Turbo Pascal for 8051 microcontrollers
Pascal is easy to write and easy to read
Turbo51 is released as a freeware. You can use Turbo51 for hobby projects and for serious work. Check documentation pages and code examples that show the syntax, features and generated files. This should be enough to start a 8051 project development with Turbo51. And if you are still missing something or have a problem you can always ask for help.
If you are already familiar with 8051 assembly language programming you can start with Turbo51 as 8051 assembly language compiler and then add some Pascal statements until you become familiar with Turbo51 and Pascal syntax. A good approach is also to compile some Pascal code and then check generated code (ASM file). This way you can learn assembly language, get some ideas on how to write effective code and become familiar with the compiler. Turbo51, like many popular C compilers for 8051, generates optimized code and supports source-level debugging with OMF object file.