Hi guys, I am using keil C51 to do the program and debugging the cypress FX2 ezusb chip. In my project options I selected Cypress FX2 as the device type. Should I add an include file in my .a51 file? Also, if I need to add one instruction at location 0043h, how do I do it? I tried CSEG 0043h, keil says syntax error. I am new to both cypress fx2 and keil.