The kernel of a computer will have full access to the system's memory and is required to allow any processes to access this memory when needed. To do this, the kernel carries out virtual addressing. Within virtual addressing it is possible to make a given physical address to appear as a virtual address, i.e. Another address. These virtual address spaces are different for different processes.
The memory that is processed to access one virtual address may be different to the memory that a process accesses at the same address. These spaces allow ever program on the computer to run as if it is the only one and stops these applications from crashing each other. Virtual addressing can also be used to create virtual partitions of memory in disjointed areas. One of these areas will be reserved for the kernel and other for applications.
Device drivers, processed by the kernel, are used in order to control the peripherals that are connected to the computer. These peripherals need to be accessed by processes to perform useful functions. A list of the available devices is maintained by a kernel and is either known in advance, configured by the user or detected by the operating system at run time.
Device management is a very operating system specific topic and each of the drivers is handled differently by the different kinds of kernel design. The thing that they all have in common is that the kernel is required to provide the input output to allow drivers to access their devices.
These two different facilities within the kernel of a computer are used alongside process management and system calls to help the kernel carry out its role within the system.
A memory management unit (MMU) is a small device between CPU and RAM recalculating the actual memory address, for example to provide an abstraction of virtual memory or other tasks.
What is the difference between a regular memory card and an Ultra Memory card
what is the difference between the memory store model and the working memory model?
1. Processor management 2. Memory management 3. Device management 4. File management
The main difference is in how the data structures are stored. In a union, all of the elements are stored in one location. A structure stores each of its elements in a separate memory location.
1. User Interface 2. Memory Management 3. Processor Management 4. Device Management 5. File Management
-Memory Management -Process Management -Disk and File System Management -Networking -Security -Graphical User Interface (GUI) -Device Driver Management
it is a device to transfer the data directly between io device and memory without through the cpu so it performs a high-speed data transfer between memory and io device
Marketing.
CD = Compact Disk ROM = Read Only Memory Together CD-ROM means a compact disc made into a read only memory device. Rewritable cd's are not cd-roms as they are memory devices that can be rewrote to.
Memory is microchip; address are processor board slots
difference between register and memory location