Datron 1061 Calibration And Servicing Handbook page 56

44
TP6
PROCESSOR
ADDRESS
BUS
r5V
+5V
øz
XDDSP
<l
DO
Dl
PROCESSOR
DATA
BUS
FIG.3.47
DISPLAY
DRIVER WRITE
CIRCUITRY
SELECT
M9
B
B
B
2S
3
cso
D5
D1
R/W
D7
M1
RAM
D2
D3
Display block
energised
or
operation
implemented
from Ml1
1
1
3
5
7
I
1
2
4
6
I
10
Reset
Counter
RAM
(M1)
A3 A2 A1
A0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
1
1
1
t
1
1
COUNTER
(M8)
03 02 01
o0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
3
0
1
1
0
0
1
1
0
0
1
t
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
l.r
,_i,
I
I
'r!.
I
J -".
Block
Number
+1
2
34s679910
FIG. 3.48 DISPLAY DRIVER
READ
MODE
ADDRESS STATES
11