That was my fear...
EDIT: Maybe SiliconInsider (Antoine) can open one up and take a peak...
EDIT2: Or maybe not! Looks like it's already been done:
https://siliconpr0n.org/map/apple/344s0061-a/single/apple_344s0061-a_mz_mit20x.jpg
My Mac II has a SWIM chip installed, and updated ROMs (the "FDHD" upgrade). I have a TL866II (though I've yet to actually use it for anything). Assuming I got the correct EPROM adapter for the SWIM PLCC, would that be something that could be dumped?
May have caught that IIsi in the nick of time for it to be saved. Will obviously need new crystal cans, and those QFPs may need replacing looking at some of those legs, but looks doable at a glance...