Motorola MVME167P Installation And Use Manual page 35

System Considerations
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global bus timeout, the MVME167P waits forever for the VMEbus cycle
to complete. This will cause the system to lock up. There is only one
situation in which the system might lack this global bus timeout: when the
MVME167P is not the system controller and there is no global bus timeout
elsewhere in the system.
Multiple MVME167Ps may be installed in a single VME chassis. In
general, hardware multiprocessor features are supported.
Other MPUs on the VMEbus can interrupt, disable, communicate with,
and determine the operational status of the processor(s). One register of the
GCSR (global control/status register) set in the VMEchip2 ASIC includes
four bits that function as location monitors to allow one MVME167P
processor to broadcast a signal to any other MVME167P processors. All
eight registers of the GCSR set are accessible from any local processor as
well as from the VMEbus.
The MVME167P provides +12Vdc power to the Ethernet LAN transceiver
interface through a 1A solid-state fuse (R24) located on the MVME167P
module. The +12V LED illuminates when +12Vdc is available. If the
Ethernet transceiver fails to operate, check the status of R24.
The MVME167P provides SCSI terminator power through a 1A fuse (F1)
located on the LCP2 adapter board. The fuse is socketed. If the fuse is
blown, the SCSI device(s) may function erratically or not at all.
If a solid-state fuse opens, you will need to remove power for several
minutes to let the fuse reset to a closed or shorted condition.
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