My OperaA+ Exam Cram 2 Memory
Sunday, April 8, 2012 3:56:03 AM
Memory controller
Read-only memory (ROM) and erasable programmable ROM (EPROM)
Capacitor
Bus
RAM, DRAM, SRAM, SDRAM, VRAM, RDRAM
DIP, SIMM, DIMM, RIMM
Concepts you will ought to master:
Volatile versus nonvolatile memory
Megahertz (MHz) and nanoseconds (ns.)
Memory address
Synchronization to clock cycle (clock tick)
Memory module versus memory chip
Odd and even parity checking
Computer systems use several several microchips and processors, with perhaps probably the most familiar being the CPU and the most important memorywhat individuals generally refer to because the computer's RAM. Memory is just a temporary place to shop information and facts till the CPU can get to it. This knowledge can be program directions, information, or each. A typical instruction may be a request to retailer a number or an event someplace. Yet another may possibly be to retrieve that knowledge from a specific placean address. Volatile memory can only hold knowledge when a regular electrical current is present. Nonvolatile memory can hold data with out any electrical present.
CAUTION
Volatile, from the Latin "to fly," means that specifics "flies away" when there's no electricity to help keep it in place. Tv reporters typically refer to an explosive situation as a volatile scenario, meaning that it could adjust at any second. Nonvolatile memory, simply because it's not volatile, stays the identical without having any require for electricity.
Conceptual Overview
Memory is pretty uncomplicated to understand, as soon as you have grasped the basic concepts. In a nutshell, a CPU moves bits of information into registers (storage locations inside a chip). Soon after it's dealt with these data bits to its satisfaction, the CPU operates together with a memory controller to move the results out to memory cells (storage places on a memory chip). Each registers and memory cells have memory addresses, and every time a bit of data goes someplace, it crosses a bus of some type. That is it! Now go pass the exam.
All proper, so it really is a little, so to speak, way more complicated than that. Most memory began as dynamic random access memory (DRAM), and the principal alterations have already been to either speed up the memory to match the CPU, or to speed up the CPU to match the memory. For the most component, the history of memory development revolves around synchronizing these two subsystems.
Due to this, we're going to put Table 3.1 to a slightly completely different use, making it a sort of "mind map." When you can see the way the general ideas break down on a grid, then maybe they will be simpler to remember.
NOTE
A matrix is absolutely nothing extra than an arrangement of columns and rows, like a spreadsheet or an Etch-a-Sketch. Columns go across the page, and rows go down the side. Cells going left to appropriate (horizontally) have an X coordinate. Cells going up and down (vertically) possess a Y coordinate. The direction of rows or columns is known as the axis. Combining each the X and Y coordinates offers us an address in the grid, like a cell address inside a spreadsheet.
Table three.1 Mind map of basic memory ideas.
Data Storage C Nonvolatile
Disks Temporary swap files
ROM C Nonvolatile BIOS
Programmable ROM CMOS C volatile (trickle charge)
Flash BIOS C Nonvolatile
RAM C Volatile
Types of RAM
Varieties of Packaging
Primary Memory
DRAM
DIP
SRAM
SIMM
SDRAM
DIMM
RDRAM
RIMM
VRAM
(DDR SDRAM)
Cache Memory
L-1 and L-2
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Read-only memory (ROM) and erasable programmable ROM (EPROM)
Capacitor
Bus
RAM, DRAM, SRAM, SDRAM, VRAM, RDRAM
DIP, SIMM, DIMM, RIMM
Concepts you will ought to master:
Volatile versus nonvolatile memory
Megahertz (MHz) and nanoseconds (ns.)
Memory address
Synchronization to clock cycle (clock tick)
Memory module versus memory chip
Odd and even parity checking
Computer systems use several several microchips and processors, with perhaps probably the most familiar being the CPU and the most important memorywhat individuals generally refer to because the computer's RAM. Memory is just a temporary place to shop information and facts till the CPU can get to it. This knowledge can be program directions, information, or each. A typical instruction may be a request to retailer a number or an event someplace. Yet another may possibly be to retrieve that knowledge from a specific placean address. Volatile memory can only hold knowledge when a regular electrical current is present. Nonvolatile memory can hold data with out any electrical present.
CAUTION
Volatile, from the Latin "to fly," means that specifics "flies away" when there's no electricity to help keep it in place. Tv reporters typically refer to an explosive situation as a volatile scenario, meaning that it could adjust at any second. Nonvolatile memory, simply because it's not volatile, stays the identical without having any require for electricity.
Conceptual Overview
Memory is pretty uncomplicated to understand, as soon as you have grasped the basic concepts. In a nutshell, a CPU moves bits of information into registers (storage locations inside a chip). Soon after it's dealt with these data bits to its satisfaction, the CPU operates together with a memory controller to move the results out to memory cells (storage places on a memory chip). Each registers and memory cells have memory addresses, and every time a bit of data goes someplace, it crosses a bus of some type. That is it! Now go pass the exam.
All proper, so it really is a little, so to speak, way more complicated than that. Most memory began as dynamic random access memory (DRAM), and the principal alterations have already been to either speed up the memory to match the CPU, or to speed up the CPU to match the memory. For the most component, the history of memory development revolves around synchronizing these two subsystems.
Due to this, we're going to put Table 3.1 to a slightly completely different use, making it a sort of "mind map." When you can see the way the general ideas break down on a grid, then maybe they will be simpler to remember.
NOTE
A matrix is absolutely nothing extra than an arrangement of columns and rows, like a spreadsheet or an Etch-a-Sketch. Columns go across the page, and rows go down the side. Cells going left to appropriate (horizontally) have an X coordinate. Cells going up and down (vertically) possess a Y coordinate. The direction of rows or columns is known as the axis. Combining each the X and Y coordinates offers us an address in the grid, like a cell address inside a spreadsheet.
Table three.1 Mind map of basic memory ideas.
Data Storage C Nonvolatile
Disks Temporary swap files
ROM C Nonvolatile BIOS
Programmable ROM CMOS C volatile (trickle charge)
Flash BIOS C Nonvolatile
RAM C Volatile
Types of RAM
Varieties of Packaging
Primary Memory
DRAM
DIP
SRAM
SIMM
SDRAM
DIMM
RDRAM
RIMM
VRAM
(DDR SDRAM)
Cache Memory
L-1 and L-2
mcitp enterprise administrator, mcse certification, mcts windows 7
