[c-nsp] 7204VXR crashing when trying to load 12.2(33)SRC4

[Jared Gillis]

Hello all,

I'm trying to get a lab 7204VXR (NPE-400) up and running on SRC code, and am having no luck.
I've loaded it up with 12.2(33)SRC4 ipbase, and 12.2(33)SRD3 ipbase, and the router locks or crashes on boot each time:

Cisco IOS Software, 7200 Software (C7200-IPBASE-M), Version 12.2(33)SRC4, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Mon 11-May-09 16:53 by prod_rel_team
Image text-base: 0x60009304, data-base: 0x61E147E0

Cisco 7204VXR (NPE400) processor (revision A) with 491520K/32768K bytes of memory.    

It will either crash there and reload, or sit there forever. I've tried making it use SRC boot code, to no effect.

None of the docs I can find say anything more than 7200 is supported (no breakdown on required NPE or IO modules). Has anyone had any luck getting 12.2SR code of any kind running on a 7204VXR? If so, any advice?
Thanks!

-Jared