I don't have any pmax hardware to hand, but I ran up a netbsd-11 pmax
build with macallan's
machine_btop(sc->sc_vaddr + SFB_FB_OFFSET + offset);
patch on the offchance you are free to test:
https://sync.absd.org/pmax/netbsd-11-2025-11-15/ - includes iso and
kernels :)
Uh-oh. That ISO doesn't boot under gxemul either.
OK, so thats a *whole* different issue. Let me
a) Test a releng build of netbsd-11 on gxemul
b) Test building that same patch on netbsd-10 and -current
c) Grumble
Will get back to you...