On Fri, 1 Nov 2002, Kevin Hester wrote:
4MB (as in bytes, not bits ;-))
If you are using an off the shelf motherboard, it is unlikely all of these address bits are pulled out to a socket.
On the motherboards we have only 18 bits came out, and I had to wire in bit 19 myself. DoC fixed that problem, but on the PLCC there is a problem.