On 2004-08-16 darkstar@city-net.com wrote:
> On 2004-08-16 sd20@york.ac.uk wrote:
>
> > Ok, my z50 crashed again today, I was connected to the network, but just
> > looking at my local files with 'cd' and 'ls' - It didn't put me into
> > debug it just froze after spitting out this message:
> >
> > Trap: reserved instruction in kernel mode status=0x120782, cause=0x28,
> > epc=0x8028f448,
> > Vaddr=0xc3311f8 pid=7 cmd=ioflush usp=0x0 ksp=0x80001450
> > Stopped in pid7 (ioflush) at 0x8028f448: spec12 zero,zero,zero
>
>   If I am reading the disassembly code right, this is movz zero,zero,zero
> which is a Mips IV instruction.  It's encoding contains only a single one
> bit, so it might be a hardware problem.
[...]
> (objdump might also consider it to be "ffs zero, zero" or not disassemble
> it; the code should be 0xA)

  Of course, if the code is 0xA it has two bits, not one :/.  (That would
be 0x0000000A in full, still a good possibilty for several types of
hardware error).

Matthew Orgass
darkstar@city-net.com