Looking for some decent tutorials on how to code GBA roms from scratch.

[Nebetsu]

I recently downloaded HAM and would like to learn how to use it. Every time I pick up a "noobie FAQ" it gives me a list of guides that sound like they would be worth reading and a bunch of 404's where the guides used to be. Does anyone have any good ones?
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[pipes]

gbadev.org
all the roms, links, and docs you could want!
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