constant EXT_EXTMEM_ADDR: ext_addrid_t := x"FFFFFFB";
constant EXT_TIMER_ADDR: ext_addrid_t := x"FFFFFFC";
constant EXT_AC97_ADDR: ext_addrid_t := x"FFFFFFD";
constant EXT_EXTMEM_ADDR: ext_addrid_t := x"FFFFFFB";
constant EXT_TIMER_ADDR: ext_addrid_t := x"FFFFFFC";
constant EXT_AC97_ADDR: ext_addrid_t := x"FFFFFFD";