This resource adds the gate system like in hyper metroid/ exertion.
Just place a switch plm in one room, and the gate plm in the other, and shooting the switch permanently unlocks the gate.
The switch can open gates that are in the same room, and you can choose what kind of gate it is (blue gate, red gate, green gate, yellow gate)
There are 2 versions: one with where the switch displays a msg box, and one where it doesn't.
the msg box version can optionally display a number (to tell the player how many gates are left).

Included are files to add when using SMART to have an easier time in the editor
More instructions in the files themselves

Update: condensed both PLM's into 1 patch, now you can choose for each plm individually whether it displays a msgbox or not, and whether it affects the total gate count of the hack

Credits to Smiley for the original code and oi27 for helping me with a sfx problem
also thx to OmegaDragnet7 for the idea of adding SMART files
Now you don't have to rely on the golden four anymore!

*27/01/2023
-fixed wrong opcode
-made sure to prevent crashes with the highest bit of the switch plm

Enjoy! (and credit please)