Translation from Portuguese to English: Help to build a miner with Raspberry Pi Ultimate XBMC Am new to the forum and started mine a few days, well I read some websites on miners hardware, but it is very difficult to find a good and affordable in Brazil, so I tried to see more or less how to develop one. Reading I saw Need a Raspberry Pi Ultimate XBMC, some Asicminer Bloc Erupter (I think this and the correct name) and other things, my doubts and the software that goes on board memory, how to install it how to handle and how many of those usb's I I take to the mining per day will cover the amount invested in a few days. (No need to worry about light usage). para Debugest : Há um lugar que você pode conversar com as pessoas em: https://bitcointalk.org/index.php?board=29.0 |
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I don't know what your psychological disability is, so I can't help you.
"psychological disability" eh? if you think that's all it is when: SHA-256 is essentially a 16-position shift register that is 32-bit wide. The fancy hashing feedback is mostly 32-bit wide adders and some bit twiddling that in hardware can be implemented mostly with wires and very few gates.
..Explains bugger all, then go on to say: The information required to solve all the technical problems to implement hardware SHA-256 miner is all available here on this board. Multiple people did their own implementation using the sensible learning technology of the XXI century: FPGA development kit. It takes between a week or a month to do it from scratch, depending on the student's aptitude. Simple FPGA development kits cost less than $100, many schools can get them for free.
you really are not helping with me trying to understand how things work. For the problem you posed I think you misunderstood the description of Ki constants in the FIPS-180. FIPS describes how to derive them to show that those are "nothing-up-my-sleeve" numbers. Any hardware implementation will simply store those constants in ROM or other storage device.
4.2.2 SHA-224 and SHA-256 Constants
SHA-224 and SHA-256 use the same sequence of sixty-four constant 32-bit words K0{256},K1{256},...,K64{256}. These words represent the first thirty-two bits of the fractional parts of the cube roots of the first sixty-four prime numbers. In hex, these constant words are (from left to right)
so I said 8 prime numbers that is used to do 1st round to start the calculation going, by the NSA standard, stated in the spreadsheet. over the 64 prime numbers used to get the hex needed for each round. (now looking at this, i do question, these values never change yes? i could just set them into a rom?) if im so utterly wrong, tell me how and show me where im going wrong.. now you're talking about getting data into the calculator? fare enough, could cheat and use a fpga/micro to push data to the mess I'm planing to make. |
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The whole point is that rolled (not-unrolled) SHA-256 will require less gates than the serializer plus deserializer and the sequencers required to interface with anything less than 32-bit wide.
SHA-256 is essentially a 16-position shift register that is 32-bit wide. The fancy hashing feedback is mostly 32-bit wide adders and some bit twiddling that in hardware can be implemented mostly with wires and very few gates.
The above 32-bit circuit will be trivial to interface to the computer provided that the computer has a 32-bit bus like EISA or PCI-X.
With any narrower bus more gates will go into the required sequencing logic than into the actual hash computation.
Show me any USB chip that can put-out or latch-in 32 bits in parallel.
All this doesn't require decades of engineering experience. Even completely cursory understanding of the evolution of the PC-compatible computers is sufficient to understand that the wide ribbon cables and long edge connectors disappeared from the computers only very recently. In the TTL days of SSI/MSI chips all interfaces were parallel and as wide as people could afford.
im glad you know how these work, you could basically lay it out what logic is required to do what calculation.. "bit twiddling that in hardware can be implemented mostly with wires and very few gates." so 2 or 3 gates and wires will calculate square root, drop the whole numbers, shift up and then convert the decimal to hex, of first 8 prime numbers? if you say yes, show me a boolean logic layout. Really, if you going to come here to belittle us, bugger off. Simple. I want to know how these things work, I'm a visual learner, and hell, if it is possible to make them, why the hell not? common, GBG made a NES mine bitcoins.. why cant I make a handful of transistors do it? or even out of 7400 series ttl chips.. |
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Even doing this out of 74xx logic would be pretty sexy. I'd run one.
And how would you interface it with a computer with a network interface? I mean without using more TTL chips for the interface than for the computation core? same way when you interface with any other micro-controller, Serial baby! I gotta ask: 1. Did you start making the giant breadboard yet? B. Did you try the ram in a different PC / Laptop to prove it is OK? 3. I hope you do this and make that giant thing. You should do a charity auction afterwards. Or, put it all to mine to an address for a charity. I bet there are plenty of collectors, and normal people (like me)who would bid something on it as an art piece. 1: that about step 250.. B: yeah, swapped memory into another 2 generation core i3 system, did the same thing, popped it into a 1st gen core i7 system, ran with out a hiccup .. (also did the stick 1 to slot A/B, stick 2 to A/B, etc it looks like this memory controller doesn't like anything more then 4GB/slot) III: I bet it would be big, since a 16bit CPU done that way takes up so much room (for example). but the idea is for educational understanding. so selling/donating it, maybe see what happens. |
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Since you can calculate it by hand (pencil and paper linky link) So I've had the idea on making a bitcoin calculator from scratch, since ASIC companies make 100s or 1000s of the into their chips, I wanted to know what is required to make one. Basic idea was to slap some discrete logic together and have it calculate on the bitcoin network. home brew CPU style yo! The reason for this is to understand the hardware required to make a asic chip work, them maybe refine it, in the end, who knows, this may turn into another ASIC development. Hell, link me to some original posts asking the same thing, i cant seem to find anything.. or im blind.. |
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That said, sales have just about caught up to what we have in parts. If many more come in we'll have to fetch additional components to manufacture 'em. But that's a good problem to have, right?
Call it Batch 2 in the next few months? I'm sure there will be more going after them once the public shows off their new toys |
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well, linux + winxp + win 7 + win10 at work (need to know how to make things work for customers) the only thing I'm lacking is an OSX box.
but linux for most of my at home, then win7 for just games, cant be stuffed trying to get directx based games running on linux. I believe steam makes it easer, but meh.
also, the way its looking, win10 + bitcoin client = microsoft has your key and wallet on their servers, ready for any hackers to pop the lock on (sony networks anyone?). but that's paranoia about telemetry storing what your typing, saying and writing via stylus.. the joys of being the product microsoft is selling.
philipma1957, my favourite was win95 version C, and i grew on vista, it did games better then any of the others...
want a small usable OS side? ever tried TinyCore? basic OS with GUI, ~10MB, then you have the options of installing modules, bloating it your own way (eg, firefox and its 5x the OS size)
anyway, Pictures Baby! I need my weekly fix! >_o
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A photo or two on imgur works . Unless they are Google owned.
I try to use bing and yahoo when possible.
yeeesss, bing all the things! Microsoft wants to know alll about you! raise your hand if you're a poor sod who has win7/8/10.. look at all them sheeple .. if you'd excuse me, i have some grass to chew on.. |
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If not from Bitmain, maybe Canaan-Creative or InnoSilicon. Someone's gotta take care of the 99%, right?
You know, when I was asking about 1384 they asked me if I'd rather not buy a bunch of discounted U3 and take chips off them instead - until I reminded them that the U3 had 1382 on it and that wouldn't do me any good.
Well, you could buy 20 odd A3222's (the 25GH/s 0.4-0.6J/Gh things) off avalon themselves for 0.72btc. now, unless they are lying about having 9 stacks of 20 chips for sale at their store.. unless you're waiting for their new-bute hot out of the silicon oven chips (which i haven kept up with whats in r&d since the a3222 release earlier this year)? as for InnoSilicon, isn't the A1, A2 and the upcoming A3 all S-crypt? what is this "A1 CoinCraft"? am i missing something? little googling found out the Coincraft A1/A1 Booster is bitmines re-branded chip from innosilicon, but going by their site, A1 is a S-Crypt ASIC. so what is the A3 going to cover? |
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"Sorry to inform you that we don't have spare chip to sell. Please kindly consider the miners directly."
- Bitmain
"I do not want the miners Bitmain is currently offering for sale. I'm working on a design for a miner which meets needs your machines do not. One of the businesses I am working with is currently using S3 and S5 boards on C1 waterblocks for both residential and industrial heating applications and would like to continue using these installations with upgraded electronics, but your new S7 does not meet the mechanical specs (in addition to other system requirements) to be used. The board I am designing will do the job. I would like to use your BM1385 chips, as I had a fair amount of success working with the BM1384 chips I purchased earlier this year. Your chips are good and I was very glad to see the design improvements from the previous generation, both in efficiency and ease of interfacing. If I can't purchase sample chips from you, which will lead to a final design and likely mean factory batch orders of chips purchased from you in the next several months, well I'll have to buy someone else's chips instead.
Would Bitmain rather have me and the groups I'm working with as customers, or would they rather see us purchase from Bitmain's competitors?
I am right now designing around the BM1384 and intend to retool the final design when new chips are available (from Bitmain or someone else). Having chips in the near future would be nice, but I could wait about four weeks (when your S7 is supposed to start shipping) without causing any real delays. I would be willing to pay up to US$200 for fifty BM1385 shipped to my shop in the US. This is less than one S7 board worth of chips."
- me
"no no, buy our miners.. we want to see you screw up the chips by attempting to depopulate these $2k miners..." |
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If you want to build a waterblock setup for a $40 miner, sure. I'll be playing with some CPU coolers to see what the various clearance requirements are. Screwed down would be better than the crappy little snap-ons (I've never liked those). I'm still at the very beginning of the electricals and haven't really thought about starting on mechanicals so I'm not at all sure what's possible yet. I just know what I want to do.
And I don't really want to build a socketed chipboard.
Or one could build an appropriately dimensioned tank and dunk a buttload of'em in Novec 7100. mmm, sweet smell of methoxy-nonafluorobutane in the morning.. |
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Novak and I ironed out basic details for the control parts of a board today, and I got an initial buck design complete for a 4-chip pod miner. Parts should be inbound (hopefully here Monday) to get started prototyping the power and getting all the diggitals lined out. We've got enough BM1384 to build a few test boards to prove the design, which hopefully will be adapted directly for BM1385 and potentially mass-produced. It'd probably be just a bare board with riser feet, upon which you mount a standard CPU cooler and plug it in to power (6-24V) and USB. Looks like nominal chip dissipation of 40W with probably overclockability past 50W if you can keep the chips cool.
Hopefully there's no trouble getting temp sensors, fan speed and software voltage control integrated.
The digital controls integration is the last real hurdle in a full miner design. If we can get it working properly, the template from the pod miner would shift directly over to TypeZero boards, obviously with different power systems and a bunch more chips. I've got a bit of PSU board manufactoring to do in the next few days, but for the next month basically I'll be using all my time that isn't Compac manufacture and shipping for miner design. I may need to help Novak out on some projects after that (it's a fair trade, since he's doing all the driver code for my project right now) but for now miners are priority.
These BM138* can still move the thermal load though the PCB yes? or are they top sink dependant? also thinking you might need to get a 50mm/0.19" copper shim off the chipset for these sinks to clap onto properly, since they are designed to clamp down onto a socketed CPU. ooor you could design it to be a socketed ASIC carrier board for quick swap of the 84/85s, just have some resistor network to change data control/ power output! Yeah, need the bm1385s to work that out.. 50W load with a 75w i3 cooler (seensed one of them there sinks on a 90w i7)? Easy! $40 150W "Cooler Master TX3" on that thing, no problem. or any AMD sink.. my main concern is the stock cpu heatsink not holding down onto the chips properly. I'll have to find a dead board and a heatsink to match and see how much movement there is between the sink and pcb. Also, with the fan, make sure there is a backup mode to just go full power to a fan when it cant see a RPM output. but yes, bare bottom BM1385 pods sound nice, we'll all be waiting for your p0rn  |
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I countered my own argument, i was going to say "I'd say give more room for sinks, there will be someone with 150W BGA style cores they want to squeeze in there.."
but then i thought, "they can throw 2 maybe 3 of their cores and their own copper sink, that should suffice. Aluminium is good, but copper spread the heat quick enough from the hot spot.."
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Novak heated part of his house last winter with an AM Tube. I kept my entire apartment comfortably above freezing with a Dragon, S3-supplemented when necessary. Previous winter the house and shop were warmed substantially by AM Cubes and S1. Pretty handy.
yup, why run a space heater when you can run gear and make BTC aside from keeping warm. but sobe-it, where can you get a miner for $20 and spit out 700W of heat?! wait.. ebay, time to get the ye'ol Block Eruptor Cube.. don't need to try to find a miner for $20 when you already have them. well my foot heater doesn’t do mining.. it just burns resistors, 2 New-R-Box's did the job on keeping the room 3 degrees warmer but they lasted long. all i have left running now is a single U3. |
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Smart move.. next sue them for a few million of productivity loss? at least rub their nose in this shit customer service..
now heres a fun question, Servicing the P&P machine, can you go though another company to get parts and service, or will you still have to go though them?
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That's where it got last time they screwed up shipping. It looks like not only did they include any customer contact info, they actually sent the wrong paperwork (or was it no paperwork at all?) this time too. Kids these days...
Kids? what's wrong with them? they are cheaper labour.. Oh boy do you pay for the mistakes too! (worked in a local owned pizza shop, got to work with all the stupid though them years: "you need $15 change." Kid pulls out a 20 and 5 note: "will this do?") But, you said you're on the ball, did you manage to contact the shipping department at Ohio and get some sort of paperwork to them to sign off? |
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I picked up heatsink screws today. Heatsinks will be here tomorrow. Novak just checked on the robot; it's in Customs in Ohio and the mother@!#$& shippers didn't include ANY of the pertinent info Customs needed - AGAIN - but we're on the ball this time and should be able to minimize delays.
at least its closer to home |
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Hells yeah! Getting keen!!!
 Damn you Luke! Thanks for the nostalgia! Now where's my old 286... Who needs a 286 when DOSBox works great on a Novena? At least, that's how my children play Keen on a regular basis... 'Cause my old 286 is still running, and has dos and keen installed, and then some. plus i miss hearing that old 20MB 5.25" HDD winding up and setting the heads in place. .. i wonder how many hashes a minute that system could do :-? |
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Novak heated part of his house last winter with an AM Tube. I kept my entire apartment comfortably above freezing with a Dragon, S3-supplemented when necessary. Previous winter the house and shop were warmed substantially by AM Cubes and S1. Pretty handy.
yup, why run a space heater when you can run gear and make BTC aside from keeping warm. but sobe-it, where can you get a miner for $20 and spit out 700W of heat?! wait.. ebay, time to get the ye'ol Block Eruptor Cube.. |
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