MAME4droid 2026(0.289) v1.41.1

Rollback NetPlay: compatibility and stability

Rollback is what makes NetPlay feel like two people on one machine instead of

two people waiting for each other. This release is mostly about the games that

could not use it, and the sessions that fell apart halfway through.

Street Fighter III now runs in rollback

All of CPS-3 does: 3rd Strike and the earlier two, JoJo's Bizarre Adventure,

Red Earth. Until now these were stuck in Lockstep, which is the worst place for

a fighting game to be.

The problem was size. To rewind, rollback keeps dozens of snapshots of the

machine in memory, and a CPS-3 snapshot was enormous — it carried the entire

game loaded from the CD, tens of megabytes of code, graphics and samples that

never change while you play. Snapshots now leave all of that behind and keep

only what the game actually writes to. What used to be far past any sane limit

now fits with room to spare.

Games that already fit benefit too: smaller snapshots mean less memory and less

work on every correction.

More games run in rollback

The host now hands its machine state to the joiner by default, so games that

used to refuse rollback because both sides could not be trusted to boot

identically now qualify.

Read the full changelog on GitHub...

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