You can mine EMC using SHA-256 ASIC miners by directing them to a Proof-of-Work (POW) mining pool.
Sign up to the pool : pool.emercoin.com and navigate to the tab: My Account / My Workers where there will already have been created default worker "UserName.1" with password - "x". Optionally you can create some more usernames and passwords for your miners.
Now give your mining program the following details:
Pool address: pool.emercoin.com
Pool port: 3333
Worker Name: UserName.1 (or as created during pool setup)
Password: x (or as created during pool setup)
For example, this is the command line to run for cgminer:
cgminer -o pool.emercoin.com:3333 -u User.1 -p x
If everything is ok then after a while you will see in the statistics window your username, the power of your miner and the number of mined coins.