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Innosilicon A2 Terminator Scrypt ASIC RPi OC Mod
15, Aug 2014
Innosilicon still has not made any release of the source code of their cgminer fork with support for the A2 Scrypt ASIC chips, what you get with their A2 Terminator Scrypt ASIC devices is a Raspberry Pi with a preloaded cgminer and simple web interface to control the device. The standard web interface however is a bit limited in the supported operating frequencies – 1000 and 1200 MHz. The recompiled cgminer does allow for a few more operating frequencies to be used, however they are not selectable by default through the web interface of the miner. Some time ago there was a modified image released by a user called Emdje that supposedly allowed more overclock options. However it has turned out that it was not really functional as even though you could select operating frequency at steps of 5 MHz the cgminer did not accept these values and instead defaulted to some of the supported frequencies.
Back when we first had the chance to do a remote test of a A2BOX Scrypt ASIC miner we have discovered that the only supported operating frequencies by the Innosilicon A2 Terminator Scrypt ASIC miners are: 1000, 1080, 1100, 1200, 1280, 1300 and 1400 MHz. This is why we have made a modification to the standard RPi image that ships with the A2 miners, so that you can quickly and easily add the supported frequencies to be selectable from the web interface of the miner. This should allow you to squeeze some more extra performance from your device, regardless if it is the smaller 2 module or the large 6 module ASIC model, as our tests have shown that most of the miners should be able to work pretty well at up to 1280-1300 MHz up from the maximum of 1200 MHz that you have by default. Below you can download the modification we have prepared along with the instructions on how to update your miner, so that you get the extra OC options available.
How to login to your miner via SSH/SFTP using putty/WinSCP:
– username: pi
– password: innosilicon
Where to find the miner and web interface:
/var/www
Replace the index.php file with the following modification:
– modified index.php
All that is left is to refresh the webpage with the miner interface and you should see the new options for operating frequencies available in the dropdown boxes for the A2 modules. For the smaller miners you need to select just the first two frequencies as you can see on the image above, for the large A2 miners you need to set all of the six frequencies. Do note that each of the modules can operate at a different frequency, so experiment and set the best frequency for each one that gives the lowest HW error rate and optimum performance.
PiMP or Portable Instant Mining Platform is a dedicated Linux-based mining distribution intended for GPU and ASIC mining without the need to rely on Windows. PiMP is designed to be easy to deploy and use, it can be installed on a USB flash drive, so you do not necessarily have to use a hard drive on your GPU mining rig, though you can install it on SSD or HDD as well. The latest version of PiPM is designed for AMD GPUs only as well as Scrypt ASIC miners such as Gridseed and ZeusMiner, and you can also use other popular SHA-256 ASIC miners. In terms of GPU support you can mine not only Scrypt (Already pointless for GPU mining), but also Scrypt-Jane, Scrypt-N, Quark, X11, X13, X15, Keccak, Skein, Groestl, Qubit, HEFTY1, JHA and NIST5. As you can see not all of the latest and GPU algorithms are yet supported, but the most commonly used and supported ones are available in the distribution.
And while the latest version of PiMP is still only available for AMD-based GPU mining rigs, there is already work being done for the addition of a version of the Linux mining distribution intended for miners using Nvidia-based GPUs (you can try the already available KopiemTu for Nvidia). There is also work being done on an ASIC only version designed for PCs as well as for Raspberry Pi controllers to be used as mining controllers for ASIC miners. So we are looking forward to seeing these versions as well and meanwhile you can check out the AMD/ASIC version that is already available. Here we are more of a Windows miners, however we do like to try out new things as well and check out Linux-based mining distributions like PiMP as well as use RPi as a mining controllers as well and we like what we are seeing so far with PiMP.
– For more information and to try out the PiMP Linux mining distribution yourself…
Quark (QRK) Quark-based alternative cryptocoin
29, Jul 2014
Quarks are a form of online payment system but in a decentralized monetary system. Quarks to Friends, Family Members & Online Payments. Free of charges and chargebacks. Military Grade Encryption. No Bank or Government Control. Quark Coins are based on the original idea of Bitcoin but improved, more secure, with improvements to design and security. There is also a greater coin supply with higher block rewards for miners.
Website:
– http://www.quarkfoundation.cc
Block Explorer:
– https://coinplorer.com/QRK
– http://e-pool.net/explorer/QRK/
Coin Specifications
- Quark Algorithm
- Total of 247 million QRK will be mined in ~ 6 months, after that ~ 1 million QRK
- 2048 QRK per block (halving every 60480 blocks ~ 3 weeks)
- Block reward will never drop below 1 QRK
- Quick block generation: 30 seconds
- Difficulty re-targets every 20 blocks (maximum 10% up or 50% down)
- Transaction confirmation time: 6 blocks or ~9 minutes
- Block maturity time: 100 blocks or ~2 hours
- Kimoto Gravity Well for difficulty readjustment
Wallet:
– Windows
Source Code:
– at GitHub
Ports:
– RPC Port: 8372
– P2P Port: 8373
Mining Pools:
– https://qrk.suprnova.cc/
– http://qrk.e-pool.net:8910/static/
Coin Exchanges:
– Bleutrade