Hi,
I keep wondering how more advanced mainboards work, in handheld systems =
for example - my main question is, what sort of physical structure does =
the "data bus" have, and how (for example) would you define which device =
on the system has which memory range.  For example, the Cybiko handheld =
games system; the LCD controller is accessible at one memory range, the =
RAM chip at another, the ROM at yet another.  The expansion port has yet =
its own range.  What about I/O ports (such as on x86 architecture)?

Thanks,
Kieren Johnstone

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