Thanks very much for the information.

I am new to the embedded world. Your post actually brought up another interesting point. In one of the introductory embedded system programming books I read, the author said usually he found it is the code memory that is lacking, not the data memory. In my own (limited) experience, it is the same too. But you reminded me that in some applications, what is lacking is the data memory.

I guess the original question is kind of stupid since there are so many different applications so obviously whether 64KB code space is sufficient or not depends on the kind of application one do.

The chip our company makes is a 8051+embedded 10Mbps Ethernet. I have ported a simple TCP/IP/HTTP stack to the chip and the code size is about 14K. I would imagine most of our customers will use this chip in an internet-enabled device. I am just wondering for this specific kind of application/scenario, will the other 50K code space be enough for most customers.

Thanks for everyone's help.