DEF DIRF_UP EQU (1 << 0)
DEF DIRF_RIGHT EQU (1 << 1)
DEF DIRF_DOWN EQU (1 << 2)
DEF DIRF_LEFT EQU (1 << 3)

RSRESET
DEF DIRB_UP RB 1
DEF DIRB_RIGHT RB 1
DEF DIRB_DOWN RB 1
DEF DIRB_LEFT RB 1