LPC2138

OK, LPC2138 is an ARM7TDMI, 512kB flash, 32kB ram from NXP/Philips.

I'm doing it from zero, since I plan to write some super cool OS for it.

Just an update, I've successfully written some asm routines for task switching. Which is super cool IMO! Gained quite some knowledge of ARM/LPC in the process. Also met some gas idiocies. ie. stmfd sp!, {r0-r14}^, doesn't even exist, but gas warns about some other stuff and compiles it into stmfd sp, {r0-r14}^ (no exclamation mark after sp, meaning sp isn't decremented). W/O JTAG this would be a bit more difficult.

Memory mapping

memory mapping

0x0	flash
0x4000 0000	sram
0x7fff d000	boot block
0xe000 0000	vpb peripherals
0xffe0 0000	ahb peripherals

arm exception vector locations

Read all about that on: Bootup, vectors and linker script