Motorola MVME167 Series User Manual page 30

Operating Instructions
The red FAIL LED (part of DS1) lights when the BRDFAIL signal line is active.
The MC68040 status lines are decoded, on the MVME167, to drive the yellow
STAT (status) LED (part of DS1). In this case, a halt condition from the processor
lights the LED.
3
The green RUN LED (part of DS2) lights when the local bus TIP* signal line is
low. This indicates one of the local bus masters is executing a local bus cycle.
The green SCON LED (part of DS2) lights when the VMEchip2 in the MVME167
is the VMEbus system controller.
The green LAN LED (part of DS3) lights when the LAN chip is local bus master.
The MVME167 supplies +12V power to the Ethernet transceiver interface
through a fuse. The green +12V (LAN power) LED (part of DS3) lights when
power is available to the transceiver interface.
The green SCSI LED (part of DS4) lights when the SCSI chip is local bus master.
The green VME LED (part of DS4) lights when the board is using the VMEbus
(VMEbus AS* is asserted by the VMEchip2) or when the board is accessed by the
VMEbus (VMEchip2 is the local bus master).
3-2 MVME167 Single Board Computer User's Manual