The Geekport is reasonably well-documented -- this is a direct logic analyzer port on the bus on the mainboard (in the form factor of a CPU socket -- upper righ

The Geekport is reasonably well-documented -- this is a direct logic analyzer port on the bus on the mainboard (in the form factor of a CPU socket -- upper right of the photo on this page): http://testou.free.fr/www.beatjapan.org/mirror/www.be.com/products/bebox/dual603spec.html http://testou.free.fr/www.beatjapan.org/mirror/www.be.com/pr...