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PD2364C
is
SK
Mask
Byte
written
in
this
ROM.
1.
The
Address
Memory
(AO-Al2)
.
the
2.
The
content
of
3.
Chip
Select
(EE)
line
to
data
.
Basic
and
Monitor
System
(uPD2364C-331,
pPD2363C-332)
Address
shown
decoder
as
The
block
diagram
of
M2
A0
o-Ag _.Q
A»
o-+3
A2
A5
o-_~$ _.L_f1D_
M
Q_..H
A5
S33
A6
AT
Aao->C.'
_.'S2
A9
.. O_.2
A||;¢-L
Rom)
MASK
(8,\92
BYTE
(5v)
Aszgmo
Arr
D1
D6
A9
A9
V.-C
& @BE B
BBEBB BEBN
I
A3
A2
An
Ao
Do
Ar
As
A5
A4
Address
Bus
A.»~Aw-»
Data
Bus
m~D~-
_
Chip
Select
----- ChipSelect
-----
Fig.
5-6
(Read
Rom
Only
Memory)
I3
8
192
of
2
B
te
=
y
,
is
outputted
Memory
is
active
Low
and
content
is
written
Program
in
MB-6890.
table
5-2.
TABLE
5-2
I
R OM
Address
|
$
A oo o
/1PD2se4c-aao
~
1
,,PDz3e4c-331
s
c ooo
~
i
»~
v-
~
-
-
L
"UU
u P D 2 3 6 4 C 3 3 2
s
FFF
o
~
the
is
shown
ROM
at
Fiq
212
3
->
3.
-.
_______
_.r-'
_>
E;
fi
Memory
3
m
_>O'
(8,l92>
E1
__
,Q
\
i.._..¥
¥7§~
E
-1
D4
D5
D3
Oz GND
Du
The
System
Program
_
address
is
selected
13
by
8
lines
of
data
by
is
of
the
memory
in
three
pieces
of
The
Address
is
allocated
s
BFFF
s
n1=z=1=
A
--Q-QQ
5 bb"
s
FFFF
5-7.
Output
Buffer
1
Selector
YY
CS
PrOqra;r
A
CS
5
P W C
Buffer
is
line
line
(DO-D7)
outputted
ROM
by
ROM
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