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A memory address is often displayed in segmentoffset format for example C8005 What number system is used to display this number?
hex
Is it conceivable that some operating system processes might have the entire main memory as their address space?
No, it is impossible. The operating system kernel must remain in memory at all times, including the virtual memory manager, thus no single process can physically occupy every address. Indeed, all unused physical memory is allocated to the virtual memory manager. Processes are allocated addresses within the virtual address space but some of those addresses are reserved for system use only. As such, no process can ever use the entire virtual address space let alone the entire physical address space.
What is random scan display in CRTcomputer?
In random scan display the electron beam is directed only to the part of the screen where the picture is to be drawn. Random Scan monitor draw one picture at a time therefore they are also known as vector display.refersh rate or random scan system depends on the number of times to be displayed. Picture definition is stored in an area of memory called refresh display file.
What are the four major system resources used by computer devices?
The major system resources to consider are the I/O port address, memory addresses, IRQ, and DMA settings.
What is a page map table?
In operating systems that use virtual memory, every process is given the impression that it is working with large, contiguous sections of memory. In reality, each process' memory may be dispersed across different areas of physical memory, or may have been paged out to a backup storage (typically the hard disk). When a process requests access to its memory, it is the responsibility of the operating system to map the virtual address provided by the process to the physical address where that memory is stored. The page table is where the operating system stores its mappings of virtual addresses to physical addresses.
A memory address is often displayed in segmentoffset format for example C8005 What number system is used to display this number?
hex
How do you calculate the virtual address space for a given system?
To calculate the virtual address space for a given system, you need to determine the number of bits used for addressing in the system's memory architecture. The virtual address space is typically 2 raised to the power of the number of bits used for addressing, which gives you the total number of unique memory addresses that can be accessed by the system.
What Sandra module(s) can be used to display information about system memory?
mainboard, memory usage tool
How would you ssh to run xterm on bravo and show the display on the local system?
Use ssh to log into the bravo system. Then, inside the SSH session, export the DISPLAY variable with the IP address and display number of your local system. Then, start up xterm on the bravo system. The results will display on your local system. For this to work, your system must be running in an X windows environment or have an emulator.
Number system used to count memory?
Memory bank.
Suppose that a machine has 48-bit virtual addresses, what are the implications of this address size on memory management and system performance?
With 48-bit virtual addresses, the machine can address up to 256 terabytes of memory. This large address space allows for more efficient memory management, as it can accommodate a greater number of processes and data. However, the increased address size may also lead to higher memory overhead and potential performance issues due to the larger memory footprint. Overall, the implications of a 48-bit address size on memory management and system performance include improved scalability but potential trade-offs in memory efficiency and performance.
What is the difference between memory address and memory addressability?
A memory address is a specific location in a computer's memory where data is stored. Memory addressability refers to the maximum amount of memory that a computer system can access and use. In other words, memory addressability is the range of memory addresses that a computer can access, while a memory address is a specific location within that range.
Function of a MAR and MDR?
The Memory Address Register (MAR) holds the memory address that is currently being accessed or written to in the memory. The Memory Data Register (MDR) holds the data that is being read from or written to the memory at the address stored in the MAR. Together, the MAR and MDR facilitate the communication between the CPU and memory in a computer system.
Explain how virtual address is converted into physical address?
A Microprocessor provides a memory address (within the address space of that micro, which is related to the number of address pins of the micro. For instance 32 pins can generate 4GB of addresses). In a system with DRAM modules, each DRAm chip contributes with only one bit to compose the word. Each bit has its own address, each DRAM chip has its own address within a module and each module has its own address within the memory system. A DRAM chip is composed by N matrices, so there are "matrix address", line address and column address. There are so many addresses and control signals, and the microprocessor knows nothing about them. Thus, the system must contain a memory controller which translates the address provided by the processor (some times called virtual) into fisical memory address. These translations are made by the hardware (only). Another history is the virtual memory, where there is a mapping between the address provided by the processor and the address where the data is stored (part in ram and part on disk). The address space is broken in pages, and a mapping unit (which can use a cache like memory - TLB) mantain information about which page is on the disk and witch is on the RAM. This system is a combination of hardware and operating system. The precise explanation can be found in any operating system book. Sorry by the English.
In paged system Can the logical address space b larger than physical address space?
Yes. This is the fundamental premise of paged or virtual memory - that you can have more logical memory than physical memory.
What is the memory limitation for a 32-bit operating system?
A 32-bit OS can only address up to 4GB of memory.
Is it conceivable that some operating system processes might have the entire main memory as their address space?
No, it is impossible. The operating system kernel must remain in memory at all times, including the virtual memory manager, thus no single process can physically occupy every address. Indeed, all unused physical memory is allocated to the virtual memory manager. Processes are allocated addresses within the virtual address space but some of those addresses are reserved for system use only. As such, no process can ever use the entire virtual address space let alone the entire physical address space.
