SOYO SY-KT880 DRAGON 2 User Manual page 35

Hardware Installation
1. Onboard Serial Ports (COM)
External peripherals that use serial transmission scheme include:
- serial mouse
- modem
Plug the serial device cables directly into the COM1/COM2 9-pin male
connectors located at the rear panel of the motherboard.
2. Parallel Port PRT (LPT)
This parallel port is used to connect the printer or other parallel devices.
Plug the parallel device cable into the 25-pin female connector located at the
rear panel of the motherboard.
COM Pin Assignment
4
NDCD#
1
NRXD1
3
NTXD1
5
NDTR1#
7
3
GND
9
1
-STB
2
PRD0
3
PRD1
4
PRD2
PRD3 5
PRD4 6
PRD5 7
PRD6 8
PRD7 9
ACK# 10
BUSY 11
PE 12
SLCT 13
31
SY-KT880 DRAGON 2
NDSR1#
2
NRTS1#
4
NCTS1
6
NRI1#
8
14 AFD#
15 ERR#
16 INIT#
17 SLIN#
18 GND
19 GND
20 GND
21 GND
22 GND
23 GND
24 GND
25 GND