Epson PX-8 - Page 303

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.
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