Hello. I am new to this community and I hope you can help me with my problem. I need to make a C application for winbond w78c438 but that chip is not natively supported by any compiler ...however...some degree of support can be found in KEIL ...my problem is that I need to tell to the compiler that addresable memory space is 20 bits long...and the register in which the upper 4 address bits reside is at address 0xA2... I've modified one of the *.h files in order to add this feature but I'm still getting errors about pointers... Please advise... Thanks