That's very interesting. IRQ required for FDC to even start activity - I wonder if that is part of ADFS's detection scheme.pin 40 (fintr* according to the RPC schematics). However, the trace is broken. it looks like an isolated blob of corrosion that was only obvious when I cleaned everything up with IPA to remove the worst of the flux.
Statistics: Posted by IanJeffray — Tue Sep 30, 2025 10:28 pm