Since Decred is using blake256, I will be setting up mining on my windows machine because it has a better graphics card.

Info for the setup came from here:

https://forum.decred.org/threads/public-testnet-binaries-source-code-and-documentation.334/

Download the binaries:

https://github.com/decred/dcrd/releases/tag/v0.0
https://github.com/decred/cgminer/releases/tag/v0.0

The quick reference guide will help you:

https://wiki.decred.org/Quick_Reference

Start the decred daemon the first time:

dcrd.exe -u YourUserName -P YourPassword

Start the decred wallet and get a new address:

dcrwallet --create
dcrwallet --dcrdusername=YourUserName --dcrdpassword=YourPassword /noclienttls

You will need to set up a passphrase that you should save. You will need it to unlock your wallet later.

Your wallet will get created somewhere here:

C:\Users\YourWindowsUserName\AppData\Local\Dcrwallet\testnet

Get a new address:

dcrctl --testnet -u YourUserName -P YourPassword --wallet getnewaddress

At this point, you will not need this wallet open to start mining, so you can shut it down, but you can unlock it and check the balance anytime you want when the wallet is running.

dcrctl --testnet -u YourUserName -P YourPassword --wallet getbalance
dcrctl --testnet -u YourUserName -P YourPassword --wallet walletpassphrase "your passphrase here" 9999999

Shut down and start the decred daemon again. Note that if you are on windows, you will need the –notls flag if you want to mine:

dcrd.exe --notls -u YourUserName -P YourPassword --miningaddr=YourNewDecredAddress

Now to start mining:

cgminer.exe --blake256 -o http://127.0.0.1:19109 -u YourUserName -p YourPassword --intensity d