> It is possible that the code is failing due to some 'oddity' of
> your system.  It definitely works on some...
> 
> At what point does it hang?
Directly after printing the "Revision 1.26.." string. Right before it would start booting..

> What does fdisk and disklabel report for the disk geometry?
leeloo# fdisk /dev/rwd0
Disk: /dev/rwd0d
NetBSD disklabel disk geometry:
cylinders: 16383 heads: 16 sectors/track: 63 (1008 sectors/cylinder)

BIOS disk geometry:
cylinders: 1024 heads: 255 sectors/track: 63 (16065 sectors/cylinder)

Partition table:
0: <UNUSED>
1: <UNUSED>
2: <UNUSED>
3: sysid 169 (NetBSD)
    start 63, size 120103137 (58644 MB), flag 0x80
        beg: cylinder    0, head   1, sector  1
        end: cylinder 1023, head 254, sector 63

leeloo# disklabel -r /dev/rwd0
# /dev/rwd0d:
type: unknown
disk: mydisk
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 16383
total sectors: 120103200
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0 

16 partitions:
#        size    offset     fstype  [fsize bsize cpg/sgs]
 a:   1049265        63     4.2BSD   1024  8192    86   # (Cyl.    0*- 1040)
 b:   6290928   1049328       swap                      # (Cyl. 1041 - 7281)
 c: 120103137        63     unused      0     0         # (Cyl.    0*- 119149)
 d: 120103200         0     unused      0     0         # (Cyl.    0 - 119149)
 e:  40960080   7340256     4.2BSD   1024  8192    86   # (Cyl. 7282 - 47916)
 f:   2097648  48300336     4.2BSD   1024  8192    86   # (Cyl. 47917 - 49997)
 g:  16777152  50397984     4.2BSD   1024  8192    86   # (Cyl. 49998 - 66641)
 h:  52928064  67175136     4.2BSD   1024  8192    86   # (Cyl. 66642 - 119149)

> What does 'sysctl machdep.diskinfo' report?
machdep.diskinfo: 80:0(1024/255/63),2 81:0(1024/255/63),2 82:0(1024/255/63),2  wd0:80 wd1:81,82 wd2:81,82

> Have you checked the mbr boot code as well?
I've updated that, too. 

> (that hasn't been changed yet)
I just tried everything..

Regards,
Marc