Notes on the Java box only

Level 10 interrupts appear to come in frequently.
Code at "level10" in locore.s begins the interrupt.
That code fetches the address in v_level10clk_addr which is hardcoded
as ffeee000. As the kernel is stopped, that virtual address
is mapped to 0x71d10000. The code loads two consecutive words
from that location. The ROM debugger cannot access those
addresses.
Accessed with ROM code, the second word seems always to be 
between 8060000 and 809c4200 which is the constant value in the first word.
The right 9 bits were 0 on each of many reads.
A comment says that reading the words is to dismiss the interrupt.