I am trying to use the second serial port and have been trying to use the example from http://www.keil.com/support/docs/2601.htm I get the error 67 undefined identifier. Any body know how I can get rid of this. Thanks
You are compiling for XC161 or XC167, aren't you? The special function register definitions for ASC1 in the file XC16X.H are braced with the following ifdefs:
#if defined (__XC161_H__) || defined (__XC167_H__) ... #endif