# Switch 2/6: AT bus compatibility

If your computer is fully AT-compatible, set switch 2/6 to ON. If the Madge Wizard fails to locate the Ringnode, it may be because of incompatibilities in the bus architecture. Try setting switch 2/6 to OFF. If you are using the IBM PS/2 model 30-286, set this switch to OFF.

Switch 2/6 | Bus compatibility
ON (Default) | Normal AT bus-timing
OFF | Alternative bus-timing