IBASE MB941 User Manual
Page 20
INSTALLATIONS
16
MB941 User’s Manual
CN3: Parallel Port Connector
CN3 is a DB-25 external connector on top of the VGA and serial ports.
CN3 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
Slin
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
CN4: VGA CRT Connector
CN4 is a DB-15 VGA connector. 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
VCC
9
10
GND
N.C.
11
12
DDCDATA
HSYNC
13
14
VSYNC
DDCCLK
15