User guide
4.4 Initialization Sequence
The diagnostic test sequence for a full power-on reset and initialization is shown
in Figures 4–3, 4–4, and 4–5.
Figure 4–3 SROM Test Flows
Initialize 21064 and 21072 chipset
Initialize SIO chip
Console serial port initialization
Bcache configuration
Main memory configuration
Bcache initialization
B
8
7
6
5
4
3
2
1
LED
Display
Power-on/Reset
Notes
Serial ROM
Serial ROM
Serial ROM
Serial ROM
Serial ROM
Serial ROM
Serial ROM
ML013408
Check debug jumper, jump to SROM mini-debugger
if jumper installed, else start the console firmware
Bcache and main memory scrubbed to valid ECC
Firmware loaded from flash ROM to
main memory at 8000
4–30 Diagnostics