What are the issues with it? DIAG 210/250 only support 24/31-bit addrs? Maybe I'm being a bit naive, but wouldn't it be a simple matter to allow the use, but only if there's less than 2GB of storage? And maybe use SAM31/64 to switch in and out of 64-bit mode? Oh yea, there might be a slight problem with "int" and "long" usage, but that should be fixable also.
(Just asking before I post a patch so I don't make a COMPLETE fool of myself... ;-)) Leland