FreeBSD boot install: panic

[Andrea Di Pasquale]

Hi,

I'm using ibook (rev. 2002) with Powerpc G3 750FX 800 Mhz,
when i try to boot freeebsd install, it puts this:

	Fatal kernel trap:

		Exception           	= 0x4 (Instruction Storage Interrupt)
		Virtual  address 	= 0x4d3fa8
		srr0			    	= 0x4d3fa8
		srr1				= 0x8003032
		curthread		= 0x570520

			pid = 0, comm =

	Panic: Instruction storage interrupt trap
	Uptime: 1s

Can you help me?
Regards,
Andrea