Protected processor mode - which development tool to use?

Question

assembler

Hello, please help me choose a tool for performing laboratory work. Condition:

Write a program that switches the processor to protected mode, displays a message on the screen, and then returns the processor to real mode (8 hours).

I use Windows 7 (x64).

Answer 1

I think I already found the answer :)
Tasm + DosBox + sasm.narod.ru/docs/pm/pm_in/main.htm

Answer 2

This can be done with binutils -- as and ld.