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ADDRESS
-
-L
L L
L
'---
EPROMi
---
EPROMi
-
EPROMi
'---
EPROMi
ROM ROM
ROM
ROM
= 1
r--
= 2
-
= 3
r--
= 4
-
r-
-
r-
-
CS
1
CS
2
CS
3
CS
4
I I I I
'----
DATA
.J
I
-
---
DECODE
POSSIBLE
BUS
CONTENTION
/
I
A
S
.
1S
I
AD
O
•
7
8212
Vee
ADDRESS
LATCH
~
As
. AlO
-
ALE
r-
-1-
I I
"'"
Ao
.
A7
2716
0
0
.
7
-
,~
8085A
~
r--
~
PDiPGM
I-
A
11
.
13
~
~-
GS
o
I-~~
~GSI
~~r--
1:8
t
CS
2
BINARY
I
~
,
DECODE
:CS
3
~
+5V
I I
-
8205
CS
4
Ihl
CS
S
:es
6
j
-1-
IOiM
IC~
Vee
j'
lAce
ADDRESS
CS
\
~
//////////1
\.\\\\\\\\"
DATA
OUT
teo
Figure 8. Traditional 16K EPROM System
A1-9