| Unfortunately I've not been able to build a working kernel yet (it
 | freezes after initializing the screen, no text gets printed).  I'll
 | try again later tonight.

If you don't use GENERIC, check IOM_RAM_BEGIN. it specify physical
address not P1 address.
and I changed bootstrap stack to below the 'start'. Is it not safe?
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UCHIYAMA Yasushi
uch@vnop.net