epia m vga + memcpy failed

That message is from the original freebios.  I was thinking that shadowing is not corretly set up and that maybe the
segment is write-protected.  After setting up shadowing,
the chipset my turn on write protection by default, anyway.  I don't know how to turn write protection off specifically for the C00000 segment.  So far, the only reference that I can find about write protection is in the Pentium developer's manual. It says to have bit 16 of CR0 be zero to turn off write protection.