* Add Platform::Log and Platform::LogLevel
* Replace most printf calls with Platform::Log calls
* Move a brace down
* Move some log entries to one Log call
- Some implementations of Log may assume a full line
* Log the MAC address as LogLevel::Info
* non-defined CPU modes are actually possible
* bit4 of all PSRs is forced to one (modes 00-0F aren't possible)
* modes 14/15/16 and 18/19/1A share a SPSR with modes 17 and 1B respectively (but they don't share the register banks)
* modes 10 and 1C/1D/1E don't have a SPSR (MRS returns the CPSR always)