Can someone tell me please, how to POS mine nexus^ Which count of coins is needed? Does POS mining possible with POW at the same PC?
For Nexus Proof of Stake you simply need to have your wallet open and unlocked for block minting only (if encrypted). You can stake with any amount of coins but a minimum of 1000 NXS is recommended to maintain a Trust key. You first transaction will be called a Genesis Transaction which essentially establishes your Trust key on the Nexus Network. You will then receive Trust payments when you stake blocks.
As far as using the wallet for both, you can but from my understanding it is best to keep a separate wallet for mining.