On Fri 28 Nov 1997, maximum entropy wrote:

> Here's a traceback of the crash from the BOOTX kernel (typed in
> manually, please pardon any typos):
> 
> panic: Bus error
> Stopped at	_Debugger+0x6: unlk	a6
> db> trace
> _Debugger(0,dbdec,87eea,87dd4,0) + 6
> _panic(87dd4,0,0,dbf68,abd80) + 40
> _panictrap(0,74d,300022c,dbe44) + aa
> _trap(0,74d,300022c) + 1e2
> faultstkadj(a34d4,116000,dc000,3,0) + 0
> _pmap_steal_memory(8000,0,dfffffc,abd80,dbf6c) + a0
> _vm_page_bootstrap(dbf68,dbf64,19b22,0,dbfa8) + 54
> _vm_mem_init(99eac,0,3,fffffffc,1000000) + 12
> _main(dbfb4) + 2c

Since this happens during the registering of free pages (at least it looks
this way), the first thing I would try is adding the options '-s -S 4194304'
to the loadbsd command line. This starts the kernel with 4Mb ST-RAM only.

If this helps, either the detection of the RAM size or the handling of the
amount is wrong. When it helps, some fiddling with the 's', 'S' and 'T' flags
might provide some usable info ;-)

Oh, the meaning of the flags:
    -s  Use only ST-compatible RAM
    -S  Set amount of ST-compatible RAM
    -T  Set amount of TT-compatible RAM

Leo.