Jon, I tried that example you gave me, and it didn't seem to work. I think there may be problems with the development kit. David
I tried 0xefff and it is happy there but for some reason doesn't like 0xffff. 0x14 was from one of there examples i was playing around with. Question: the datasheet says 128k rom and 128 ram. Does this mean that total space is 128k and i'm just breaking it up into segments and defining the types? So i can have 64k ROM and 64k RAM? Also if i'm using only 128k then i really on need one page register? ie PageA and the others are for larger memory spaces. In this case its just memory fold over right? David