P4X MAINBOARD SERIES
Page 22
2.8.1. PS/2 Keyboard connector.
Connector: CN 1
Type: 6 pin female
This connector only supports a PS/2 keyboard plug. If you have a standard AT
size (large DIN) keyboard plug, you need to use a mini DIN adapter.
2.8.2. PS/2 Mouse connector.
Connector: CN 2
Type: 6 pin female.
This connector only supports a PS/2 mouse plug. If a PS/2 mouse is detected
then IRQ 12 will be directed to CN 2.
2.8.3. Serial Port 1 (COM 1) and Serial Port 2 (COM 2)
Connector: CN 3 (COM 1)/ CN 4 ( COM 2)
Type: 9 pin male/9 pin male
One serial port is available for a mouse and other serial devices.
(I/O addresses used are 3F8H/2F8H/3E8H/2E8H and IRQ3/IRQ4, selected by
CMOS setup.)
2.8.4. Parallel Port Connector
Connector: CN 5
Type: 25 pin female.
This parallel port is used by printers which support the SPP, EPP and ECP
modes IRQ7 or IRQ5 can be selected. The ECP mode will use either DMA 3 or
DMA 1 (which can be selected by the BIOS setup program).
CN 1: PS/2 KB
CN 2: PS/2 MS
CN 6: USB 1 CN 3: COM 1
CN 4: COM 2
CN 5: LPT
CN18: Game/MIDI Port
SPK-OUT
LINE-IN
MIC-IN
CN 7: USB 2
2.8. External Connectors
Hardware Installation
