I have been working on a 16C84 project using the latest MPLAB, version 3.22.00. I have not had any success using addresses beyond 1FF in the simulator. The ROM window only lists addresses 0-1FF, and any GOTO to labels beyond 1FF wraps to the 0-1FF range. Simulating the same code in an older version (3.09.10) works fine. Has anyone else seen this problem? What am I doing wrong? TIA. Brent Miller