11753932
Description
Mind Map by emily parr, updated more than 1 year ago
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Created by emily parr
over 6 years ago
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1.2 MEMORY
- ROM
- READ ONLY MEMORY
- ROM is memory that can only be written
to once you can only change it when you
access bios
- BIOS:basic input output system
- not part of the CPU
- not part of the CPU
- BIOS:basic input output system
- ROM is memory that can only be written
to once you can only change it when you
access bios
- READ ONLY MEMORY
- VIRTUAL MEMORY
- It allows us to run more applications on the
system than we have enough physical
memory to support.
- Virtual memory is a memory
management capability of an
OS that uses hardware and
software to allow a computer
to compensate fro physical
memory shortages by
temporarily transferring data
from ran to disk storage
- Physical storage is several typesof data storage
that exists in most computer systems
- Virtual memory is a memory
management capability of an
OS that uses hardware and
software to allow a computer
to compensate fro physical
memory shortages by
temporarily transferring data
from ran to disk storage
- It allows us to run more applications on the
system than we have enough physical
memory to support.
- RAM
- RANDOM ACCESS MEMORY
- a type of computer
memory that can be
accessed randomly
- that is any byte of memory
can be accessed without
touching the preceding bytes
- RAM stores your data and
programs while you are
working on them
- RAM stores your data and
programs while you are
working on them
- ram is volatile
- a type of computer
memory that can be
accessed randomly
- RANDOM ACCESS MEMORY
- CACHE
- cache is a small part of the memory that's
part of the CPU than RAM
- The CPU automatically checks cache for
instructions before the requesting data
from RAM
- This saves fetching the instructions and data
repeatedly from RAM.
- The more cache there is,the more data
can be stored closer to the CPU.
- cache is graded as level 1 level 2 and level 3
- l1:is usually part of the CPU chip itself and is
both the smallest and the fastest to access.its
size is often restricted to between 8KB and
64KB
- L2 and L3 caches are bigger than L1.they are
extra caches built between the CPU and the
RAM. Sometimes L2 is built into the CPU with
L1.L2 and L3 caches take slightly longer yo
access than l.1. the more l2 and l3 memory
available,the faster a computer can run
- l1:is usually part of the CPU chip itself and is
both the smallest and the fastest to access.its
size is often restricted to between 8KB and
64KB
- Not a lot of physical space s allocated for
cache. There is more space for RAM'which is
usually larger and less expensive
- cache is graded as level 1 level 2 and level 3
- This saves fetching the instructions and data
repeatedly from RAM.
- The CPU automatically checks cache for
instructions before the requesting data
from RAM
- cache is a small part of the memory that's
part of the CPU than RAM
- SOLID STATE
- all-electronic storage device that is an
alternative to a hard disk
- its including mobile
devices,ipods,cameras,laptops and
desktops computers.
- solid state are faster than
hard disks because there is
zero latency
- ZERO LATENCY- no read/write head to move.
- ZERO LATENCY- no read/write head to move.
- solid state are faster than
hard disks because there is
zero latency
- its including mobile
devices,ipods,cameras,laptops and
desktops computers.
- all-electronic storage device that is an
alternative to a hard disk
- FLASH
- flash memory is non
voliate
- memory chip used for storage.
- EEPROM-electrically
erasable
programmable
read-only memory.
- EEPROM-electrically
erasable
programmable
read-only memory.
- memory chip used for storage.
- flash memory is non
voliate
- REGISTER
- a processor register (CPU register) is
one of the small set data holding
places that are a part of the computer
proccessorn
- a register may hold an instruction,a
storage address,or any kind of data.
- some instructions specify
registers as part of the
instruction
- some instructions specify
registers as part of the
instruction
- (such as a bit sequence
or individual characters)
- a register may hold an instruction,a
storage address,or any kind of data.
- a processor register (CPU register) is
one of the small set data holding
places that are a part of the computer
proccessorn
- role of the power on self-test (POST) in the boot
sequence.
- A power on the self test is the first
stop of the boot sequence.
- A power on self test checks that basic system devices are present
and working properly.
- A power on self test checks that basic system devices are present
and working properly.
- A power on the self test is the first
stop of the boot sequence.
- KEYWORDS
- CPU- Central Processing Unit
- RAM- Random Access Memory
- VOLATILE- gets emptied when
power is turned off
- ROM- read only memory
- FIRMWARE- permanent
software programmed
into ROM
- NON VOLATILE- doesn't loose the
data when the device has turned
off
- BIOS-basic input/output
system contains
programs to load the
hardware
- DISK THRASHING-when a
computers virtual memory
subsystem is in a constant
state of paging
- CPU- Central Processing Unit
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