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30 Cards in this Set
- Front
- Back
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CPU
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The heart of the Microprocessor is the Central Processing Unit (CPU). The CPU controls nearly all functions of the PC.
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External Data Bus
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Wires on the motherboard used by the CPU to communicate with peripherals and ROM.
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Address Bus
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Wires on the motherboard used by the CPU to communicate and access memory through the Memory Controller Chip (MCC). How much memory a CPU can access depends on how many wires are in the address bus.
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Clock Speed
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The speed at which a CPU can perform calculations and access peripherals or memory. This is controlled by the oscillating System Crystal located on the motherboard.
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Real Mode
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The mode of memory access used by the CPU in DOS. CPU can only access 1MB of memory and can only run one program at a time.
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Protected Mode
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The mode of memory access used by the CPU to address more than 1MB of memory and run more than one program at a time by ?protecting? the part of memory each program is running in from use by another program.
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386 Enhanced Mode
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Same as protected mode, but added the enhanced features of Virtual Memory and Virtual 8086.
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Virtual Memory
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When CPU uses a portions of a hard drive storage device as memory. Appears just like regular memory to the operating system.
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Math Coprocessor
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A processor other than the CPU that is used to perform high level math functions.
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Internal Cache
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On board RAM built into the CPU. This allows the CPU to store commands internally and execute them when it has time. Also called Level one (L1) cache.
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External Cache
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as L1 cache, only it is a special RAM chip that sits on the motherboard.
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80286
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Protected Mode, Addressed more than 1MB of memory (16MB).
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80386DX/SX/SL
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Virtual Memory, Virtual 8086, Internal Cache, 386 Protected Mode.
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486
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Built in Math Coprocessor & L1 Cache on same chip.
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Pentium
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Dual Pipelining.
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CPU
|
The heart of the Microprocessor is the Central Processing Unit (CPU). The CPU controls nearly all functions of the PC.
|
|
|
External Data Bus
|
Wires on the motherboard used by the CPU to communicate with peripherals and ROM.
|
|
|
Address Bus
|
Wires on the motherboard used by the CPU to communicate and access memory through the Memory Controller Chip (MCC). How much memory a CPU can access depends on how many wires are in the address bus.
|
|
|
Clock Speed
|
The speed at which a CPU can perform calculations and access peripherals or memory. This is controlled by the oscillating System Crystal located on the motherboard.
|
|
|
Real Mode
|
The mode of memory access used by the CPU in DOS. CPU can only access 1MB of memory and can only run one program at a time.
|
|
|
Protected Mode
|
The mode of memory access used by the CPU to address more than 1MB of memory and run more than one program at a time by ?protecting? the part of memory each program is running in from use by another program.
|
|
|
386 Enhanced Mode
|
Same as protected mode, but added the enhanced features of Virtual Memory and Virtual 8086.
|
|
|
Virtual Memory
|
When CPU uses a portions of a hard drive storage device as memory. Appears just like regular memory to the operating system.
|
|
|
Math Coprocessor
|
A processor other than the CPU that is used to perform high level math functions.
|
|
|
Internal Cache
|
On board RAM built into the CPU. This allows the CPU to store commands internally and execute them when it has time. Also called Level one (L1) cache.
|
|
|
External Cache
|
as L1 cache, only it is a special RAM chip that sits on the motherboard.
|
|
|
80286
|
Protected Mode, Addressed more than 1MB of memory (16MB).
|
|
|
80386DX/SX/SL
|
Virtual Memory, Virtual 8086, Internal Cache, 386 Protected Mode.
|
|
|
486
|
Built in Math Coprocessor & L1 Cache on same chip.
|
|
|
Pentium
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Dual Pipelining.
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