Cheapest hardware for Ada development (ARM7TDMI)?

[usenet at andreas-s.net (Andreas Schwarz)]

Hi,

I would like to do embedded Ada development, nothing specific, just for
fun and to get some experience. What is the cheapest hardware I can use
with RTEMS and GNAT? I have experience with the ARM7TDMI-based
controller families by Atmel and Philips. Is there any chance I can port
RTEMS to such a target (e.g. 256K ROM, 64K RAM) and make it work with GNAT?

Thanks
Andreas