> Aha.  I think I've got the reason why syscall number in r9 is not
> optimal for OpenBSD/m88k.  The largest storage consuming system call
> is mmap, which would occupy eight 32bit registers and r9 should be
> free for it.  The change was neccessiated by off_t change, I guess.

I think it makes sense, then, to provide r10-r12 as some room for
expansion and to use r13 for the syscall number, then, as done in
OpenBSD.

Should we set up a port-m88k list?  Or would it attract too many of
the "Do you need a tester?" mails?  :-)

-allen