На всякий случай приведу доступную распиновку на HOT-541:

На всякий случай приведу доступную распиновку на HOT-541:

Цитата:
PS/2 Mouse Connector
541 mainboard provides two type of PS/2 style mouse connectors, one for 12 pin header JP52 near by keyboard connector and one for optional mini DIN type connector.
12 pin header connector support two type connection (Type A and Type B) for PS/2 mouse, the right table shows the pinout connection for each type.

PIN       TYPE A       TYPE B
 1        Empty        Clock
 2        Ground       Empty
 3        Clock        Ground
 4        Ground       VCC
 5        VCC          Data
 6        Empty        Empty
 7        Empty
 8        Empty
 9        Data
10        Empty

опять про PS/2 на пентиум I