How to avoid enemies from respawning after leaving the room?

[hateithere]

Hi, so, I've looked through some tutorials and guides about the adventure module, but there's one thing bothering me; there's no instructions on how to avoid enemy respawn? I don't know if it's impossible, as I've seen NES homebrews achieve this without issue. Is there something I'm missing? Basically I can kill all enemies with no problem, but the issue comes when I try to leave the room, which upon coming back to the enemies are there again.

 

[SciNEStist]

The feature you want to look into is screen triggering. A triggered screen has different monster spawns than an untriggered screen, or in your case, no spawns at all.