You can turn that fast ram into chip ram by making two changes to the mobo - opening a jumper (=cutting a track) and closing another (on 3-part JP2, cutting the lower and joining the upper). On JP 7A (3-part) you have to cut the track between the lower and middle pad. That's it. Precludes that your Agnus is 1 MB capable - most probably it is; for example SysInfo shows it.
