Intel PT-6IBT User Manual page 17

440BX/ZX AT
(A) CN1: Keyboard Connectors
Either the PS/2 (CN20) type or the AT (CN1) type keyboard connector can be
installed here, ( only one connector can be installed) The factory default is the AT
type connector installed on the board. When the AT type K/B installed on the
board, the PS/2 type (CN20) become invisible.
K/B CONNECTORS:
Either PS/2 or AT type K/B connector
can be installed on the mainboard.
Basically, these two connectors share
the same space, so there is only one
connector can be installed.
Default: AT type connector installed.
Pin assignment of PS/2 keyboard connector: (CN20)
Pin # Signal name
1 Keyboard Data
2 No Connection
Pin assignment of AT keyboard connector: (CN1)
Pin # Signal name
1 Keyboard clock
2 Keyboard data
MAINBOARD
+
-
BAT 1
IDE 2
IDE 1
Pin #
3 Ground
4
Pin #
3 No connection
4 Ground
AWARD BIOS SETUP
DIMM 3
DIMM 2
DIMM 1
FDC
Signal name Pin #
+ 5V DC
Signal name Pin #
3-3
Signal name
5 Keyboard Clock
6 No Connection
Signal name
5 Keyboard Clock
6 + 5V DC