Unit02: Computer Architecture Flashcards
CD-ROM
Compact Disk Read-Only Memory
TFT
thin film transistor
MB
Megabyte
GHz
Gigahertz
FSB
front-side bus
SDRAM
Synchronous Dynamic Random Access Memory
XGA
External Graphics Array
SVGA
Super Video Graphics Array
AGP
Advanced Graphics Port
What is memory size of computer ?
RAM
mouse ?
control the cursor
clock
controls the timing of signals in the computer
RAM
holds data read or written to it by the processor
ROM
holds intructions which are needed to start up the computer
cache
provides extrememly fast access for sections of a program and its data
flash memory key
read and writes electronic chips on a card
main causes of a PC not running at its highest
the time it takes to move data in and out of memory
word instead of ‘buffer’
cache
what devices look after cache coherency
cache controller
alternative to ‘write-through cache’ ?
‘write-back’ cache
when ‘write-back’ cache write its content back to main memory
‘dirty’…
before using the space to cache new data.
When data is marked as ‘dirty’ in ‘write-back’ cache ?
Cache entries that have changed are flagged as ‘dirty’ (When data in the cache is changed)
What determines what data is replaced in a disk cache ?
An algorithm
cache hit
the processor is succesful in finding the data in cache
cache controller
the logic circuits used to control the cache process
cache coherency
ensuring that any changes wrtten to main memory are reflected within the cache and vice versa.
wirte-thorugh cache
the process of writing directly to both the cache and main memory at the same time.
write-back cache
the process of writing changes only to the cache and not to main memory unless the cache is used to cache new data.
Line size
the amount of data transfered to the cache at any one time
write-back cache require more inteligent cache controller (TRUE/FALSE)
TRUE
