Chapter 1 Hardware Installation
27
Step 6 Attach Cables,
Continued
P9 Keyboard Connector
The keyboard connector is a 6–pin DIN socket. The pinout is shown
below.
Pin
Assignments
1
Keyboard clock
2
Keyboard data
3, 6
Not used
4
Ground
5
VCC
Connect Mouse Cable
P8 is the mouse connector. P8 is a 10–pin berg. The mouse cable is the
same as the serial cable in the motherboard. Two serial cables are
shipped with the motherboard. Use one of these cables for the mouse,
or make your own cable. The pinout is:
Pin
Description
Pin
Description
1
Mouse Clock
2
N/C
3
N/C
4
N/C
5
N/C
6
VCC
7
N/C
8
Mouse Data
9
Ground
10
N/C
J15 PS/2 Mouse IRQ
J15 is a three–pin berg that enables the PS/2 mouse interrupt IRQ12).
Short Pins 2–3 of J15 to enable IRQ12 as the PS/2 mouse interrupt. You
should always short Pins 2–3 of J15 to enable the PS/2 mouse interrupt.
The only reason you would ever have to short Pins 1–2 of J15 is if you
wanted an adapter card on the ISA bus to use IRQ12. You would then
have to set the Mouse Support option in Advanced Setup to Disabled.
J15 Pins 2-3 Shorted
IRQ12 used for PS/2 Mouse
Cont’d
