Well, I have not touched the machine in a while, but recently 
I was able to put some time on it.  I also took the time to replace 
its HD with a ~1GB 3 1/2" HH one.  Here are some results with 
different boot files:

=================================> Now trying boot-newsmips-test:

NEWS> bo fh
NetBSD/newsmips Primary Boot

a0 0
a1 50007001
a2 80bffef4 (/boot)
a3 bf8000
a4 67696e66
a5 6f002e72
block_size  = 8192
block_count = 7
entry_point = 0xa0700000
reading block: 17 33 49 65 81 97 113 done
NetBSD/newsmips Secondary Boot, Revision 1.7
(tsutsui@mirage, Mon Sep 30 16:51:24 JST 2002)
HB system.
howto = 0x0
bootdev = 0x50007001
bootname =
maxmem = 0xbf8000
Booting fh(0,0,0)
trying fh(0,0,0)/netbsd...
devopen: fh(0,0,0)/netbsd
devname = fh(0,0,0), fd = 3
1765584+151148 [72592+60632]=0x1f49b8
entry = 0x80001000
ssym = 0x801d4f3c
esym = 0x801f59b8

consinit() done.
cpu_model = news3700
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002
     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 1.6H (GALANT) #130: Mon Sep 30 19:13:44 JST 2002
     tsutsui@mirage:/usr/src/sys/arch/newsmips/compile/GALANT
total memory = 12256 KB
avail memory = 9048 KB
using 178 buffers containing 712 KB of memory
SONY NET WORK STATION, Model NWS-3710, Machine ID #30145
mainbus0 (root)
cpu0 at mainbus0: MIPS R3000 CPU (0x220) Rev. 2.0 with MIPS R3010 FPC Rev. 2.0
cpu0: 64KB/4B direct-mapped Instruction cache, 64 TLB entries
cpu0: 64KB/4B direct-mapped write-through Data cache
hb0 at mainbus0
le0 at hb0 addr 0xbff80000 level 1: address 08:00:46:00:79:e7
le0: 8 receive buffers, 2 transmit buffers
mkclock0 at hb0 addr 0xbff407f8
zsc0 at hb0 addr 0xbfec0000 level 1
zstty0 at zsc0 channel 0 (console i/o)
zstty1 at zsc0 channel 1
kb0 at hb0 addr 0xbfd00000 level 2
wskbd0 at kb0 mux 1
ms0 at hb0 addr 0xbfd00004 level 2
wsmouse0 at ms0 mux 0
sc0 at hb0 addr 0xbfe00100 level 0
scsibus0 at sc0: 8 targets, 8 luns per target
scsibus0: waiting 2 seconds for devices to settle...
SC(t): [istatus=0x80, tstatus=0x2]
sd0 at scsibus0 target 6 lun 0: <SEAGATE, ST31230N, 0290> SCSI2 0/direct fixed
sd0: 1010 MB, 3992 cyl, 5 head, 103 sec, 512 bytes/sect x 2069860 sectors
SC(t): [istatus=0x80, tstatus=0x2]
boot device: <unknown>
root device: ?
use one of: le0 sd0[a-h] ddb halt reboot
root device:
<What does it need next?>

=================================> Now trying boot-newsmips-14L-nofb.fs

Testing memories: done.
12288K bytes available, 32K bytes reserved.

SONY NET WORK STATION R3000 Monitor Release 2.0A
Model NWS-3710, Machine ID #30145, Ethernet address 08:00:46:00:79:e7

NEWS> bo fh
NetBSD/newsmips Primary Boot

NetBSD/newsmips Secondary Boot
Booting fh(0,0,0)
1072536+2128992+129556 [89+47888+37487]=0x344b6c

Copyright (c) 1996, 1997, 1998, 1999
          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 1.4L (INSTALL) #5: Sun Oct 31 22:44:53 JST 1999
 
tsutsui@mirage:/usr/src/sys/arch/newsmips/compile/INSTALL
                                 total memory = 12256 KB
                                 avail memory = 7952 KB
                                 using 178 buffers containing 712 KB of memory
                                 SONY NET WORK STATION, Model 
NWS-3710, Machine ID #30145
                                 mainbus0 (root)
                                 cpu0 at mainbus0: cpu0: MIPS R3000 
CPU Rev. 2.0 with MIPS R3010 FPC Rev. 2.0
                                 cpu0: 64KB Instruction, 64KB Data, 
direct mapped cache
                                 hb0 at mainbus0
                                 le0 at hb0 addr 0xbff80000: address 
08:00:46:00:79:e7
                                 le0: 8 receive buffers, 2 transmit buffers
                                 mkclock0 at hb0 addr 0xbff407f8
                                 zsc0 at hb0 addr 0xbfec0000
                                 zstty0 at zsc0 channel 0 (console)
                                 zstty1 at zsc0 channel 1
                                 sc0 at hb0 addr 0xbfe00100
                                 scsibus0 at sc0: 8 targets, 8 luns per target
                                 scsibus0: waiting 2 seconds for 
devices to settle...

<freezes>

# dd if=boot-newsmips-1.6H.fs bs=18k of=/dev/rfd0a
68+1 records in
68+1 records out
# eject floppy
#

Testing memories: done.
12288K bytes available, 32K bytes reserved.

SONY NET WORK STATION R3000 Monitor Release 2.0A
Model NWS-3710, Machine ID #30145, Ethernet address 08:00:46:00:79:e7

NEWS> bo fh
NetBSD/newsmips Primary Boot
NetBSD/newsmips Secondary Boot, Revision 1.7
(tsutsui@mirage, Sat Sep 14 18:20:02 JST 2002)
Booting fh(0,0,0)
3788720+128968=0x3bc914

<freezes>

=================================> Now trying boot.fs

NEWS> eject fh
NEWS> bo fh
NetBSD/newsmips Primary Boot
NetBSD/newsmips Secondary Boot, Revision 1.7
(autobuild@tgm.daemon.org, Mon Sep  9 01:13:14 UTC 2002)
Booting fh(0,0,0)
3788736+127656=0x3bc404

<freezes>

=================================> Now trying boot-20020210.fs

Testing memories: done.
12288K bytes available, 32K bytes reserved.

SONY NET WORK STATION R3000 Monitor Release 2.0A
Model NWS-3710, Machine ID #30145, Ethernet address 08:00:46:00:79:e7

NEWS> bo fh
NetBSD/newsmips Primary Boot
NetBSD/newsmips Secondary Boot
Booting fh(0,0,0)
3258512+127256 [60128+50602]=0x355c48

<freezes>