Boot Netbsd on ps2.

Who know.
As in Linux an environment start of kernel Netbsd differs from attempt to=
 load and execute netbsd as ELF file.

I install in my SCPH-75008 modchip and laser head protection. It has allo=
wed to start and use soft with DVD-r=20
disks written down by me.
I get dvd image uLaunchELF and burn DVD-r.(http://www.ps2-scene.org/forum=
s/showthread.php?t=3D37242)
Boot playstation from that dvd.
Then i try load and run netbsd kernel compiled as elf for ps2 from umass =
device and ......? black screen on=20
tv :)=20
Load fail or not ? How test?
Thanks.
PS=20
Sorry if my english not clean.