I'm using last version dosbox svm daum.
Start game in dosbox_debug by 'debug game.exe'
Then I found some interesting part
repe stosb
set a breakpoint on it.
By pressing F11 I got step into by 1 command, but when I press F10, to skip this command debugger doesnt stop on next command and game start working.
What am I doing wrong ?

Sorry for lng, dont have practice. Russian.