beyond ASICs? on: June 10, 2013, 04:50:54 PM
Or a huge rainbow table with all hash values in it. It should have capacity of 2^511 bits and some very fast search function.
12  Other / Beginners & Help / Re: What lies beyond ASICs? on: June 10, 2013, 04:46:23 PM
Printed on the window organic transistors powered by sun light. Not very powerful, but cheap to produce and no electricity is needed.
13  Local / Mining (Deutsch) / Re: FPGA Einsatz für ltc/btc mining on: January 10, 2013, 05:02:40 PM
Bitcoin:
hash = SHA256(SHA256(bigEndianToLittleEndianForEach32BitBlock(data)))

Litecoin:
hash = Scrypt(Scrypt(bigEndianToLittleEndianForEach32BitBlock(data),1024,1,1)1024,1,1)
Scrypt parameter sind N=1024, p=1, r=1.


Wie lang ist data?

Ergebnis von SHA256 und Scrypt ist doch 256 bits lang. Was passiert mit restlichen 256 bits beim zweiten Lauf von SHA256/Scrypt? Werden die mit Nullen ergänzt? Und von Links oder Rechts?
14  Local / Mining (Deutsch) / FPGA Einsatz für ltc/btc mining on: January 10, 2013, 04:39:24 PM
Hallo an alle,

ich bin auf der Suche nach know-how. Ich möchte einen FPGA Miner (zumindest im Simulator) für litecoins oder bitcoins entwickeln und habe schon einiges in VHDL geschrieben: HMAC-SHA256, rs232 für Kommunikation mit dem Rechner und salsa20/8. Daraus sollte scrypt entstehen, aber ich verstehe nicht so ganz wie alles zusammenspielt.

Was soll ich als Eingang für Mining auf der FPGA Seite nehmen? Wie lang (in bytes) ist diese Datei für Eingang? Ausgang ist immer 256 bit lang, was muss ich mit diesem neuen Wert machen? Mit irgendwelchen vordefiniertem Wert vergleichen um festzustellen, ob mein Ergebnis genug Nullen Vorne hat?

Bitte um Verzeihung, dass ich so doofe Fragen stelle. War meine Recherche richtig und es wirklich kein Buch über Mining gibt?

Danke und Grüße
linlin
15  Other / Beginners & Help / Re: Whitelist Requests (Want out of here?) on: January 09, 2013, 03:57:05 PM
Hello,

i would like to be white listed. Would like to ask specific technical questions about getwork protocol and litecoin mining hardware.

16  Other / Beginners & Help / fpga litecoin mining on: January 09, 2013, 03:36:09 PM
Hello all,

i would like to use fpga for litecoin mining.

There is already written vhdl code for rs232 communication, sha256 and salsa20/8 functions. They work very well in simulator at the moment. I don't have target hardware, I would like to simulate whole mining process and then start thinking about suitable devices.

I would like to ask, what is input and what is output for mining. I was not able to find any document about that. There are lots of discussions about midstates, hashes, blocks, targets, nonces, etc... How does it actually work. What do I need to transfer to fpga to start processing? What is the end result of that, that earns my pieces of cryptocurrency?

Thank you,
linlin
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