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Sharp PC-1350 - SC60220 Gate Alley LSI; Gate Alley LSI Functionality

Sharp PC-1350
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Vee
Inpu
t
b
u
ffer
-
11
-
.,_
R....:O....:M
~
N
ot
use
d
(F05
i
nv
e
rt
ed
o
ut
put
)
To
the
S
I
O
connector
Key strobe
(P-type open
dra
in
o
u
tp
u
t)
RAM
Card
CE
R
A
M
1
CE
RAM2
CE
DI SP
1
CE
D
I
SP
2
CE
DI SP
3
CE
DI SP
4
CE
DISP
5
CE
OUT4
IJJ
RR
OUTl
IJJ
SD
OUT2
1JJ
ER
OUT3
IJJ
R
S
Un
i
t
c
el
l
...
....
•.'\
...
A1
4
~
OPCE
...
..
.....
..
...
A1
3
,_
R
A
M
l
_
...
A12
....
R
A
M2
:
...
,_
:
A
ll
-
..
Ad
d
r
ess
de
c
ode
r~
DE
1
...
~ AlO
,,
-
D
E
2
...
:- A9
"'
DE
3
...
-
...
....
,....
...
-
DE
4
...
-
....
-
DE
5
-
...
...
...
R
/
W
I
,,
A
...
D6
K07
...
....
D5
...
...
K0
6
-
,,
....
....
D
4
KO 5
...
,,
·
~
-
D
3
K04
....
....
D
2
D
ata
l
atc
h
....
...
K03
...
....
Dl
...
...
K02
...
....
DO
....
...
KO
1
...
....
....
C
P
U
Fr
o
m
signals.
SC60220 Gate
Alley
This LSI chip
is
used
to
decode various LSI (RAM, DISP) chip
s
e
lect signals,
to
generate key
strob
e, and
to
b
u
ffer SIO
output
BOS
-
PC-13
5
0

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