Heathkit H9 Manual page 80

Page 78
Integrated Circuits (cont'd.)
3 Y GND
AY-3 -1015
TMS6O1 1 N
1M6402
UNIVERSAL ASYNCHRONOUS
RECEIVER/TRANSMITTER
RD A
DA
S
R
NC 'N O INTER NAL C ON NIC TION
llt4 0
239
l
38
4
) l
5
tt
6
j 5
l l , 2
19
22
20
z\
1
)4
8) 1
1
t l
10
3i
l l
30
12
29
t 3
28
l 4
27
r t
?6
16
25
17
24
4K( 1024x4)
STATIC RAM
Al
A 2
d3
GND
U 02
| 103
|04
WE