Ultra 440BX ATX Mainboard
INSTALLATION
3-4
(B) CN1CN2:
PS/2 Mouse and Keyboard Connector
DIMM3
BIOS
DIMM2
DIMM1
+
CN2 : PS/2 Mouse Connector
CN1 : PS/2 Keyboard Connector
(C) CN3 : Serial Port COM 1 Connector
(D) CN4 :
Serial Port COM 2 Connector
DIMM3
BIOS
DIMM2
DIMM1
+
COM 1
COM 2
CN4
CN3
( COM ports viewed from the real panel)
Ping assignment of serial port connector:
1 6
Pin # Signal name
Pin # Signal name
?
?
1
DCD (Data Carrier Detect)
6
DSR (Data Set Ready)
?
?
2
RD (Received Data)
7
RTS (Request To Send)
?
?
3
TD (Transmit Data)
8
CTS (Clear To Send)
?
?
4
DTR (Data Terminal Ready)
9
RI (Ring Indicator)
?
5
Ground
5 9
I/O address 3F8H/2F8H/3E8H/2E8H, IRQ3/IRQ4, selected by CMOS setup.
