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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
На всякий случай приведу доступную распиновку на HOT-541: