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Sharp PC-1500A Service Manual page 3

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All
and more about Sharp PC-1500 at http:/lwww.PC-1500.info
1. General
Since
the
PC 15001.
is
a
revised
version
of the
PC 1500
with
more
memory
capacity. its
functions
are almost
identical
to the PC-1500 except
fo
r
the
memory
size.
This manual therefore
deals
with
the
items
that
differ fro
m
the
PC·
1500.
For
other
functions,
refer to
the
PC·
1500
Service
Manual.
2. Main differences
2-1
. Change
in RAM
capacity
PC·
1500
PC·1
500A
User
RAM
:
HM·6116
1
pc
4
pcs
System RAM: TC·551
4P
2 PCS
0
2·2. Change
in
specificat ion
PC-1500
PC1500A
System
ROM
16
K
Byte$
Standard
RAM
capacity
3.5
K Bytes
8.5
K
Byte$
System
area
0 .9
K
Bytes
Input buffer
80
Bytes
Stack
196 Bytes
UGor oroo
2 .6
K
But.,
7
.n K Ryte•
Fixed
memory area
(A
-
Z,
AS~
ZS)
624
Bytes
Basic
program
data area
1850
Bytes
5946
Bytes
Reserve area
188 Bytes
Machine langui:ge
area
~-
-
1024
Byte$
2-3. Change
in 40
pin
module
connector
signal names
----
PC·1500
PC1500A
Sl
-j.
S3
Signa
l
52
,_
S4
name
S3
!--
S5
3. Program
and
peripheral compatibility
Programi
developed
for the
PC-1500
can .,11
bo
u~cd
for tho
PC-15001\. 1\11
PC1500
optionc can
also be used
for
the
PC-1500A.
Do not
sale
this PDF !!!

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