This is a little introduction to pocket pc processor types. If you install Microsoft visual studio you will see the following folders: armv4, armv4I, arm, mips, mips16, etc. Each folder contains optimized binaries for each processor type.

ARM is a processor architecture, you can find details about it at http://www.arm.com/documentation. It is used as the core for processors like PXa250.

• ARMv4 stands for 32 bit ARMv4 instructions. It is for Pocket PC 2000 and Pocket PC 2002.
• ARMv4T 'T' stands for Thumb. Thumb is the ARM 16 bit instruction mode
• ARMv4I 'I' stands for Interworking. This allows for 32-bit and 16-bit instructions to co-exist.

Remember Xscale processors are also ARM processors so you need to deploy ARM cab to it.