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30 Cards in this Set

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  • Back
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
Dual Pipelining.
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
Dual Pipelining.