Ok guess it's time to go back to figuring out how to get Amiga UNIX to map Zorro III addresses and I suspect this is going to involve writing my own page table manipulation code because what's shipped doesn't like dealing with anything that's >24 bit and uh can't really fit 128MB of GPU memory in 24 bits

I do love that I can just stick a kernel image built in 1991 into Ghidra and it's happy to go brrrr

Haha looking at my old code for this and "Copyright 2020 Google LLC" I really do need to do something about that

Ooh onto the "THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T" part of the evening better not tell you that phystopfn(paddr) is defined as ((u_int)(paddr) >> PNUMSHFT) otherwise I might get in even more trouble

(Anyone out there got the source code to the M68K port for SVr4? Github only has i386 and, well, it's not /quite/ the same)

@mjg59 sorry, nope