Forgot the actual positronic brain file. Yay.

code/modules/mob/living/carbon/brain/posibrain.dm

@@ -0,0 +1,118 @@
+/obj/item/device/posibrain
+	name = "positronic brain"
+	desc = "A cube of shining metal, four inches to a side and covered in shallow grooves."
+	icon = 'icons/obj/assemblies.dmi'
+	icon_state = "posibrain"
+	w_class = 3
+	origin_tech = "engineering=4;materials=4;bluespace=2;programming=6"
+
+	var/list/construction_cost = list("metal"=500,"glass"=500,"silver"=200,"gold"=200,"plasma"=100,"diamond"=10)
+	var/construction_time = 75
+	var/searching = 0
+	var/askDelay = 10 * 60 * 1
+
+	req_access = list(access_robotics)
+	var/locked = 0
+	var/mob/living/carbon/brain/brainmob = null//The current occupant.
+	var/obj/mecha = null//This does not appear to be used outside of reference in mecha.dm.
+
+	attack_self(mob/user as mob)
+		if(!brainmob && searching == 0)
+			//Start the process of searching for a new user.
+			user << "\blue You carefully locate the manual activation switch and start the positronic brain's boot process."
+			icon_state = "posibrain-searching"
+			src.searching = 1
+			src.request_player()
+
+	proc/request_player()
+		for(var/mob/dead/observer/O in player_list)
+			if(jobban_isbanned(O, "pAI"))
+				continue
+			if(O.client)
+				if(O.client.be_pai)
+					question(O.client)
+
+	proc/question(var/client/C)
+		spawn(0)
+			if(!C)	return
+			var/response = alert(C, "Someone is requesting a personality for a positronic brain. Would you like to play as one?", "Positronic brain request", "Yes", "No", "Never for this round")
+			if(!C || brainmob)	return		//handle logouts that happen whilst the alert is waiting for a response, and responses issued after a brain has been located.
+			if(response == "Yes")
+				transfer_personality(C.mob)
+			else if (response == "Never for this round")
+				C.be_pai = 0
+
+
+	proc/transfer_personality(var/mob/candidate)
+
+		var/mob/living/carbon/brain/B = new(src)
+
+		src.searching = 0
+
+		src.brainmob = B
+		src.brainmob.mind = candidate.mind
+
+		src.brainmob.name = "PBU-[rand(100, 999)]"
+		src.brainmob.real_name = "PBU-[rand(100, 999)]"
+		src.brainmob.loc = src
+		src.brainmob.container = src
+		src.brainmob.stat = 0
+		src.brainmob.silent = 0
+		src.brainmob.brain_op_stage = 4.0
+		src.brainmob.key = candidate.key
+
+		dead_mob_list -= src.brainmob
+		living_mob_list += src.brainmob
+
+		var/turf/T = get_turf_or_move(src.loc)
+		for (var/mob/M in viewers(T))
+			M.show_message("\blue The positronic brain chimes quietly.")
+		icon_state = "posibrain-occupied"
+
+	proc/reset_search() //We give the players sixty seconds to decide, then reset the timer.
+
+		if(brainmob) return
+
+		src.searching = 0
+		icon_state = "posibrain"
+
+		var/turf/T = get_turf_or_move(src.loc)
+		for (var/mob/M in viewers(T))
+			M.show_message("\blue The positronic brain buzzes quietly, and the golden lights fade away. Perhaps you could try again?")
+
+/obj/item/device/posibrain/examine()
+
+	set src in oview()
+
+	if(!usr || !src)	return
+	if( (usr.sdisabilities & BLIND || usr.blinded || usr.stat) && !istype(usr,/mob/dead/observer) )
+		usr << "<span class='notice'>Something is there but you can't see it.</span>"
+		return
+
+	var/msg = "<span class='info'>*---------*\nThis is \icon[src] \a <EM>[src]</EM>!\n[desc]\n"
+	msg += "<span class='warning'>"
+
+	if(src.brainmob)
+		switch(src.brainmob.stat)
+			if(CONSCIOUS)
+				if(!src.brainmob.client)	msg += "It appears to be in stand-by mode.\n" //afk
+			if(UNCONSCIOUS)		msg += "<span class='warning'>It doesn't seem to be responsive.</span>\n"
+			if(DEAD)			msg += "<span class='deadsay'>It appears to be completely inactive.</span>\n"
+	else
+		msg += "[desc]\n"
+	msg += "*---------*</span>"
+	usr << msg
+	return
+
+/obj/item/device/posibrain/emp_act(severity)
+	if(!brainmob)
+		return
+	else
+		switch(severity)
+			if(1)
+				brainmob.emp_damage += rand(20,30)
+			if(2)
+				brainmob.emp_damage += rand(10,20)
+			if(3)
+				brainmob.emp_damage += rand(0,10)
+	..()