Old MIPS/ARM PDAs for Teaching?

Barak Pearlmutter asks: "I'm teaching computer architecture this spring. The course involved a lot of assembly programming, and in the past has used a SPARC simulator. I'd like to get a bunch of PDAs with RISC processors (ARM or MIPS) instead. This requires a development environment that runs under Linux and supports assembler...and some PDAs. The less memory and the slower the CPU the better! Also no virtual memory or real OS to get in the way - best to have direct access to the display and buttons."

"It seems like companies must be sending 128k MIPS handhelds to the landfill at this point, so giving them to us to use in teaching would be a win/win, since they'd get a tax writeoff and some good will instead. But even if they cost $20/ea, that would be fine. Any suggestions on what hardware to use, or what companies to contact? Remember, there must be a convenient way to download executable code into them, using a cable rather than a flash ROM. And we're pretty much a Debian GNU/Linux shop, so a working cross-compiler based on the GNU toolset would be best. An emulator would be even peachier, so students could debug without downloading the code after each little change, although that's not strictly necessary."

SPIM!

[boopus]

I can't really add too much usefull information, but I would question the usefullness of using real PDA's instead of a simulator. I just finished taking a basic computer architecture class from Patterson of Patterson & Hennesy and we used spim as a simulator. If you are trying to learn assembly language, the debugging tools availabel in a simulator are going to be far better, and I suspect any real development(And hence learning) are going to occur with the simulator, and the uploading and running on the PDA will be something you do at the end of the lab as a neat trick. That being said, it'd be a cool neat trick.