IBM 8668 Hardware Maintenance Manual - Page 51
System board external port connectors, System board switches and jumpers
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System board external port connectors The following illustrations identify system-board connectors for external devices. Note: The illustrations in this document might differ slightly from your hardware. Serial ports (J20) Mouse/keyboard ports (J8) Ethernet port (J6) USB ports (J5) ISM ports (J50) Management (not supported) Video port (J36) Note: ISM ports (ISM A and B) are used for the RS-485 interconnect network communications. System board switches and jumpers The following illustration identifies the switches and jumpers on the system board. Note: The illustrations in this document might differ slightly from your hardware. System board Switch block (SW1) SW1 Flash boot block recovery jumper (J16) Installing options 43 ON 1 2 3 4 5 6 7 8
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