As I remember the NM29A080 and NM29A040 FEEPOM
from National are fast and have 8Mb and 4Mb,
and use a 3-wire interface. But they aren't
more produced....but you can still find them.

--
Sami Khawam
sKhawam@bigfoot.com
a9501901@unet.univie.ac.at
http://unet.univie.ac.at/~a9501901