Epson PX-8 Technical Manual page 304

REV.-A
Pin No. Signal Name
In/Out
Function
40
N/C
-
Not used.
41 DAO
In/Out
Slave CPU address data bus 0
42 DA4 In/Out Slave CPU address data bus 4
43 DA5
In/Out
Slave CPU address data bus 5
44
DA6 In/Out Slave CPU address data bus 6
45 DA 1
In/Out
Slave CPU address data bus 1
46 DA 7
In/Out Slave CPU address data bus 7
47 DA3 In/Out Slave CPU address data bus 3
48 DA2
In/Out
Slave CPU address data bus 2
49 E
In
Enable signal from slave CPU 6303
50 N/C
-
Not used.
51 SWPR
Out
PROM power switch
52
TEST
-
Test terminal. Normally kept low.
-
53
R/W
In Read/write signal from slave CPU 6303
- -
54 SINT In Interrupt signal from SED 1320
55 AS Out Address strobe signal from slave CPU 6303
56 PRD Out
AND output from RDMC input and SMMC.
Outputs RDMC input to terminal when
SWMC is high.
57
N/C
-
Not used.
58 RS In Reset signal
- -
59 IROO Out Interrupt request signal to slave CPU
60 VC
-
Circuit voltage (+5V)
7-33