Using Intel PL/M-51 If you still have Intel PL/M-51 source code that you want to include into your μVision2 project, you may add these source files as custom translated files in the μVision2 project tree. In addition you must insert also the *.OBJ files that are created by PL/M51 and the Intel PLM51.LIB. The options for the PL/M-51 compiler are set in the Options – Properties dialog. This dialog opens with a right mouse click on the source file.