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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.
Hello everybody I have a project that is a bingo board run by laser pointers, light sensors, and leds. Basically I''m creating a 5 by 5 grid (bingo board) in which each row and col
What is the role of MAR and MDR? The MAR (memory address register) is used to hold the address of the location to or from which data are to be transferred and the MDR(memory d
If for a short period of time circuits goes to some dissimilar logic level then it is assumed to have then it is known as static hazard e.g. If the final logic value of output of a
Q. Show Packing and Unpacking Data? Packing and Unpacking Data pvm_packs - Pack active message buffer with arrays of prescribed data type: int info = pvm_pac
An HTML tag is a syntactical construct in the HTML language that abbreviates particular instructions to be implemented when the HTML script is loaded into a Web browser. It is like
Q. What is Shared Memory Programming? We know all processors share a common memory in shared memory model. Every processor can be assigned a separate portion of program stored
A desirable choice for the partitioning element in quick sort is First element of the list.
How do you save data in BDC tables? The data in BDC tables is saved by using the field name 'BDC_OKCODE' and field value of '/11'.
In floating point numbers when so you say that an overflow or underflow has occurred? Ans: A) In single precision numbers when an exponent is less than +127 then we say that
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