Personal Computer User Manual

2-2 Computer Group Literature Center Web Site
Operation
2
The on-board Universe ASIC includes both a global and a local reset
driver. When the ASIC operates as the System Controller, the reset driver
provides a global system reset by asserting the SYSRESET# signal.
Additionaly, when the MVME5100 is configured as a System Controller
(SCON), a SYSRESET# signal may be generated by toggling the
ABT/RST
switch to RST, or by a power-up reset, or by a watchdog timeout, or by a
control bit in the Miscellaneous Control Register (MISC_CTL) in the
Universe ASIC.
Note SYSRESET# remains asserted for at least 200 ms, as
required by the VMEbus specification.
Status Indicators
There are two Light-Emitting Diode (LED) status indicators located on the
MVME5100 front panel. They are labeled
BFL and CPU.
RST Indicator (DS1)
The yellow
BFL LED indicates board failure; this indicator is also
illuminated during reset as an LED test. The
BFL is set if the MODFAIL
Register or FUSE Register is set. Refer to the MVME5100 Single Board
Computer Programmer’s Reference Guide (V5100A/PG) for information
on these registers.
CPU Indicator (DS2)
The green
CPU LED indicates CPU activity.
Connectors
There are three connectors on the front panel of the MVME5100. Two are
bottom-labeled
10/100BASE T and one is labeled DEBUG.