INSTALLATIONS
MB820 User’s Manual
17
CN4: Parallel Port Connector
CN4 is a DB-25 external connector situated on top of the VGA and serial
ports. The following table describes the pin-out assignments of this
connector.
CN4 Parallel Port
Signal Name
Pin #
Pin #
Signal Name
Line printer strobe
1
14
AutoFeed
PD0, parallel data 0
2
15
Error
PD1, parallel data 1
3
16
Initialize
PD2, parallel data 2
4
17
Select
PD3, parallel data 3
5
18
Ground
PD4, parallel data 4
6
19
Ground
PD5, parallel data 5
7
20
Ground
PD6, parallel data 6
8
21
Ground
PD7, parallel data 7
9
22
Ground
ACK, acknowledge
10
23
Ground
Busy 11
24
Ground
Paper empty
12
25
Ground
Select 13
N/A
N/A
CN6: VGA CRT Connector
CN6 is a DB-15 VGA connector located beside the COM1 port. The
following table shows the pin-out assignments of this connector.
Signal Name
Pin #
Pin # Signal Name
Red 1
2
Green
Blue 3
4 N.C.
GND 5
6 GND
GND 7
8 GND
N.C. 9
10
GND
N.C. 11
12 N.C.
HSYNC 13 14 VSYNC
NC 15
