Bug#276895: Sparc pre-rc2 netinst ISO won't boot on Ultra 1

[lists@thegoldenear.org]

Package: install
Version: pre-rc2

Architecture: Sun Ultra 1 Workstation Model 170 (A11); Sun Ultra 1 SBus (UltraSPARC 
167MHz); OpenBoot 3.5, 192 MB memory installed

Using debian-installer pre-rc2, when I try to boot using the netinst ISO the installation hangs 
upon initially running, here:

RAMDISK: Couldn't find valid RAM disk image starting at 0.
Freeing initrd memory: 2049k freed
cramfs: wrong magic
Kernel panic: VFS: Unable to mount root fs on 00:00
 Press L1-A to return to the boot prom

(I left it a few hours and when I returned it had added:
sunmouse: successfully adjusted to 1200 baud.)