Hiya, added this simple but really useful (for me anyway) feature of NOP-list into the dosbox debugger.
It stores and replaces any instruction on current codeline with NOP(s) when you press F8 and highlights the line.
If you go over the NOP and press F8 again, presto, the original code is back. Also command "NOPLIST" prints out the list of altered locations.

In layman's terms, it's for reversing programs by "commenting out" stuff and seeing what it was for when resuming execution (without having to resort to separate hexeditor/tedious copypasting of addresses and stuff) .."oh now I can walk through walls, must've been collision routine", "oops gfx got corrupted, better put that back" etc.
Thanks for great software btw, have fun.