NetBSD/alpha fails to install on AlphaStaion DS15

log

AlphaStation DS15 Console V7.2-2, built on Jun  9 2006 at 15:45:46
>>>boot dqa0
(boot dqa0.0.0.13.0 -flags a)
block 0 of dqa0.0.0.13.0 is a valid boot block
reading 13 blocks from dqa0.0.0.13.0
bootstrap code read in
base = 2be000, image_start = 0, image_bytes = 1a00(6656)
initializing HWRPB at 2000
initializing page table at 1fff0000
initializing machine state
setting affinity to the primary CPU
jumping to bootstrap code

NetBSD/alpha 6.1.1 ISO 9660 Primary Bootstrap
Jumping to entry point...

NetBSD/alpha 6.1.1 Secondary Bootstrap, Revision 1.13

VMS PAL rev: 0x1000700010162
OSF PAL rev: 0x100070002015c
Switch to OSF PAL code succeeded.

Boot flags: a
10205376+201944=0x9ed480

Entering netbsd at 0xfffffc0000431230...

NetBSD does not yet support system type 38 (???).

panic: platform not supported
Stopped in pid 0.1 (system) at  fffffc0000496e18:       ret     zero,(ra)
db>