Fatal Trap 12 while first boot

[Thomas Beer]

Dear All,

I copied the 5.2.1-Release disks from freebsd.org and tried booting.
Kernel.flp runs smoothly. Insterting mfsroot floppy boots
normaly, too. After or during the boot procedure a
"Fatal trap 12 page fault while in kernel mode pops" up.
I would like to install FBSD on a IBM T42p. I searched
the archives on freebsd.org and googled around with
no definitive results. If there is more information needed
I would be glad to provide them.

Thanks Tom