Fixes Brain-Mechs, and a tangentially related MMI runtime.

code/game/mecha/combat/combat.dm

@@ -25,7 +25,7 @@
 	if(!melee_can_hit || !istype(target, /atom)) return
 	if(istype(target, /mob/living))
 		var/mob/living/M = target
-		if(src.occupant.a_intent == I_HURT)
+		if(src.occupant.a_intent == I_HURT || istype(src.occupant, /mob/living/carbon/brain)) //Brains cannot change intents; Exo-piloting brains lack any form of physical feedback for control, limiting the ability to 'play nice'.
 			playsound(src, 'sound/weapons/punch4.ogg', 50, 1)
 			if(damtype == "brute")
 				step_away(M,src,15)
@@ -244,6 +244,14 @@
 	else
 		return 0
 
+/obj/mecha/combat/mmi_moved_inside(var/obj/item/device/mmi/mmi_as_oc as obj,mob/user as mob)
+	if(..())
+		if(occupant.client)
+			occupant.client.mouse_pointer_icon = file("icons/mecha/mecha_mouse.dmi")
+		return 1
+	else
+		return 0
+
 /obj/mecha/combat/go_out()
 	if(src.occupant && src.occupant.client)
 		src.occupant.client.mouse_pointer_icon = initial(src.occupant.client.mouse_pointer_icon)

code/game/mecha/equipment/tools/tools.dm

@@ -52,7 +52,7 @@
 		else if(istype(target,/mob/living))
 			var/mob/living/M = target
 			if(M.stat>1) return
-			if(chassis.occupant.a_intent == I_HURT)
+			if(chassis.occupant.a_intent == I_HURT || istype(chassis.occupant,/mob/living/carbon/brain)) //No tactile feedback for brains
 				M.take_overall_damage(dam_force)
 				M.adjustOxyLoss(round(dam_force/2))
 				M.updatehealth()

code/game/mecha/mecha.dm

@@ -344,8 +344,11 @@
 
 /obj/mecha/relaymove(mob/user,direction)
 	if(user != src.occupant) //While not "realistic", this piece is player friendly.
+		if(istype(user,/mob/living/carbon/brain))
+			to_chat(user,"You try to move, but you are not the pilot! The exosuit doesn't respond.")
+			return 0
 		user.forceMove(get_turf(src))
-		user << "You climb out from [src]"
+		to_chat(user,"You climb out from [src]")
 		return 0
 	if(connected_port)
 		if(world.time - last_message > 20)
@@ -686,6 +689,13 @@
 
 /obj/mecha/attackby(obj/item/weapon/W as obj, mob/user as mob)
 
+	if(istype(W, /obj/item/device/mmi))
+		if(mmi_move_inside(W,user))
+			to_chat(user,"[src]-MMI interface initialized successfuly")
+		else
+			to_chat(user,"[src]-MMI interface initialization failed.")
+		return
+
 	if(istype(W, /obj/item/mecha_parts/mecha_equipment))
 		var/obj/item/mecha_parts/mecha_equipment/E = W
 		spawn()
@@ -829,6 +839,70 @@
 	return
 */
 
+///////////////////////////////
+////////  Brain Stuff  ////////
+///////////////////////////////
+
+/obj/mecha/proc/mmi_move_inside(var/obj/item/device/mmi/mmi_as_oc as obj,mob/user as mob)
+	if(!mmi_as_oc.brainmob || !mmi_as_oc.brainmob.client)
+		to_chat(user,"Consciousness matrix not detected.")
+		return 0
+	else if(mmi_as_oc.brainmob.stat)
+		to_chat(user,"Brain activity below acceptable level.")
+		return 0
+	else if(occupant)
+		to_chat(user,"Occupant detected.")
+		return 0
+	else if(dna && dna!=mmi_as_oc.brainmob.dna.unique_enzymes)
+		to_chat(user,"Genetic sequence or serial number incompatible with locking mechanism.")
+		return 0
+	//Added a message here since people assume their first click failed or something./N
+//	user << "Installing MMI, please stand by."
+
+	visible_message("<span class='notice'>[usr] starts to insert a brain into [src.name]</span>")
+
+	if(enter_after(40,user))
+		if(!occupant)
+			return mmi_moved_inside(mmi_as_oc,user)
+		else
+			to_chat(user,"Occupant detected.")
+	else
+		to_chat(user,"You stop attempting to install the brain.")
+	return 0
+
+/obj/mecha/proc/mmi_moved_inside(var/obj/item/device/mmi/mmi_as_oc as obj,mob/user as mob)
+	if(mmi_as_oc && user in range(1))
+		if(!mmi_as_oc.brainmob || !mmi_as_oc.brainmob.client)
+			user << "Consciousness matrix not detected."
+			return 0
+		else if(mmi_as_oc.brainmob.stat)
+			user << "Beta-rhythm below acceptable level."
+			return 0
+		user.drop_from_inventory(mmi_as_oc)
+		var/mob/brainmob = mmi_as_oc.brainmob
+		brainmob.reset_view(src)
+	/*
+		brainmob.client.eye = src
+		brainmob.client.perspective = EYE_PERSPECTIVE
+	*/
+		occupant = brainmob
+		brainmob.loc = src //should allow relaymove
+		brainmob.canmove = 1
+		mmi_as_oc.loc = src
+		mmi_as_oc.mecha = src
+		src.verbs += /obj/mecha/verb/eject
+		src.Entered(mmi_as_oc)
+		src.Move(src.loc)
+		src.icon_state = src.reset_icon()
+		set_dir(dir_in)
+		src.log_message("[mmi_as_oc] moved in as pilot.")
+		if(!hasInternalDamage())
+			src.occupant << sound('sound/mecha/nominal.ogg',volume=50)
+		return 1
+	else
+		return 0
+
+
 /////////////////////////////////////
 ////////  Atmospheric stuff  ////////
 /////////////////////////////////////
@@ -1044,6 +1118,7 @@
 		src.occupant = H
 		src.add_fingerprint(H)
 		src.forceMove(src.loc)
+		src.verbs += /obj/mecha/verb/eject
 		src.log_append_to_last("[H] moved in as pilot.")
 		src.icon_state = src.reset_icon()
 		set_dir(dir_in)
@@ -1132,10 +1207,10 @@
 				occupant.loc = mmi
 			mmi.mecha = null
 			src.occupant.canmove = 0
-			src.verbs += /obj/mecha/verb/eject
 		src.occupant = null
 		src.icon_state = src.reset_icon()+"-open"
 		src.set_dir(dir_in)
+		src.verbs -= /obj/mecha/verb/eject
 	return
 
 /////////////////////////