How would you use BFL equipment with Bitminter?
You can use BitMinter client, an easy to use GUI-based miner that starts by clicking a button on the website, or any of the other miners that will support BFL ASICs. Our miner supports BFL FPGAs today, and will support BFL ASICs as soon as possible.
Also what is "rollntime"?
GBT (getblocktemplate) and Stratum are new mining protocols. Sadly, we have ended up with two competing standards.
rollntime is an improvement on the old getwork protocol (which most people are still using). It allows the miner to create new work by fiddling with the timestamp in the block, instead of constantly asking the server for more work.
Variable difficulty allows the server to set a higher target for proofs of work from miners, also reducing the constant chatter.
Without using these two features of the getwork protocol the new ASICs would create a lot of network traffic and extremely high load on the server.
Variable difficulty is also used by GBT and Stratum. Their advantage over getwork for ASIC mining is that they give the miner a template for a block which enables it to generate more work by itself than rollntime does.
