f80ada2e07
P5-T3 follow-up: tested the two remaining GPL psx candidates. Both match the same signatures as 2.7.2-psx but also synthesize the constant multiply, so neither resolves the recorded divergence. SETUP now also records that the old-gcc '-psx' builds are community GCC+patch reconstructions, and that the real Sony PsyQ compilers exist in the mkst/esa psyq-binaries release (not downloaded).