The addresses are grey coded because it's an asynchronous fifo design.
Normal binary counter comparison is only good for synchronous fifo designs.
-----------------------------------------------------------
Mike
Dini
Phone: (858) 454-3419 ext. 11
President
FAX: (858) 454-1728
The DINI Group La Jolla
cellular: (619) 888-9173
1010 Pearl Street, Suite #6 home: (858)
454-1026
La Jolla, CA
92037-5165
mdini@dinigroup.com
http://www.dinigroup.com