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xemu: current features and engineering reference

Reviewed: 2026-11-01 · Source: b7140848 · Availability: current main; release differences are explicit below.

Start here to see what this fork contains, how to use it, and what the recorded results establish.

Need	Start here
Which download contains a feature?	Latest stable versus main
What exists now, and why?	Current status · Implemented mechanisms
How do I configure it?	Performance controls and defaults
What improved or regressed?	Measured results and limitations
What changed since September?	Complete current change register
What remains experimental or removed?	Research and retired work
How does xemu work?	Architecture · System · Graphics · Audio · CPU
How do I investigate or contribute?	Development · Methodology · Upstream work
How do I test GP/EP processing offline?	Experimental DSP capture, replay and fuzzing tools (PR #384; not merged)
Is there executable proof for starting HLE work?	Public DSP XISO, 100 replays and native arithmetic comparison (experimental branches)
Can DSP and native candidates be compared concurrently?	Live shadow coverage, fallback/fault controls and OpenAL loopback (experimental branches)
Which fork changes are worth offering upstream?	Contribution candidates: PR, summary and measured benefits

The latest stable checked is v0.8.136-0-g458730bf5373, published September 30. November main contains later audio, depth foundations, testing and CPU work; these are not automatically present in that download. Release details.

Implementation is valuable for correctness, reliability, compatibility and diagnosis as well as speed. Measured gains belong to their exact builds and scenes. The October comparison includes a substantial Windows PGR2 gain and a Deck PGR2 regression; it does not benchmark November main. Read the complete outcome.

History and specialist reference

Keep the dated September 26 status, PR lessons, hardware observations and fidelity boundaries for their original evidence and reasoning. Their old recommendations do not override the current register. Wiki maintenance and publication describes how current pages are reviewed.