J1: Parallel Port Connector; J2: System Function Connector - VIA Technologies IB781 User Manual

J1: Parallel Port Connector

Signal Name
Line printer strobe
PD0, parallel data 0
PD1, parallel data 1
PD2, parallel data 2
PD3, parallel data 3
PD4, parallel data 4
PD5, parallel data 5
PD6, parallel data 6
PD7, parallel data 7
J1
ACK, acknowledge

J2: System Function Connector

J2 provides connectors for system indicators that provide light indication
of the computer activities and switches to change the computer status. J1
is a 20-pin header that provides interfaces for the following functions.
Hard Disk Drive LED
SMI / Hardware Switch
Speaker: Pins 1 - 4
This connector provides an interface to a speaker for audio
tone generation. An 8-ohm speaker is recommended.
Busy
Paper empty
Select
Not Defined
Power LED
IB781 User' s Manual
INSTALLATIONS
Pin # Pin #
1 14
2 15
3 16
4 17
5 18
6 19
7 20
8 21
9 22
10 23
11 24
12 25
13 N/A
Reset Switch
ATX Power On Switch
Speaker
Pin # Signal Name
1 Speaker out
2 No connect
3 Ground
4
Signal Name
AutoFeed
Error
Initialize
Select
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
N/A
+5V
15