I happen to have a spare Enterprise 450 lying around, so I tried booting 
from the 2.0 sparc64cd.iso.  This is what happened:

Sun Enterprise 450 (3 X UltraSPARC-II 296MHz), No Keyboard
OpenBoot 3.22, 2048 MB memory installed, Serial #8932416.
Ethernet address 8:0:20:88:4c:40, Host ID: 80884c40.

{1} ok boot cdrom
Boot device: /pci@1f,4000/scsi@2/disk@6,0:f  File and args:
NetBSD IEEE 1275 Bootblock
..>> NetBSD/sparc64 OpenFirmware Boot, Revision 1.7
>> (builds@build, Thu Dec  2 02:33:41 UTC 2004)
devopen: getdisklabel sez no disk label
devopen: search_label sez no disk label
loadfile: reading header
elf64_exec: Booting /pci@1f,4000/scsi@2/disk@6,0:f/netbsd
4879848@0x1000000+5406424@0x1800000+2982184@0x1d27ed8
symbols @ 0xfefec380 133 start=0x1000000
chain: calling OF_chain(800000, cbb8, 1000000, fff7fa80, 18)
Fast Data Access MMU Miss
{1} ok

Is this expected?

-- 
Ben Harris