User`s guide

MegaRUM II PCI Motherboard User’s Guide

Step 8 Attach Cables, Continued

Optional USB Cable You can only use a custom USB cable with this

motherboard. You can order this USB cable (AMI part

number CBLKIT-USB-1) from American Megatrends at

800-828-9264.

Warning

The pinout for the optional USB Cable Box is:

Pin 1 Red VCC

Pin 2 Green Data +

Pin 3 White Data -

Pin 4 Black Ground

Please make sure that the USB cable is correctly installed. Incorrect

installation will damage the motherboard.

J3 USB Connectors J3 is 4-pin USB (Universal Serial Bus) stacked

connector. The pinouts are:

Pin Signal Description

1 VCC

2 Data+

3 Data–

4 Ground

JP14 BIOS Size Select JP14 is a 3-pin berg that enables you to choose the

BIOS size.

Pin Description

Short pin 1-2 BIOS size = 256KB (default)

Short pin 2-3 BIOS size = 128KB

JP16 Power Button JP16 is a two-pin single-inline berg.

Cont’d