To enable the compiler to create the *.M51 file, start the *.uv2 file from the project folder.
- Select "Options for Target" from the Project menu.
- Select the Listings tab.
- Check Linker Listing and Memory Map.
After compliing your project you will find the *.M51 file.
Chapter 3 of the Getting Started manual "GS51.pdf" in the C:\Keil\C51\HLP directory after installing the Keil tools.