I'm beginner. My FASM code made the data processing. But I can't see data processing result by working code program step by step or in the end of working in register or memory. My ask: whether any FASM or Windows environment command (s) for this cases (for debugging etc.)?
Many thanks for answer.

Allo10,

There are none (unless you write them). Use proper tools (e.g. debugger).

In Windows the simplest debugging is to output some strings to MessageBox. When you need one digit, you can just output a character 0x30+number. 6 would become 0x36.

With register or memory you need to use a debugger.

not only underwindows.

any platform that lets you display strings can be used for the main program, and debug.

there are many games that have a debug mode, a mode that displays some datas, and let you play with, instead of moving sonic, jump, etc, you can select gravity, item, etc.

see "sonic 3 & sonics & knuckles debug mode" in youtube for more ideas.

Allo10,

Are you familiar with C formatted I/O? MSVCRT.DLL can give you printf(), along with other (you aren't afraid of console, are you? ).