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Henrik RydgårdandClaude Opus 5.5
caed1bc5f2
Most homebrew ME code waits in a loop like lw t0, flag; beq t0, zero, loop; nop: Daedalus/MElib/NooDS's mediaengine.prx, snes9xTYL, PMP Mod, Yabause, FBA, the Touhou ports (with a few nops in it). Such a loop stores nothing, has only plain loads, integer ALU ops, nops and branches, and writes every register it reads before reading it in a pass, so every pass goes the same way while memory stays the same - which it does while the ME runs, since the main CPU doesn't. At the top of one, between parts of a slice, the ME interprets a pass, and if it comes back to the top, waits out the rest of the slice. Loops that also store (a heartbeat counter) or span several blocks aren't recognized, nor are delay loops counting down a register. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>