Beaglebone Black OS from scratch 100% ASM

[Ycep]

small can be beautiful, so long as it is also clear and complete

That is what my Serbian teacher says before giving us title for essay.

[Factorisable]

Thank you lansjack.

Canard, i assume the ARMv7 reference manual is mainly about instruction set and how does ARM assembly language look ?

[canard]

If you just want to learn assembly programming I would recommend finding resources for beginners. You can use a debugger like GDB to step through a C program you've written and see how each instruction changes the state of the CPU.

I learned assembly programming in school using a MIPS emulator. There's not much difference between CPU architectures if you understand the basics (registers, loads, stores, arithmetic), so you can start with x86 if that's easier for you. Learning C is also a good way to become familiar with assembly. Working with baremetal hardware introduces extra complexity that won't help you learn.

You could look into the Arduino boards with an ARM cortex-m3. Arduino provides an easy path for a beginner to start working with baremetal hardware.

The armv7 document isn't useful for teaching yourself assembly. I use the armv7 doc for looking up the more obscure behavior relating to exception handling and MMU.