Specifications

EPC-8A Hardware Reference
60
Parallel Port
The DB-25 LPT1 parallel port connector is defined as:
Keyboard
The keyboard connector is a 6-pin DIN defined as:
13
1
25
14
Table C-3. DB-25 Pin-out
Pin Signal Pin Signal
1 Strobe 14 Auto line feed
2 DB0 15 Error
3 DB1 16 Initialize printer
4 DB2 17 Select in
5 DB3 18 Signal ground
6 DB4 19 Signal ground
7 DB5 20 Signal ground
8 DB6 21 Signal ground
9 DB7 22 Signal ground
10 Acknowledge 23 Signal ground
11 Busy 24 Signal ground
12 Paper end 25 Signal ground
13 Select 26
Table C-4. Keyboard Pin-out
Pin Signal Pin Signal
1Data 4+5V
2 Not used 5 Clock
3 Ground 6 Not used
1 Reference voltage 2 Speaker tone
6
1
2
4
5
3