TRI_PORT_RAM
sc->sc_mem = (void *)(TRI_PORT_RAM + TRI_PORT_RAM_LANCE_OFFSET);
#define XP_SHM_BASE TRI_PORT_RAM
{ TRI_PORT_RAM, TRI_PORT_RAM_SPACE, RW },
mem = (void *)(TRI_PORT_RAM + 0x010000); /* XXX */