Operator`s manual

),
GETTING
STARTED
ALLOCATING
MEMORY
The very
lirst.decision
you
must
make when you
sii
down to write your
source
program
involves
the
allocation
ofmcDlory
spac€.
All p,
ogram".
,lgdrdlpss ,,f
l"ngu"ue.
occrrpl me
,ory
\p4ce.
rhe(.ompurerha"
a rrmrrc(l
drnounl ot
,npmory
and
mu5t manr.'F
iti
merno|v
.dr.full\
. alloLJlmu
p " r t i o n "
o f m . r , r o l J
r o r p r o g r d m . d r r a . d r . p i r y " f , a , " . r , , d . o r o l t .
r r . , . ; , , i i
donr
automdlRatly
in BASIC.
c,,
rhc
BASIC
u".r nced nor
worcv
about $ hele
in
nremury
lri.
p'ogrJm
and dara
drc,tored.
Su.h is nor quire rie
crsc rvirh
rhe
As.emblpr
LdIor
c"r'rridge.
y,,u
hare
Jhe powpr
ro
ptlrlF
vour
L,ruerams
rnJ whei
e in me
ory, har you
dcn.e.
u irh
rhF
po-",
,oln.sr6.,.sp;n,i"b,tirl.
to
allocatc menor.v
iviselv,
rhe araRr
conputer
syU."
*""
a* -"--"
tbr its
own internat
Deeds. The
an,ounr rr
urFs,lepcnds
un $hprlrcr
o. nor DOr
is loJIed
ir,ro RA]\1.
ln anv
F v e , , r .
' h c
A r " c n r b F r
f , d i r o . , d r r r i d g F $ r
a u r o m a r i , J t y p l a , e v o u r
s , u r c c
p r J _
g ' " m
i n r o
' h e
c h u n k
o f m c r n o , v
, r J
i n g w i r h
r h e
f i r . j i r . . ; " m o r "
t , . . r | i o n .
As.you
typ€ in
more source
code,
the memorlr
allocated
io storing
your
source
.odc
'.a
ed r h-
.
Ldir TF\r
Bufrerj
,
gro$
". tfyou
dcl"re
tinFs
or
.o;r
(
F ,
.,de,
rh.
c d i r r p \ r
b u f T ( r . l r r i n k . .
y o u , r n
v i s u a t i z F
r t , p m F m o r )
r o , , r r o n \ v i r h
r h i "
figure,
which is
called
a memofy
map:
DOS
os
180
EditToxt
Bufter
Empty Display
BAU
EigtJre
2. Mernorynap
without
rtse
of LOMEN.
'I
he e l i i r
tr xr huti.r
ilwry. gros.
lo\vrrd"
lhp r.isht, I
o r h e
..emo
ar
pa.
The
lpfr riJe
or rhe
eJir r F r r
Lr
rfIpr
i. f i r c a
in
pta, .
on.e vou
lr,u.r
.nr.riie
Your pfobleD,
is r,, dcr.rmine
wl)erF
ro,rore
Jhc
obip, rLod,
Dr,,(lu(.ed bv rhe
A."embler.
lfyou
nur
rhF,,hjecr
codF i n l o
rhF rcgio'nq
m.rk;d os
RAM,
DOS
R A M .
o r d . . p l a v
R A M .
) o u
$ i l . p f o l r l l '
J
c , r r r " .
r h . c o m p u r e r
r . , r " " h , , n d a t l
y o J r . l y p i n g
\ \
i l l b e l o " l .
l f y , , u p u r
i r i n r o
r h F
p t d c ,
c r
" , t
r h . e d i r
r p \ r b u r t ; r ,
'hc
obiccr
,
o,le
will
ovcfwri
e r h e s , , u r
r'e , o d e . ,:
sin{ m o , c .hdo!.
.i
Le unlv
s i r i p l d . e
r u
t , , ) o l r . o b j e . r
,
u . t c i s i n r h c . ? m p , v
r , ) e ; , , , y . . i r . , .