jmcneill@invisible.ca wrote:

> Furthermore, I am unable to boot a 3.x+ GENERIC kernel with an  
> already-installed system -- if I build a custom (smaller) image, all  
> works well.

Just FYI, older (pre-2.0) bootloader (bootxx + ofwboot) can't load
lager kernels than ~5MB.
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/macppc/stand/ofwboot/Makefile#rev1.42
---
Izumi Tsutsui