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Chapter 1 Motherboard Description PS/2 Mouse / Keyboard Connectors Pin Signal Name 1 Data 2 No connect 3 Ground 4 +5 V (fused) 5 Clock 6 No connect 1.4.2 USB Connectors : USB1 '= & )&! , +4&)!! !-= &A'! & 4 &)! K + 4 8)! & ! USB1 Stacked USB Connectors Pin Signal Name 1 +5 V (fused) 2 USBP0- USBP1- 3 USBP0+ USBP1 4 Ground Note: (1) Signal names in brackets ( ) are for USB port 1. <