In–car systems that don’t put the CPU in standby mode when the ignition is turned off must go through the full boot–up process when the ignition is turned on.

It is important that the system can boot up fast. The system is usually required to show the initial splash screen within a half–second, have the tuner audio up–and–running in two seconds, and allow users to interact with the user interface within five seconds.

In Windows Automotive 3.5, the fast–boot solution required the user to make use of special Windows Automotive versions of the kernel and filesys components as well as a special makeimg tool.

With Windows Automotive 4.2, the OEM can use Power Manager in Windows CE .NET, and does not need special OS components.

In this Section

The following topics describe this fast–boot solution and what software changes are needed to achieve the fast–boot performance.

Reducing time to zero-out the memory

Hive–based registry in DRAM or SRAM

Fast–boot Power Management State Diagram

Other Fast–boot Considerations

Registry hive in external file system