Service manual
PC
- I600
Pi
n
Symbol
In/
Out
Actille
F\lnctiOn
N,
.
I .... el
J9
",
eN,
low
In
When
th
e Z·
80
il in
operat
ion, t
he
Z
·
80~l
i'l
n
ou
tpUt
on
thi,l
i
ne
,
121
When
the
LH
·5B03 il in
operltion
,
th
elig
nll
cr
ealed from
the
OPF ,ignll
of
th.
LH·
5803
is
II
nl
on this line.
40
RffiI
eN,
L,w
Refresh signel.
In
T
he
Z·
80
FfI!S'R
signal i, on this
li
n
•.
121
When Ihe LH-5803
is
in
ope
r
etion,
the
, ignal cr
ea
t
ed
fr
om
the
OPF
signal of
the
LH·
5803
i
lll
nl on this
l
i~e.
41
VDD
vee
42
'DE
eN,
High
Thillignel
il
issued
when
the
LH-5803 tri
ll
to
access
··OOH-
·
·OF
H and
8OOOH
-
OF
FFH
of
the
MEl JPK4I. When
thl.lignel
il
ll
nt
OUt
,
one
we
lt
i,"nllO
the
L
H·5803
. In l
erml
of timin
g,
th
e
lignl
l
il
li
nt
with.
hlllf cl
oc
k delay
on
thl
MEl .
ODS
I I I I
~
,
L
M
El
,
..
-
--
LHWAIT
I I
'DE I L
43
eSOD
'
eN,
Low
Z-80
conlro
l
ROM
II
I
IC
I signal.
OOOOH-7F FFH memory space (bank 0).
44
C51
23
<11
0u1
low
In
Z·80
control
ROM
5eleet 5igna
l.
BOOO
H-
BF
FFH
memory
space (bank 6).
121
LH
·
5803
c
ontrol
ROM
$llect
lignll.
COOOH
-
FFFF
H
mem
ory
spece,
45
CS24
eN,
low
Z·
BO
co
ntr
ol ROM seltc:t l ignal.
111
4OQOH-7FFFH
memory
space
ll»nk
3).
121
SOOOH-COOOH
memory
splICe
(bank 4).
One
wlit
JI
In
.lU
d.
..
LH
53
eN,
lo
w
I
Me
mory
letect
'Igna
l.
47
tHS2
' eN, L
ow
Depending
on
t he ltete
of
bit
"6
" of I
/O
3CH,
the
memory space sel
ected
48
=
• C>"
L
,w
diffe
r •.
b6
· 0 b 6 - 1
om
ASOO
H-
AF
F
FH
(bank
01
BOOOH
- B
7FFH
(!>enk 0)
TIm
8OOOH-B7 FFH (bank
0)
ASOOH-FAFFH (blink 0)
=
B800H- BF
FF
H
(blnk
0)
AOOO
H- A7
FF
H
(bank 0 )
LH51
I nd LHS2
.re
pulled
up
inlernelly.
~
oeech
to
be pulled up e
xterna
lly. (pulled
up
Ixtemllly.)
49
RAM3
eN,
High Memory
IIlect
lignel
!loternll
16KB R
AM
).
COOO
H
-FF
F
FH
(bank 0).
SO
RAM2
eM
L.w
Me
mory lelect l
igOl1
(51 :
1.
8000
H
-BFFF
H (bank 0,
bank
1
1.
8000H-BFFFH
(bank 2, bank 3),
51
RAM
'
eN,
low
Memory
fl
l
lC
t , i
gl'lll
i (52:).
8000H
-
BFFFH
(bank 2,
bank
3).
52
5LCT
'"
H;gh Wheo
th
il'illna
l i,
at
low
, OIJtput
of
Ihe memory
.....
d I/O select signal il
disebled.
Oi$llbled lig
nll
l
Irl:
CSOOi,
'CST23,
em,
RAM3,
ii'AM2
,
'RAMi,
10E,
rnso,
KA2,
KA
1, KAQ,
C/
O,
Ind
iOFfi5:
This
input
is
In
OU
lput
to
the
subcont
ro
ll
er
Ind
is . t I h
ig
h level wh
eo
the Iystem
II
'".
-
21-