Epson PX-8 Technical Manual page 303

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REV.-A
Pin No.
Signal Name
In/Out
Function
14
CSP 1
Out
PROM chip select.
15
PRDO
In
PROM data 0
16
CSPO
Out
Chip select
17
PRD 7
In
PROM data 7
18
PRA 1
Out
PROM address 1
19
PRAO
Out
PROM address 0
20
PRD 6
In
PROM data 6
21
PRD 1
In
PROM data 1
22
PRD4
In
PROM data 4
23
PRD3
In
PROM data 3
24
PRD 2
In
PROM data 2
25
PRD 5
In
PRD data 5
26
MTDA
Out
Microcassette drive motor control signal A
27
MTDB
Out
Microcassette drive motor control signal B
28
MTDC
Out
Microcassette drive motor control signal C
29
G
-
Ground
30
N/C
-
Not used
31
SWMCT
Out
Microcassette power switch
32
CNTR
In
Counter signal from microcassette
33
RDMC
In
Microcassette read data
- -
34
CSLV
Out
SED1320 VRAM chip select signal. Low le-
vel when addresses 8000 to BFFF are speci-
fied.
35
N/C
-
Not used.
- -
36
CSLC
Out
SED1320 internal register select signal. Low
level when addresses 0024 to 0027 are spe-
cified.
37
AB15
In
Slave CPU address 15
38
AB14
In
Slave CPU address 15
39
N/C
-
Not used.
7-32

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