User`s guide

Diagnostics and Troubleshooting
7-3
modules are on for approximately 3 seconds.
b. The ENGINE STATUS LED on the PPE begins to flash.
c. The ENGINE STATUS LED continues to slowly flash while
the remaining modules are running power diagnostics.
d. The TURBO STATUS LED stays on for approximately 3
seconds; then it flashes.
3. After the last interface module has completed its power-up
diagnostics the Packet Processing Engine's ENGINE STATUS
LED will stay on solidly.
4. The TURBO STATUS LED will come on, followed by the
STATUS or PROC LEDs of the interface modules (from the top
down).
5. The LEDs will indicate that the ATX has begun proper
operation, as shown in Figure 7-1.
7.2.2 Specific Power-up Tests
The power-up diagnostic tests performed on the PPE are:
• ROM checksum test
• VDRAM memory tests
• Memory map tests and interrupt tests
• Shared RAM component – AMD 29000 processor's access to
shared RAM, DMA controller's access to shared RAM, various
DMA functions, DMA/AMD 29000 shared RAM arbitration,
interface modules' access to shared RAM and arbitration with
simultaneous access by all processors.
For power-up tests performed on individual modules, refer to the
module’s manual.