11753739
Description
Mind Map by Shauna Smith, updated more than 1 year ago
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Created by Shauna Smith
about 8 years ago
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1.2 Memory
- MAR (MEMORY ADDRESS REGISTER)
- Stores the address from which data will be fetched to the
CPU OR the address top which data will be sent and
stored.
- Found in the CPU and
goes to either RAM or
Cache
- Stores the address from which data will be fetched to the
CPU OR the address top which data will be sent and
stored.
- MDR (MEMORY DATA REGISTER)
- The control unit that contains the data to be stored
in the computers storage.
- Can also contain data after a
fetch from the computers
storage
- The difference in MAR and MDR is that MAR is only
temporary storage and MDR is read only.
- The control unit that contains the data to be stored
in the computers storage.
- ACCUMULATOR
- Where intermediate arithmetic logic results are stored
- Where intermediate arithmetic logic results are stored
- SOLID STATE
- Solid-state storage is a type of computer storage media
made from silicon microchips. SSS stores data electronically
instead of magnetically, as spinning hard disk drives or
magnetic oxide tape do.
- Solid-state storage is a type of computer storage media
made from silicon microchips. SSS stores data electronically
instead of magnetically, as spinning hard disk drives or
magnetic oxide tape do.
- CACHE
- Cache is a small amount of memory which is a part of
the CPU - closer to the CPU than RAM. It is used to
temporarily hold instructions and data that the CPU is
likely to reuse.
- Cache is a small amount of memory which is a part of
the CPU - closer to the CPU than RAM. It is used to
temporarily hold instructions and data that the CPU is
likely to reuse.
- FLASH MEMORY
- A kind of memory that retains data
in the absence of a power supply.
- A kind of memory that retains data
in the absence of a power supply.
- VIRTUAL MEMORY
- memory that appears to exist as main storage although
most of it is supported by data held in secondary
storage, transfer between the two being made
automatically as required.
- memory that appears to exist as main storage although
most of it is supported by data held in secondary
storage, transfer between the two being made
automatically as required.
- ROM (READ ONLY MEMORY)
- ROM is memory that cannot be changed by a program
or user. ROM retains its memory even after the
computer is turned off. For example, ROM stores the
instructions for the computer to start up when it is
turned on again..
- ROM is memory that cannot be changed by a program
or user. ROM retains its memory even after the
computer is turned off. For example, ROM stores the
instructions for the computer to start up when it is
turned on again..
- REGISTERS
- A processor register (CPU register) is one of a small set of data holding
places that are part of the computer processor. A register may hold an
instruction, a storage address, or any kind of data (such as a bit sequence
or individual characters). Some instructions specify registers as part of the
instruction.
- A processor register (CPU register) is one of a small set of data holding
places that are part of the computer processor. A register may hold an
instruction, a storage address, or any kind of data (such as a bit sequence
or individual characters). Some instructions specify registers as part of the
instruction.
- RAM
- RAM is a fast temporary type of memory in which programs,
applications and data are stored. If a computer loses power, all
data stored in its RAM is lost.
- RAM is a fast temporary type of memory in which programs,
applications and data are stored. If a computer loses power, all
data stored in its RAM is lost.
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