I tried using 1.5 and received a panic during kernel initialisation.
After I saw in the list that the problem is known I tried the
latest available snapshot (20010114).

That's what I get:
ok boot /pci@1f,4000/scsi@3/disk@8,0:b
Boot device: /pci@1f,4000/scsi@3/disk@8,0:b  File and args: 
NetBSD IEEE 1275 Bootblock
..>> NetBSD/sparc64 OpenFirmware Boot, Revision 1.3
>> (eeh@nonplus.netbsd.org, Sat Jan 13 09:08:17 PST 2001)
loadfile: reading header
elf64_exec: Booting /pci@1f,4000/scsi@3/disk@8,0:b/netbsd
3233760@0x1000000+218560@0x1400000+538336@0x14355c0 
symbols @ 0xfefa4340 84+247680+127537 start=0x1000000
chain: calling OF_chain(800000, ed60, 1000000, fff89a80, 18)
[ using 376144 bytes of netbsd ELF symbol table ]
prom_get_msgbuf: Cannot recover msgbuf on E250
prom_get_msgbuf: allocated new buf at 00000000
prom_get_msgbuf: claiming new buf at 00000000
pmap_bootstrap: could not claim physical dseg extention at fcba000 size 346000
Setting DTLB entry 00000000 01000000 data e0000000 0f800076
Setting DTLB entry 00000000 01400000 data e0000000 0f400076
Setting ITLB entry 00000000 01000000 data e0000000 0f400076
Setting TSB pointer 00000000 014ca000
consinit()
setting up stdin
stdin instance = fff8d238
setting up stdout
stdout instance = fff8d7f8
stdout package = f006ddb4
console is unknown
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 1.5Q (GENERIC) #12: Sun Jan 14 10:54:27 PST 2001
    eeh@nonplus.netbsd.org:/home4/src/sys/arch/sparc64/compile/GENERIC
total memory = 256 MB
avail memory = 228 MB
using 1651 buffers containing 13208 KB of memory
bootpath: /pci@1f,4000/scsi@3,0/disk@8,0:b
mainbus0 (root): SUNW,Ultra-250
cpu0 at mainbus0: SUNW,UltraSPARC-II @ 248 MHz, version 0 FPU
cpu0: physical 4K instruction (32 b/l), 4K data (32 b/l), 2048K external (64 b/l) 
psycho0 at mainbus0 addr 0xfffbc000
psycho: impl 0, version 4: bus range 0 to 0; PCI bus 0
DVMA map: fe002000 to ffffe000
pci0 at psycho0
pci0: i/o space, memory space enabled
Sun Microsystems psycho PCI controller (host bridge) at pci0 dev 0 function 0 not configured
ebus0 at pci0 dev 1 function 0
ebus0: Sun Microsystems PCIO Ebus2, revision 0x01
auxio0 at ebus0 addr 726000-726003 addr 728000-728003 addr 72a000-72a003 addr 72c000-72c003 addr 72f000-72f003
power at ebus0 addr 724000-724003 not configured
SUNW,pll at ebus0 addr 504000-504002 not configured
sc at ebus0 addr 500000-500007 not configured
se at ebus0 addr 400000-40007f ipl 43 not configured
se at ebus0 addr 200000-20007f ipl 35 not configured
com0 at ebus0 addr 3083f8-3083ff ipl 41: ns16550a, working fifo
kbd0 at com0
com1 at ebus0 addr 3062f8-3062ff ipl 42: ns16550a, working fifo
ms0 at com1
lpt0 at ebus0 addr 3043bc-3043cb addr 300398-300399 addr 700000-70000f ipl 34
clock0 at ebus0 addr 0-1fff: mk48t59: hostid 80a9847a
flashprom at ebus0 addr 0-fffff addr 0-fffff not configured
SUNW,envctrltwo at ebus0 addr 600000-600003 ipl 40 ipl 37 not configured
hme1 at pci0 dev 1 function 1: address 08:00:20:a9:84:7a
nsphy0 at hme1 phy 1: DP83840 10/100 media interface, rev. 1
nsphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
panic: psycho_intr_map: line line < 0 || line > 0x32
kdb breakpoint at 1262dd0
1 tt=1ff tstate=0 tpc=0x0 tnpc=0x0
Stopped in pid 0 (swapper) at   cpu_Debugger+0x4:       nop
db> trace
psycho_intr_map(900, 0, ef, 180922c, 0, 0) at psycho_intr_map+0x18
pci_intr_map(0, 180922c, 0, 1c01b68, e0030000, 1c01bc8) at pci_intr_map+0x84
hmeattach_pci(1bd5a80, 1c01800, 1809490, 1224ee0, 1bf7d10, 1bf7d18) at hmeattach_pci+0x130
config_attach(1c01800, 140b248, 1809490, 0, 140fc00, 140a000) at config_attach+0x3b4
config_found_sm(1bd5a80, 1809490, 1217db0, 1217f88, 50a00ef, 0) at config_found_sm+0x24
pci_probe_bus(1bd5a80, 8, ffff, 2, 1bd5d00, 1bd5c80) at pci_probe_bus+0x234
pciattach(12bb7f0, 1bd5a80, 18097f0, 1217ba0, 1bf7f90, 1bf7f98) at pciattach+0x200
config_attach(1bd5a80, 140b248, 18097f0, 0, 140fc00, 140a000) at config_attach+0x3b4
config_found_sm(1bc3b00, 18097f0, 12252a4, 0, 1bd5d00, 1bd5e00) at config_found_sm+0x24
psycho_attach(1bd5f00, 1bc3b00, 1809ab0, 122517c, 1bf7fc0, 1bf7fc8) at psycho_attach+0x118
config_attach(1bc3b00, 140b248, 1809ab0, 0, 140fc00, 140a000) at config_attach+0x3b4
config_found_sm(1bd5f00, 1809ab0, 124f2ec, 0, 1809ad0, 130c000) at config_found_sm+0x24
mainbus_attach(130c2e0, 142da48, 130c280, 130c2d8, 130c2c8, 130c290) at mainbus_attach+0x39c
config_attach(1bd5f00, 140b248, 0, 0, 140fc00, 140a000) at config_attach+0x3b4
config_rootfound(130c160, 0, 1412f88, 0, 1bd6e00, 1bd6e08) at config_rootfound+0x44
cpu_configure(148e000, 148e020, 140b378, 0, 0, 129f740) at cpu_configure+0x3c
configure(14b0c00, 14b0800, 14b0800, 14aec00, fffffffffffffc00, e48e000) at configure+0x50
main(1489c00, 148cc00, 14b3400, 20000, 142d800, 0) at main+0x410
cpu_initialize(14097b0, 0, 1000000, e0000000, f400076, 100a4d8) at cpu_initialize+0x3f8
db> 

-- 
B.Walter              COSMO-Project         http://www.cosmo-project.de
ticso@cicely.de         Usergroup           info@cosmo-project.de