An actual 720 ROM image of HPC2000 or some generic build?
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The SA-1110 was ARMv4, but supported unaligned access faults. Notably, I don't have those hooked up - I was hoping CE wouldn't use them - but I guess I should have a look.
Snake-eyes on that one, sadly. I put a few printfs into the 32-bit and 16-bit read and write functions in the event of a misaligned read or write, none are ever printed.
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So far I've worked out that there seems to be some list of tasks that need to be completed in order to bring up the system, which is sensible enough. Once the kernel is brought up, there's a function with a check at 13E2C (virtual) of R3, then at 13E30 it loops back if it's > 0.
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R3 starts at 0x12 on entry to the function and gradually decrements as various bring-up tasks are completed (based on observing kernel calls and reads/writes to hardware registers). R1 increments, but at a strangely different rate. R3==3, R1==0x10 seems to be the failure point.
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