Summary
Summary All of the GCSE Computer Science OCR
- Course
- Institution
Notes on all of the GCSE OCR Computer Science specification J277 from 2020
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TOPTC1-1
ardoore
CPU
ponents
of
neuLnan
or
Funckion
archite
unchon
TpanStnae
Liše
ctre
brns
Tne
CPU
arctecture dsebes
ALU(Anithmalic lgicad Conputer
a
cyde
decocLaxecwte
logyt
chitecture
ha
wit)
n
Or
leat Sinle placcd
conponant stores
lostt cumpates
ro
prom
n
Ha
A
CU(ontd data
are
te
cpu othar wmputet (ie winwn
wne
eaite)
Tha
Ae
or
wnt)
6PU
Some
nemupy
ple
n
Sre
Cache
•T
Citui
Mohecboard pvnted
Ihe
•Data
cloes
na
canept
memoy
deign
access
fundamentad
Sture
Used
w
Ihis
stenws
cUhnetd
to
to
modom onpuber
e
behnd
cur
M
6ccessed
unshuchum data
egsteo
Sy
actte
all
h
(Memoy
memny
s
to
he
RAM
comptuc
shure
busses
to
he
Stu2 nstnct Sustr
ot
bo
Vse
the
ht
te
bruyht from sent mory
RAM)
Frum
cparntiny dicéro
Mr
(un cdato
to
cdus(
men
A
(Memoay
the
CPU
b
sta
one
t
Th
eg
loSt
the
dets
w
nstuctim
AM
Stores the
ben
st
Passes Koiins
ha
has
thaty
memy
data
mewn
of
chew
b
Mene
CIR
(bidire ctionod
m
RAM
Access
to
Rendon clata
fer
Tha
CPU
s
uctu
data
Passes
oleay
vota-a. StoN
ed
/drie
ia
disk
Had (Accenuloto)
Non
l
data (he cuuputer (bidiecjonal
contrd
on
R
CPU
fo
es
lurite)
sigits
contn
Acc
The
-Pass
(eal
nstu(ti
PC
Counter) next
(Progon
the
cotro
thet
boat
aret
Graphic (ard
A
tetch-Deuoda
eica
-Eecute
the cmtr
Cuce?
poe
pron
to
Pouwer
To
hTnsfoms
Whal
the
suppy
Components
P
Spphy
RAM
The
MAR
flcuy thhyh
i
elactict Cunent 0ddeSS
P
the cpied
thefC
aicess
ko
the
MAR
The
s
f
Fetch
instrwciun,k ACC
Cedes
ates anol
Can unitlo
CUmput COnto
rha
se
it
(voiteye)
he
so
MOR Dats bus
The
stotted
whiCh ccn
Aei plaed
to
Card then
Sownd Ünstruch,
be
The
un
MDR
on
the
o
nstructih
s plaad
C1R
ne
it
is
tha
PSncremented
firth betreun
(NIC) be. ele
e)
DeCode
rurel wmit
conto
cd
coadhy
hansvwCtiu
1iy
cle
e
5)
y CLR
n the
exeubed placug
nshuct,n
Hnally the
by
r
fir
dato
bo
hg
ce
he
any che
wto
MA&
dot
khe
for
syshmn
Ophcal
mputer
) flcc
thod
alnn
Cube
A
de
coekeod)t
goo
Exe
il
cle
B-ray opri dislcs epeat
proces
el
, CPU Pexormonce
Processor speed (usuay in GHe -Ggehertz)-clocksped9
.4GHe meons that the proasur
eeyseund
Hr me Çe veh- decoce eeute cyds per so nd
Vnuiki -(0re proeSSUYS
cone aVaulodolo
The omtar has wndapardat
þrucessos
hee noependen jprosser
Anwt ot Cache awaulae- (adh memm
Stones neaenthy wed unsbou cksn and data, built nto (s CPO
Provi faster access than RAM
(oada unto he CPU m one
nd date l he
Allo
qui cey
Bus speed
AÇfe cks hos qiy tha
cwmputer
has wn mpact n the speed of a omputer
Bus
Detemines
at Ha Sama bia
Cnm Gne wpratmlú ,
pass)
he bttar the
wiclr d ata bus,
brnsfed at n bina
as mune dcta cun lao
, tmbedded
Sysienc
A computer Systm thaty bult into eneter derico
softwane end tertene e ntegruted Dn a Circuit board
Some Ryonyis
ishn wasner
dgitad clocs
vehicles
.MP3 Player
Disdvcntges
Adontag
Embeddd sstesae r Smallr
than enil purpose computeo ich purpose compters (buk tnay
Imen chece cen ro be)
be made more cnt dont nee
•Embed dedsystems ore cheaped to
prodc then gened purpose sysr emms,uhch (bt ney e ndy needa bo do g
bask)
.Embedded Sy Stems tend to be moe
Dedicaked computer systems
•A dicdicated computer systemn is one that has fiked pupu
Cwything else.
General pupoe systems
Other capters noy
be wded in iffeet soys dipendiny on the tasks that nead to de
be
base wond be
dasctp Ht, Smartph one,laptop ar
A
Frm nternet plg gowmey cnd send
he wsed to nabe spreoduet, doroad music fie
they cam
nemad
A compuker System
dicun
tha with penphal
ncbsle
systems wil
•Computer
(herdr) bhat oue necas5 Gry tomaa tie wytr fundn
recere Uputs, proces th cleta t recibe then
oclu ca cun otput
TE
PROCESS OUTPU1
INpUT
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