The CPU Flashcards
What are the four main units that make up a computer?
CPUI
Main memory
I/O
System interconnection
CPU controls the [o] of the computer and [p] its [d] processing functions.
operation
processing
data
Main memory [s] [d]
stores
data
I/O [m] [d] between the computer and its [e][e]
moves
data
external
environment
System interconnection: a [m] that provides for [c] among [c], [m] and [i]
mechanism communication cpu main memory I/O
The major structural components of the CPU are the [c], [a], [r] and [ci]
control unit
arithemtic logical unit
registers
cpu interconnection
The control unit [c] the operation of the [c]
controls
cpu
ALU [p] the computer’s [d][p]
performs
data processing
Registers provide [s] [i] to the CPU
storage
internal
CPU interconnection provide [co] among the [c],[a] and [r]
communication
control unit
ALU
registers
The Memory Buffer register [c] the [w] to be [s] in [m] or is used to [r] a [w] from [m]
contains word stored memory read word memory
The Memory Address register [s] the [a] in [m] of the [w] to be [w] or [r] from the [m]
specifies address memory word written read Memory Buffer Register
The Instruction Register contains the [e] [o] [i] currently being [e]
eight bit
opcode
instruction
executed
The Program Counter contains the [a] of the [n] [i] to be [f] from [m]
address next instruction fetched memory
During the [f][c] the [o] of the [n][i] is loaded into the [i] and the [a] portion is loaded into the [m]. Once the [o] is in the [i] the [e] is performed. [c] circuitry interpets the [o] and [e] the [i] by sending out the appropriate [c] signals to cause [d] to be [m] or an operation performed by the [a]
fetch cycle opcode next instruction IR address Memory Address Register opcode instruction register execute cycle control opcode executes instruction control data moved ALU
