ZLM, Trust me, I appreciate your responses. But I am not getting the answer I need from you. I need a 1 meg chip in place. not the 4meg. The machine I am installing them in wont recognize the 4 meg. I need the machine to think it is a 1 meg. I have done this before where I needed a 1 meg to read like a 512k. I had to change the offset. My memory sux so I don't remember what I did. I have change the offset. I don't know what value I need to use.