writing a bios

Recommended by Wim's BIOS...

we are designing a new product with an x86 celeron in it.
In order to get the cost down on our system, we are looking a writing our own bios since bios's cost between 10 and 20 dollars.
Is there freeware source code for a bios that i can use as a starting point.
alos, is there any good documentation out there about bios focused on writing one.

thanks,
jeff

[Rainbow]

The only thing I found is this http://www.freiburg.linux.de/OpenBIOS/...