Download links are below for full A3 printable tables showing the details of the BeagleBone multiplexer settings.
To configure the BeagleBone multiplexer under Angstrom from the command line use
echo 6 > /sys/kernel/debug/omap_mux/gpmc_a2
6 = Multiplexer Mode
gpmc_a2 = the Mode0 name of the pin you are trying to configure
Results in setting of Port 9 Pin 14 soe ehrpwm1A_mux1
Download links for Mux Lookup tables