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In a raw Itanium, a "Processor Abstraction Layer" (PAL) is integrated into the system. When it is booted the PAL is loaded into the CPU and gives a low-level interface that abstracts some instructions and gives a mechanism for processor updates distributed via a BIOS update.
During BIOS initialization an additional layer of code, the "System Abstraction Layer" (SAL) is loaded that gives a uniform API for execution-specific platform functions.
On top of the PAL/SAL interface sits the "Extensible Firmware Interface" (EFI). EFI is not part of the IA-64 architecture but by convention it is needed on all IA-64 systems. It is a easy API for access to logical aspects of the system (display, storage, keyboard, etc) combined with a lightweight runtime environment (same to DOS) that allows basic system administration tasks such as configuring storage adapters, flashing BIOS and running an OS boot-loader.
Once the OS has been booted, some aspects of the PAL/SAL/EFI stack remain resident in memory and can be accessed by the OS to perform low-level tasks that are implementation-dependent on the underlying hardware.
Q. Define Logical data as operand data type? Every word or byte is treated like a single unit of data. Whenever an n-bit data unit is considered as comprising n 1-bit items of
Design of structure chart - Standard quality structure charts result in programs that are modular, reusable and simple to execute. - Measures include: Cohesion
where can I find detailed explanation of 6 stage and 7 stage pipeline ??
Use "Edit->Paste As->New Image" menu command or press Ctrl-Shift-V key combination, then save newly created image.The script-fu-selection-to image can also be used to cut a selecti
How is a property designated as read-only? In VB.NET: Public Read-Only Property Property Name As Return Type Get? Your Property execution goes in here End Get End Property.
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri
What are the major functions of IO system? i. Interface to the CPU and memory by the system bus. ii. Interface to one or more IO devices by tailored data link.
calculate the number of states per unit volume in an energy interval of 0.01eV above the Fermi energy of Na metal. The Fermi energy of Na at 0 K=3eV.
how to find the integral of a function represented by collection of experimental data
What is a Priority Interrupt? Ans: A priority interrupt is a type of interrupt that establishes a priority over the many sources to determine which condition is to be serviced
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