I have attempted to build an up to date kernel. On March 29, I fetched
everything which looked like it had changed. (I know there is sup for
this, but sup is not one of the protocols which is transparent through
our firewall).

Anyway, I think I got everything, and I definitely got all of sys/arch/sun3
and sys/arch/m68k. The system repeatably crashes when I do a heavy ppp
transfer. Here is the stack trace (modulo transcription errors):

    _trap(8,145,ec)
    sun3_mmu_specific(?)
    _dumpmem(ed2fca8,80,0,e06875b,e089980) + 38
    _regdump(ed2fcf8,80,2304,e505800,0) + 196
    _trap(8,105,e0797b6) + 202
    sun3_mmu_specific(?)
    _zsoverrun(e512000,e0797b6) + 38
    _zstty_softint(e505864,1,3,118,e50dfa0) + 4a
    _zsc_intr_soft(e505800) + 3c
    _zssoft(0,0,30,e552d00,ed2fe20) + 3c
    _isr_autovec(6c) + 64
    __isr_outovec(?)
    _mi_switch(2004,4,4,0,ed2ff7c,8dc) + a
    _tsleep(e08c7f4,118,e019f48,ea56) + 146
    _sys_select(e524e000, ed2ff84,ed2ff7c) + 1e8
    _syscall(5d) + 13c
    _trap0() + e


diff GENERIC HAROLD:

    1,2d0
    < #	$NetBSD: GENERIC,v 1.27 1996/03/26 15:15:50 gwr Exp $
    < 
    4,5c2,4
    < # GENERIC Sun3 (3/50, 3/60, 3/110, 3/160, 3/260)
    < # Supports root on: ie0, le0, sd*, ...
    ---
    > # Local Sun3/50 config
    > # No nfs
    > # Supports root on: sd*, ...
    12c11
    < options 	FPU_EMULATE
    ---
    > #options 	FPU_EMULATE
    25,26c24,25
    < options 	NFSSERVER			# nfs server support
    < options 	NFSCLIENT			# nfs client support
    ---
    > #options 	NFSSERVER			# nfs server support
    > #options 	NFSCLIENT			# nfs client support
    40c39
    < options 	NFS_BOOT_RWSIZE=1024
    ---
    > #options 	NFS_BOOT_RWSIZE=1024
    75,76c74,75
    < ie0 at obio0 addr ? level ?
    < ie1 at vmes0 addr 0xffe88000 level 3 vect 0x75
    ---
    > #ie0 at obio0 addr ? level ?
    > #ie1 at vmes0 addr 0xffe88000 level 3 vect 0x75
    87,88c86,87
    < si0 at vmes0 addr 0xff200000 level 2 vect 0x40
    < si1 at vmes0 addr 0xff204000 level 2 vect 0x41
    ---
    > #si0 at vmes0 addr 0xff200000 level 2 vect 0x40
    > #si1 at vmes0 addr 0xff204000 level 2 vect 0x41
    109c108
    < cgfour0 at obmem0 addr ?
    ---
    > #cgfour0 at obmem0 addr ?
    127c126
    < cgtwo0 at vmes0 addr 0xff400000 level 4 vect 0xA8
    ---
    > #cgtwo0 at vmes0 addr 0xff400000 level 4 vect 0xA8