Wonder 
Hello, experts. I'm seeing source code on mini2440, u-boot. So I have a question about LAN ADDRESS. How do I know why define address, CONFIG_DM9000_BASE? I could find 0x20000000 in DATASHEET, S3C2440. Maybe, this mean is 'nGCS4=nLAN_CS'. But, why does sourcecode(mini2440.h) use an ADDRESS 0x20000300? thank you for reading.