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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.
What are stacks? A stack is an abstract data type in which items are additional to and removed only from one end known as TOP. For example, consider the pile of papers on you
advantages of file system?
Static memories Circuits capable of receiving their state as long as power is applied volatile Static RAM(SRAM)
Give the formula for the average access time experienced by the processor in a system with 2 levels of caches. Ans: Formula is for the average access time experienced by the pr
1. Enter your "E-mail address" and "Real Name" (or whatever name you need to call yourself) in the spaces given, then select the "Create Account" button. 2. Within moments, you
What is Difference between write back and write through cache? A caching method wherein modifications to data into the cache aren't copied to the cache source till absolutely n
for calculating simple interest
Q. Find simplified function F and implement that function using only NAND gates. 1. F(A,B,C) = (A+B) (A'+B+C') (A'+B'+C') 2. F (A,B,C,D) = A'B'C'+B'CD'+A'BCD'+AB'C' 3.
Q. Execute a reduce operation over members of specified group? int info = pvm_reduce( void (*func)(), void *data, int count, int datatype, int msgtag, char *group, int root
Algorithm to insert a key in B-tree is as follows: 1. First search is completed for the place where the new record must be put. As the keys are inserted, they are sorted into
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