My OperaA+ Exam Cram 2 Memory
Sunday, April 8, 2012 4:20:04 AM
Memory is just a temporary place to shop information till the CPU can get to it. This specifics can be system directions, information, or both. A typical instruction might be a request to shop a number or an event somewhere. One more may well be to retrieve that facts from a specific placean address. Volatile memory can only hold specifics when a regular electrical present is present. Nonvolatile memory can hold facts without any electrical existing.
CAUTION
Volatile, from the Latin "to fly," indicates that facts "flies away" when there's no electricity to keep it in location. Tv reporters regularly refer to an explosive situation as a volatile situation, meaning that it could change at any second. Nonvolatile memory, simply because it's not volatile, stays the exact same devoid of any need to have for electricity.
Conceptual Overview
Memory is fairly simple and easy to understand, once you've grasped the basic concepts. In a nutshell, a CPU moves bits of information into registers (storage locations inside a chip). Following it's dealt with these data bits to its satisfaction, the CPU works together with a memory controller to move the results out to memory cells (storage locations on a memory chip). Both registers and memory cells have memory addresses, and every time a little of information goes somewhere, it crosses a bus of some type. That is it! Now go pass the exam.
All correct, so it really is a bit, so to speak, way more difficult than that. Most memory began as dynamic random access memory (DRAM), as well as the primary changes have been to either speed up the memory to match the CPU, or to speed up the CPU to match the memory. For probably the most component, the history of memory development revolves about synchronizing these two subsystems.
NOTE
When we refer to speeding up memory, this generally signifies rising either the actual speed in the chips or rising the clock speed of linked buses.
Memory involves quite a few simple ideas, the first of which can be a grid or matrix. Due to this, we're going to place Table 3.1 to a slightly distinctive use, producing it a kind of "mind map." For those who can see the way the overall concepts break down on a grid, then maybe they'll be less complicated to keep in mind.
NOTE
A matrix is nothing a lot more 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 ideal (horizontally) have an X coordinate. Cells going up and down (vertically) have a Y coordinate. The direction of rows or columns is called the axis. Combining both the X and Y coordinates provides us an address within the grid, like a cell address in a spreadsheet.
Table three.1 Mind map of standard 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
Kinds 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
Card Modules
mcsa, mcts 70-680, microsoft mcse
CAUTION
Volatile, from the Latin "to fly," indicates that facts "flies away" when there's no electricity to keep it in location. Tv reporters regularly refer to an explosive situation as a volatile situation, meaning that it could change at any second. Nonvolatile memory, simply because it's not volatile, stays the exact same devoid of any need to have for electricity.
Conceptual Overview
Memory is fairly simple and easy to understand, once you've grasped the basic concepts. In a nutshell, a CPU moves bits of information into registers (storage locations inside a chip). Following it's dealt with these data bits to its satisfaction, the CPU works together with a memory controller to move the results out to memory cells (storage locations on a memory chip). Both registers and memory cells have memory addresses, and every time a little of information goes somewhere, it crosses a bus of some type. That is it! Now go pass the exam.
All correct, so it really is a bit, so to speak, way more difficult than that. Most memory began as dynamic random access memory (DRAM), as well as the primary changes have been to either speed up the memory to match the CPU, or to speed up the CPU to match the memory. For probably the most component, the history of memory development revolves about synchronizing these two subsystems.
NOTE
When we refer to speeding up memory, this generally signifies rising either the actual speed in the chips or rising the clock speed of linked buses.
Memory involves quite a few simple ideas, the first of which can be a grid or matrix. Due to this, we're going to place Table 3.1 to a slightly distinctive use, producing it a kind of "mind map." For those who can see the way the overall concepts break down on a grid, then maybe they'll be less complicated to keep in mind.
NOTE
A matrix is nothing a lot more 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 ideal (horizontally) have an X coordinate. Cells going up and down (vertically) have a Y coordinate. The direction of rows or columns is called the axis. Combining both the X and Y coordinates provides us an address within the grid, like a cell address in a spreadsheet.
Table three.1 Mind map of standard 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
Kinds 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
Card Modules
mcsa, mcts 70-680, microsoft mcse
