94
All
and more about Sharp PC
-1
500 at http:/lwww.PC-1500.info
4-2-4. PC-1500 system memory map
CD
In t
he
MEO
area
is
contained such
as
th
e syst
em
pro
gr
am
and
user
RAM
area
and the
MEI is used for such as 1/ 0 port.
M
emory
bank
is
assigned by PY
and
PV for the
MEO
area
of8000H thru
BFFFH,
and
PU
and
PU
are
used
to
assign the
PVareaof8000H
th
ru
9FF
FH
.
Addr
ess
OOOOH
t
hru
7FFFH
is used
for
the user
area
and
8000 H
thru
FFFFH
for the system
area.
The
system
area
is used
by
the mnemonic programming system
by
which the
CPU
, If 0
PC
, etc.
are
controlled,
and
the user
ar
ea
is
used to store the program written in
BASIC, mnemonic programming
lang
u
ag
e,
and
data
.
With the
PC
-1500,
MEO
m
emo
ry
area4000H
thru
47F
FH
an
d 7600H thru
7BFFH
are
used for the user m
emory
and
COOOH
th
ru
FFFFH
for the system program.
When
t
he
CE
-
150
or
CE
-
158
is
connec
te
d,
th
e
system
program
, 1{0
po
rt
,
and
RAM
arc arranged
as
shown in the n
ex
t pa
ge
.
0 Upon power
on
to
the
PC
-1
500
, initialization starts for peripheral units accor
ding
to
the system program residing in t
he
system a rea.
and
the user area
ROM
and
RAM
are
che
ck
ed,
then it becomes ready for a key entry.
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not sell this PDF !! !
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