booting problems (fwd)

|SOFT Booted.
|"
|
|And then absolutely nothing.  The cute little heart on the front panel
|is stuck on. According to the inside of the top cover (oh, what a great
|place to put debug info), this means: "System board fault, HPMC or
|Unknown fault".  At this point I'm going for the third.
|
|Looks like we just need to compare a large chunk of the bootable binary
|to figure out what's happening.
|
|- Alex

Just a note about the "cute little heart". Assuming that the A180 is like the B180, there are 4 LEDs on the front. During booting the BootROM sends one nibble of the chassis code to those 4 LEDs. WHen HP-UX is running, the LEDs are written during the timer interrupt. It's just a memory mapped register, nothing fancy. So unless someone has specifically coded something into Linux to write to the LEDs, it would be the expected behavior that they would stay in the last state the BootROM (or IPL) left them.

-Bill (Hardware-R-Us) Katz