OEM Abstraction Layer
The OAL contains the code that creates an abstraction of the operating system kernel independent of a specific physical platform implementation. This enables the common kernel[1] of Windows Embedded CE to function on several platforms.
The OAL implements the system’s starting code, interrupt processing code (ISR, support for installed ISR, a table of interrupt request (IRQ) static mapping in system interrupt (SYSINTR), and so on), power management code (On, Off, and Idle power states), timer code, and various IOCTL control codes (IOCTL_HAL_GET_DEVICE_ID, IOCTL_HAL_GET_UUID, and so on), The OAL provides an interface to the system kernel by implementing a certain set of functions and IOCTL.
At the same time, the system kernel ...
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