Service manual
MZ-80K
~
•
07
06
05
04
03
02
01
DO
Write-in data
$00
0 0 0 0
0
0 0
IT]
_ Error
Read-out data
$01
0
0 0
0
0
0
0
to
occur
RAM,][i
RAM(ll)
RAM(
I)
RAM(l)
$1000
~
$4FFF
(with
16KRAM)
DO
17
I
9
I
1
RAM (II)
01
18
I
10
I
2
$5000
~$8FFF
(with
16KRAM)
02
19
11
I
3
$5000
~$5FFF
(with
4KRAM)
03
20
12
I
4
RAM
(Ill)
I
21
13
I
5
$9000
~$9FFF
(RAM
(11)
16KRAM)
04
RAM (III)
4KRAM
05
I
22
14
I
6
I
$9000~$CFFF
(RAM
(11)
16KRAM)
06
I
23
15
I
7
I
RAM (1II)
16KRAM
07
I
24
16
I
8
I
$6000
~$6FFF
(RAM
(11)
4KRAM)
~
RAM
(Ill)
4KRAM
• Waveform
of
Each
Pin
of
CPU Board
At
pin
®
of
IC7
At
pin
®
of
ICg
At
pin
CD
of
IC27
8MHz
2MHz
63J.lS
At
pin
(2)
of
IC10
At
pin
@
of
IC18
At
pin
@
of
IC13
~
I1
n
0----
nJl
63J.ls
31.25KHz
13ms
At
pin
Q]i
of
IC20
At
pin
®
of
IC21
At
pin
CD
of
IC8
I
U
L
~
~
I
~
l
1
17ms
17ms
63J.lS
-11-