Lpc2000

I'm new to ARM.  I'm using the Keil toolchain and need to port some ARM 
ASM written for the IAR toolchain & the documentation on Keil ASM is 
pretty weak from what I've seen so far.  I'm pretty good at Keil '51 
ASM but am having trouble deciphering how to port this IAR code.

Are there any good texts I can go to?  I've tried the ARM website and 
been pretty overwhelmed by the density of links there and am not sure 
where to start.  Any help from the group?

Thanks,

Chip Burns