All and more about Sharp PC-1500 at http:/lwww.PC-1500.info
1.
Machine language
2
There are
many
program languages f
or
each purpose. PC-1500,
for
ex
amp
le, is
designed to
carry
ou
t both BASIC and machine lan
guag
e.
BASIC is easy to use,
however, execution speed
is
slow.
On
the ot
her
hand, machine language is
diff
i
cult
to un
de
rstand
but
execution speed is fast
Usual
ly
, machine language pr
og
ram
wo
u
ld
be
writt
en with the assemble
language,
wh
ich consists of
mn
e
monic
cod
es, and then the assemble language
will
be
translated
into
machine language.
[EXAMPL
E]
DISPLAY REVERSE
PR
OG
RAM
I. Prepare t
he
program with assemble language consisting of mncmo
ni
c codes.
LD
l UH.
78
H l
r prepare for assig
nm
e
nt
of
the
fi
rst disrlay buffer add
re
ss
.
L
DI
D
EC
L
OA
EA
i
STA
LOP
CPI
BCS
R
TN
UL.4DH
UH
u
FFH
u
06H
UH.
77
11
OEH
advance the address
lake
da
ta
in
the accumulat
or
la
ke
the cornrlement
return data into memory
ma
ke the loop
return to
RASIC
2. Trans
la
te
the above program into
ma
ch
i
ne
language. 1 h
t:
<
•
s~crn
blcr
tran
sl
atcs thc
assem
bl
e language
in
to t
he
machine
la
ng
ua
ge
au
t
om
atical
ly
acco
rd
ing 10 t
he
lis
t.
H nweve
r.
a s
hort
program
ca
n be t ranslatcd manuall
y.
(ha
nd
a
sse
mb
le
)
The abo
ve
program can be 1ransla1cd as
follows
:
68
78
6A
40
FD
62
25
BD
FF
2E
88
06 6C
77
93
Of"
91\
Do
not
sell this PDF
!!!
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