I tried to install 3.0 on Jornada 680. There was a problem that hpcboot 12 
did not work. TLB miss if I remember.
After that I tried hpcboot 9 and it worked ok and the install kernel also 
worked ok. I used this command to extract sets and capture output:

tar zxpvf BASE.TGZ >x 2>&1

There is a lot of errors and I don't know why that happens. Normally those 
error messages occur at the same time when tar is extracting files. In 
the listing below the errors come first, however.

tar: Invalid header, starting valid header search.
tar: Header checksum 12536 does not match 15423
tar: Invalid header, starting valid header search.
tar: Header checksum 11733 does not match 11570
tar: Header checksum 12237 does not match 12074
tar: Header checksum 12550 does not match 12242
tar: Header checksum 12076 does not match 35413
tar: Header checksum 12402 does not match 35353
tar: Header checksum 12746 does not match 35353
tar: Header checksum 12134 does not match 23441
tar: Header checksum 12746 does not match 24625
tar: Header checksum 12746 does not match 24427
tar: Header checksum 12746 does not match 23520
tar: Header checksum 12746 does not match 13656
tar: Header checksum 0 does not match 16044
tar: Header checksum 12746 does not match 13465
tar: Header checksum 0 does not match 115302
tar: Header checksum 12746 does not match 14212
tar: Header checksum 0 does not match 120613
tar: Header checksum 0 does not match 17057
tar: Header checksum 0 does not match 17373
tar: Header checksum 12746 does not match 14043
tar: Header checksum 12746 does not match 14520
tar: Header checksum 12746 does not match 33266
tar: Header checksum 12600 does not match 13354
tar: Header checksum 12434 does not match 13454
tar: Header checksum 13214 does not match 40401
tar: Invalid header, starting valid header search.
gzip: data stream error
tar: End of archive volume 1 reached
tar: ustar vol 1, 273 files, 9385715 bytes read, 0 bytes written in 73 secs (128571 bytes/sec)