diff --git a/build.gradle b/build.gradle
index ee3e9504d..3001c6d25 100644
--- a/build.gradle
+++ b/build.gradle
@@ -286,7 +286,7 @@ minecraft {
     mappings = "stable_22"
 
     replace "@VERSION@", project.simpleVersion
-    replace "@MCVERSION@", config.minecraft.version
+    replace "/*@MCVERSIONDEP@*/", ", acceptedMinecraftVersions = \"[${config.minecraft.version},${config.minecraft.version}+)\""
 }
 
 processResources {
diff --git a/src/main/resources/assets/opencomputers/loot/openos/bin/cat.lua b/src/main/resources/assets/opencomputers/loot/openos/bin/cat.lua
index 8772e44e4..6a943ab78 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/bin/cat.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/bin/cat.lua
@@ -13,9 +13,14 @@ for i = 1, #args do
     io.stderr:write(string.format('cat %s: Is a directory\n', arg))
     ec = 1
   else
-    local file, reason = args[i] == "-" and io.stdin or io.open(shell.resolve(args[i]))
+    local file, reason
+    if args[i] == "-" then
+      file, reason = io.stdin, "missing stdin"
+    else
+      file, reason = io.open(shell.resolve(args[i]))
+    end
     if not file then
-      io.stderr:write(string.format("cat: %s: %s\n",args[i],tostring(reason)))
+      io.stderr:write(string.format("cat: %s: %s\n", args[i], tostring(reason)))
       ec = 1
     else
       repeat
diff --git a/src/main/resources/assets/opencomputers/loot/openos/bin/cp.lua b/src/main/resources/assets/opencomputers/loot/openos/bin/cp.lua
index 82be2fc9c..cd4c8401c 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/bin/cp.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/bin/cp.lua
@@ -148,12 +148,14 @@ end
 local to = shell.resolve(args[#args])
 
 for i = 1, #args - 1 do
-  local fromPath, cuts = args[i]:gsub("(/%.%.?)$", "%1")
-  fromPath = shell.resolve(fromPath)
+  local arg = args[i]
+  local fromPath = shell.resolve(arg)
+  -- a "contents of" copy is where src path ends in . or ..
+  -- a source path ending with . is not sufficient - could be the source filename
+  local contents_of = arg:match("%.$") and not fromPath:match("%.$")
   local toPath = to
-  -- fromPath ending with /. indicates copying the contents of fromPath
-  -- in which case (cuts>0) we do not append fromPath name to toPath 
-  if cuts == 0 and fs.isDirectory(toPath) then
+  -- we do not append fromPath name to toPath in case of contents_of copy
+  if not contents_of and fs.isDirectory(toPath) then
     toPath = fs.concat(toPath, fs.name(fromPath))
   end
   result, reason = recurse(fromPath, toPath)
diff --git a/src/main/resources/assets/opencomputers/loot/openos/bin/mkdir.lua b/src/main/resources/assets/opencomputers/loot/openos/bin/mkdir.lua
index 49fb40bc0..3e8376327 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/bin/mkdir.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/bin/mkdir.lua
@@ -19,7 +19,7 @@ for i = 1, #args do
         reason = "unknown reason"
       end
     end
-    io.stderr:write(path .. ": " .. reason .. "\n")
+    io.stderr:write("mkdir: cannot create directory '" .. tostring(args[i]) .. "': " .. reason .. "\n")
     ec = 1
   end
 end
diff --git a/src/main/resources/assets/opencomputers/loot/openos/bin/mktmp.lua b/src/main/resources/assets/opencomputers/loot/openos/bin/mktmp.lua
index d01ab987c..7e6327f3c 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/bin/mktmp.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/bin/mktmp.lua
@@ -1,12 +1,12 @@
 local fs = require("filesystem")
-local guid = require("guid")
+local uuid = require("uuid")
 local shell = require("shell")
 local sh = require("sh")
 
 local touch = loadfile(shell.resolve("touch", "lua"))
 local mkdir = loadfile(shell.resolve("mkdir", "lua"))
 
-if not guid or not touch then
+if not uuid or not touch then
   local errorMessage = "missing tools for mktmp"
   io.stderr:write(errorMessage .. '\n')
   return false, errorMessage
@@ -58,7 +58,7 @@ if not fs.exists(prefix) then
 end
 
 while true do
-  local tmp = prefix .. guid.next()
+  local tmp = prefix .. uuid.next()
   if not fs.exists(tmp) then
 
     local ok, reason
diff --git a/src/main/resources/assets/opencomputers/loot/openos/boot/10_devfs.lua b/src/main/resources/assets/opencomputers/loot/openos/boot/10_devfs.lua
index 0da8de199..3cb2c8604 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/boot/10_devfs.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/boot/10_devfs.lua
@@ -1,6 +1,7 @@
 require("filesystem").mount(
 setmetatable({
-  isReadOnly = function()return false end
+  isReadOnly = function()return false end,
+  address = require("uuid").next()
 },
 {
   __index=function(tbl,key)return require("devfs")[key]end
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/devfs.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/devfs.lua
index bee88b701..8848173cf 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/lib/devfs.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/devfs.lua
@@ -1,111 +1,292 @@
 local fs = require("filesystem")
+local comp = require("component")
 
-local proxy = {points={},address=require("guid").next()}
+local function new_node(parent, name, is_dir, proxy)
+  local node = {parent=parent, name=name, is_dir=is_dir, proxy=proxy}
+  if not proxy then
+    node.children = {}
+  end
+  return node
+end
 
-local nop = function()end
+local function new_devfs_dir(name)
+  local sys = {}
+  sys.mtab = new_node(nil, name or "/", true)
 
-function proxy.getLabel()
+  -- returns: dir, point or path
+  -- node (table): the handler responsible for the path
+  --   this is essentially the device filesystem that is registered for the given path
+  -- point (string): the point name (like a file name)
+  function sys.findNode(path, create)
+    checkArg(1, path, "string")
+    local segments = fs.segments(path)
+    local node = sys.mtab
+    while #segments > 0 do
+      local name = table.remove(segments, 1)
+      local prev_path = path
+      path = table.concat(segments, "/")
+
+      if not node.children[name] then
+        if not create then
+          path = prev_path
+          break
+        end
+        node.children[name] = new_node(node, name, true, false)
+      end
+
+      node = node.children[name]
+
+      if node.proxy then -- if there is a proxy handler we stop searching here
+        break
+      end
+    end
+
+    -- only dirs can have trailing path
+    -- trailing path on a dev point (file) not allowed
+    if path == "" or node.is_dir and node.proxy then
+      return node, path
+    end
+  end
+
+  function sys.invoke(method, path, ...)
+    local node, rest = sys.findNode(path)
+    if not node or -- not found
+       rest == "" and node.is_dir or -- path is dir
+       not node.proxy[method] then -- optional method
+      return 0
+    end
+    -- proxy could be a file, which doesn't take an argument, but it can be ignored if passed
+    return node.proxy[method](rest)
+  end
+
+  function sys.size(path)
+    return sys.invoke("size", path)
+  end
+
+  function sys.lastModified(path)
+    return sys.invoke("lastModified", path)
+  end
+
+  function sys.isDirectory(path)
+    local node, rest = sys.findNode(path)
+    if not node then
+      return
+    end
+
+    if rest == "" then
+      return node.is_dir
+    elseif node.proxy then
+      return node.proxy.isDirectory(rest)
+    end
+  end
+
+  function sys.open(path, mode)
+    checkArg(1, path, "string")
+    checkArg(2, mode, "string", "nil")
+
+    if not sys.exists(path) then
+      return nil, path.." file not found"
+    elseif sys.isDirectory(path) then
+      return nil, path.." is a directory"
+    end
+
+    mode = mode or "r"
+    -- everything at this level should be a binary open
+    mode = mode:gsub("b", "")
+
+    if not ({a=true,w=true,r=true})[mode] then
+      return nil, "invalid mode"
+    end
+
+    local node, rest = sys.findNode(path)
+    -- there must be a node, else exists would have failed
+
+    local args = {}
+    if rest ~= "" then
+      -- having more rest means we expect the proxy fs to open the point
+      args[1] = rest
+    end
+    args[#args+1] = mode
+
+    return node.proxy.open(table.unpack(args))
+  end
+
+  function sys.list(path)
+    local node, rest = sys.findNode(path)
+    if not node or (rest ~= "" and not node.is_dir) then-- not found
+      return {}
+    elseif rest == "" and not node.is_dir then -- path is file
+      return {path}
+    elseif node.proxy then
+      -- proxy could be a file, which doesn't take an argument, but it can be ignored if passed
+      return node.proxy.list(rest)
+    end
+
+    -- rest == "" and node.is_dir
+    local keys = {}
+    for k in pairs(node.children) do
+      table.insert(keys, k)
+    end
+    return keys
+  end
+
+  function sys.remove(path)
+    checkArg(1, path, "string")
+
+    if path == "" then
+      return nil, "no such file or directory"
+    end
+
+    if not sys.exists(path) then
+      return nil, path.." file not found"
+    end
+
+    local node, rest = sys.findNode(path)
+
+    if rest ~= "" then -- if rest is not resolved, this isn't our path
+      return node.proxy.remove(rest)
+    end
+
+    node.parent.children[node.name] = nil
+  end
+
+  function sys.exists(path)
+    checkArg(1, path, "string")
+    local node, rest = sys.findNode(path)
+
+    if not node then
+      return false
+    elseif rest == "" then
+      return true
+    else
+      return node.proxy.exists(rest)
+    end
+  end
+
+  function sys.create(path, handler)
+    if sys.exists(path) then
+      return nil, "path already exists"
+    end
+
+    local segments = fs.segments(path)
+    local target = table.remove(segments)
+    path = table.concat(segments, "/")
+
+    if not target or target == "" then
+      return nil, "missing argument"
+    end
+
+    local node, rest = sys.findNode(path, true)
+    if rest ~= "" then
+      return node.proxy.create(rest, handler)
+    end
+    node.children[target] = new_node(node, target, not not handler.list, handler)
+    return true
+  end
+
+  return sys
+end
+
+local devfs = new_devfs_dir()
+
+local bfd = "bad file descriptor"
+
+function devfs.getLabel()
   return "devfs"
 end
 
-function proxy.setLabel(value)
+function devfs.setLabel(value)
   error("drive does not support labeling")
 end
 
-function proxy.spaceTotal()
+function devfs.spaceTotal()
   return 0
 end
 
-function proxy.spaceUsed()
+function devfs.spaceUsed()
   return 0
 end
 
-function proxy.exists(path)
-  return not not proxy.points[path]
+function devfs.makeDirectory(path)
+  return false, "to create dirs in devfs use devfs.create"
 end
 
-function proxy.size(path)
-  return 0
-end
-
-function proxy.isDirectory(path)
-  return false
-end
-
-function proxy.lastModified(path)
-  return fs.lastModified("/dev/")
-end
-
-function proxy.list()
-  local keys = {}
-  for k,v in pairs(proxy.points) do
-    table.insert(keys, k)
-  end
-  return keys
-end
-
-function proxy.makeDirectory(path)
-  return false
-end
-
-function proxy.remove(path)
-  if not proxy.exists(path) then return false end
-  proxy.points[path] = nil
-  return true
-end
-
-function proxy.rename(from, to)
-  return false
-end
-
-proxy.close = nop
-
-function proxy.open(path, mode)
-  checkArg(1, path, "string")
-
-  local handle = proxy.points[path]
-  if not handle then return nil, "device point [" .. path .. "] does not exist" end
-
-  local msg = "device point [" .. path .. "] cannot be opened for "
-
-  if mode == "r" then
-    if not handle.read then
-      return nil, msg .. "read"
-    end
-  else
-    if not handle.write then
-      return nil, msg .. "write"
-    end
-  end
-
-  return handle
-end
-
-function proxy.read(h,...)
+function devfs.read(h,...)
+  if not h.read then return nil, bfd end
   return h:read(...)
 end
 
-function proxy.seek(h,...)
+function devfs.seek(h,...)
+  if not h.seek then return nil, bfd end
   return h:seek(...)
 end
 
-function proxy.write(h,...)
+function devfs.write(h,...)
+  if not h.write then return nil, bfd end
   return h:write(...)
 end
 
-function proxy.create(path, handle)
-  handle.close = handle.close or nop
-  proxy.points[path] = handle
-  return true
+function devfs.close(h, ...)
+  if not h.close then return nil, bfd end
+  return h:close(...)
 end
 
-proxy.create("null", {write = nop})
-proxy.create("random", {read = function(_,n)
-  local chars = {}
-  for i=1,n do
-    table.insert(chars,string.char(math.random(0,255)))
-  end
-  return table.concat(chars)
-end})
+-- devfs.create creates a new dev point at path
+-- devfs is mounted to /sys by default, and /dev is a symlink to /sys/dev. If you want a devfs point to show up in /dev, specify a path here as "/dev/your_path")
+-- the handler can be a single file dev file (called a point), or a devfs dir [which allows it to list its own dynamic list of points and dirs]
+-- note: devfs dirs that list their own child dirs will have to handle directory queries on their own, such as list() and open(path, mode)
 
-return proxy
+-- A handler represents a directory IF it defines list(), which returns a string array of the point names
+-- a directory handler acts like simplified filesystem of its own.
+-- note: that when creating new devfs points or dirs, devfs.create will not traverse into dynamic directory children of dev mount points
+-- Meaning, if you create a devfs dir, which returns dirs children of its own, devfs.create does not support creating dev points
+-- on those children
+
+-- see new_devfs_dir() -- it might work for you, /dev uses it
+
+-- Also note, your own devfs dirs may implement open() however they like -- devfs points' open() is called by the devfs library but dynamic
+-- dir act as their own library for their own points
+
+-- ### devfs point methods ###
+-- Required
+  -- open(mode: string []) file: returns new file handle for point (see "devfs point handle methods")
+-- Optional
+  -- size(path) number
+
+-- ### devfs point handle instance methods ###
+-- Required
+  -- + technicaly, one of the following is not required when the mode is for the other (e.g. no read when in write mode)
+  -- write(self, value, ...) boolean: writes each value (params list) and returns success
+  -- read(self, n: number) string: return string of n bytes, nil when no more bytes available
+-- Optional
+  -- seek(self, whence [string], offset [number]) number: move file handle from whence by offset, return offset result
+  -- close(self) boolean: close the file handle. Note that if your open method allocated resources, you'll need to release them in close
+
+-- ### devfs dir methods ###
+-- Required
+  -- list() string[]: return list of child point names
+    -- if you use new_devfs_dir, set metatable on .points with __pairs and __index if you want a dynamic list of files
+  -- open(path, mode) file (table): return a file handle to path (path is relative)
+    -- it would be nice to make open() optional, but devfs doesn't know where you might store your point handlers, if you even have any
+-- Optional
+  -- size(path) number
+  -- lastModified(path) number
+  -- isDirectory(path) boolean -- default returns false. Having dynamic dirs is considered advanced
+  -- remove(path) boolean
+  -- rename(path) boolean
+  -- exists(path) boolean -- default checks path against list() results
+
+-- /dev is a special handler
+
+local function devfs_load(key)
+  return require("tools/devfs/" .. key)
+end
+
+devfs.create("null", devfs_load("null"))
+devfs.create("random", devfs_load("random"))
+if comp.isAvailable("eeprom") then
+  devfs.create("eeprom", devfs_load("eeprom"))
+  devfs.create("eeprom-data", devfs_load("eeprom-data"))
+end
+
+return devfs
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/filesystem.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/filesystem.lua
index ea6896f67..f46c8212a 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/lib/filesystem.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/filesystem.lua
@@ -112,9 +112,7 @@ function filesystem.setAutorunEnabled(value)
   saveConfig()
 end
 
-function filesystem.segments(path)
-  return segments(path)
-end
+filesystem.segments = segments
 
 function filesystem.canonical(path)
   local result = table.concat(segments(path), "/")
@@ -367,7 +365,11 @@ function filesystem.makeDirectory(path)
   end
   local node, rest = findNode(path)
   if node.fs and rest then
-    return node.fs.makeDirectory(rest)
+    local success, reason = node.fs.makeDirectory(rest)
+    if not success and not reason and node.fs.isReadOnly() then
+      reason = "filesystem is readonly"
+    end
+    return success, reason
   end
   if node.fs then
     return nil, "virtual directory with that name already exists"
@@ -502,11 +504,12 @@ function filesystem.open(path, mode)
   checkArg(1, path, "string")
   mode = tostring(mode or "r")
   checkArg(2, mode, "string")
+
   assert(({r=true, rb=true, w=true, wb=true, a=true, ab=true})[mode],
     "bad argument #2 (r[b], w[b] or a[b] expected, got " .. mode .. ")")
 
   local node, rest = findNode(path)
-  if not node.fs or not rest then
+  if not node.fs or not rest or (({r=true,rb=true})[mode] and not node.fs.exists(rest)) then
     return nil, "file not found"
   end
 
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/guid.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/guid.lua
deleted file mode 100644
index 13cfc7217..000000000
--- a/src/main/resources/assets/opencomputers/loot/openos/lib/guid.lua
+++ /dev/null
@@ -1,47 +0,0 @@
-local guid = {}
-
-function guid.toHex(n)
-  if type(n) ~= 'number' then
-    return nil, string.format("toHex only converts numbers to strings, %s is not a string, but a %s", tostring(n), type(n))
-  end
-  if n == 0 then
-    return '0'
-  end
-
-  local hexchars = "0123456789abcdef"
-  local result = ""
-  local prefix = "" -- maybe later allow for arg to request 0x prefix
-  if n < 0 then
-    prefix = "-"
-    n = -n
-  end
-
-  while n > 0 do
-    local next = math.floor(n % 16) + 1 -- lua has 1 based array indices
-    n = math.floor(n / 16)
-    result = hexchars:sub(next, next) .. result
-  end
-
-  return prefix .. result
-end
-
-function guid.next()
-  -- e.g. 3c44c8a9-0613-46a2-ad33-97b6ba2e9d9a
-  -- 8-4-4-4-12
-  local sets = {8, 4, 4, 4, 12}
-  local result = ""
-
-  local i
-  for _,set in ipairs(sets) do
-    if result:len() > 0 then
-      result = result .. "-"
-    end
-    for i = 1,set do
-      result = result .. guid.toHex(math.random(0, 15))
-    end
-  end
-
-  return result
-end
-
-return guid
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/sh.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/sh.lua
index 159e9072d..bb90f56d4 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/lib/sh.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/sh.lua
@@ -454,7 +454,7 @@ function --[[@delayloaded-start@]] sh.internal.glob(glob_pattern)
 
   local function magical(s)
     for _,glob_rule in ipairs(sh.internal.globbers) do
-      if s:match("[^%%]-"..text.escapeMagic(glob_rule[2])) then
+      if (" "..s):match("[^%%]"..text.escapeMagic(glob_rule[2])) then
         return true
       end
     end
@@ -464,7 +464,6 @@ function --[[@delayloaded-start@]] sh.internal.glob(glob_pattern)
   local root = is_abs and '' or shell.getWorkingDirectory():gsub("([^/])$","%1/")
   local paths = {is_abs and "/" or ''}
   local relative_separator = ''
-
   for i,segment in ipairs(segments) do
     local enclosed_pattern = string.format("^(%s)/?$", segment)
     local next_paths = {}
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/term.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/term.lua
index fed3a783c..35770953d 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/lib/term.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/term.lua
@@ -243,14 +243,17 @@ function term.readKeyboard(ops)
   end
 
   while true do
-    local killed, name, address, char, code = term.internal.pull(input)
+    local ok, name, address, char, code = term.internal.pull(input)
+    if not term.isAvailable() then
+      return
+    end
     -- we have to keep checking what kb is active in case it is switching during use
     -- we could have multiple screens, each with keyboards active
     local main_kb = term.keyboard(w)
     local main_sc = term.screen(w)
-    local c = nil
+    local c
     local backup_cache = hints.cache
-    if name == "interrupted" or name == "term_unavailable" then
+    if name == "interrupted" then
       draw("^C\n",true)
       return ""
     elseif address == main_kb or address == main_sc then
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/text.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/text.lua
index 3556923b6..353efb132 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/lib/text.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/text.lua
@@ -288,4 +288,93 @@ function --[[@delayloaded-start@]] text.internal.normalize(words, omitQuotes)
   return norms
 end --[[@delayloaded-end@]]
 
+function --[[@delayloaded-start@]] text.internal.seeker(handle, whence, to)
+  if not handle.txt then
+    return nil, "bad file descriptor"
+  end
+  to = to or 0
+  if whence == "cur" then
+    handle.offset = handle.offset + to
+  elseif whence == "set" then
+    handle.offset = to
+  elseif whence == "end" then
+    handle.offset = handle.len + to
+  end
+  handle.offset = math.max(0, math.min(handle.offset, handle.len))
+  return handle.offset
+end --[[@delayloaded-end@]]
+
+function --[[@delayloaded-start@]] text.internal.reader(txt)
+  checkArg(1, txt, "string")
+  local reader =
+  {
+    txt = txt,
+    len = unicode.len(txt),
+    offset = 0,
+    read = function(_, n)
+      checkArg(1, n, "number")
+      if not _.txt then
+        return nil, "bad file descriptor"
+      end
+      if _.offset >= _.len then
+        return nil
+      end
+      local last_offset = _.offset
+      _:seek("cur", n)
+      local next = unicode.sub(_.txt, last_offset + 1, _.offset)
+      return next
+    end,
+    seek = text.internal.seeker,
+    close = function(_)
+      if not _.txt then
+        return nil, "bad file descriptor"
+      end
+      _.txt = nil
+      return true
+    end,
+  }
+
+  return reader
+end --[[@delayloaded-end@]]
+
+function --[[@delayloaded-start@]] text.internal.writer(ostream, append_txt)
+  if type(ostream) == "table" then
+    local mt = getmetatable(ostream) or {}
+    checkArg(1, mt.__call, "function")
+  end
+  checkArg(1, ostream, "function", "table")
+  checkArg(2, append_txt, "string", "nil")
+  local writer =
+  {
+    txt = "",
+    offset = 0,
+    len = 0,
+    write = function(_, ...)
+      if not _.txt then
+        return nil, "bad file descriptor"
+      end
+      local pre, vs, pos = unicode.sub(_.txt, 1, _.offset), {}, unicode.sub(_.txt, _.offset + 1)
+      for i,v in ipairs({...}) do
+        table.insert(vs, v)
+      end
+      vs = table.concat(vs)
+      _:seek("cur", unicode.len(vs))
+      _.txt = pre .. vs .. pos
+      _.len = unicode.len(_.txt)
+      return true
+    end,
+    seek = text.internal.seeker,
+    close = function(_)
+      if not _.txt then
+        return nil, "bad file descriptor"
+      end
+      ostream((append_txt or "") .. _.txt)
+      _.txt = nil
+      return true
+    end,
+  }
+
+  return writer
+end --[[@delayloaded-end@]]
+
 return text, local_env
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/eeprom-data.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/eeprom-data.lua
new file mode 100644
index 000000000..2aea1a0ef
--- /dev/null
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/eeprom-data.lua
@@ -0,0 +1,19 @@
+local comp = require("component")
+local text = require("text")
+
+if not comp.isAvailable("eeprom") then
+  return nil
+end
+
+return
+{
+  open = function(mode)
+    if ({r=true, rb=true})[mode] then
+      return text.internal.reader(comp.eeprom.getData())
+    end
+    return text.internal.writer(comp.eeprom.setData, ({a=true,ab=true})[mode] and comp.eeprom.getData())
+  end,
+  size = function()
+    return string.len(comp.eeprom.getData())
+  end
+}
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/eeprom.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/eeprom.lua
new file mode 100644
index 000000000..dbc9ceafb
--- /dev/null
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/eeprom.lua
@@ -0,0 +1,19 @@
+local comp = require("component")
+local text = require("text")
+
+if not comp.isAvailable("eeprom") then
+  return nil
+end
+
+return
+{
+  open = function(mode)
+    if ({r=true, rb=true})[mode] then
+      return text.internal.reader(comp.eeprom.get())
+    end
+    return text.internal.writer(comp.eeprom.set, ({a=true,ab=true})[mode] and comp.eeprom.get())
+  end,
+  size = function()
+    return string.len(comp.eeprom.get())
+  end
+}
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/null.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/null.lua
new file mode 100644
index 000000000..c3710917a
--- /dev/null
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/null.lua
@@ -0,0 +1,12 @@
+return
+{
+  open = function(mode)
+    if not mode or not mode:match("[wa]") then
+      return nil, "write only"
+    end
+    return
+    {
+      write = function() end
+    }
+  end
+}
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/random.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/random.lua
new file mode 100644
index 000000000..15c08617a
--- /dev/null
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/devfs/random.lua
@@ -0,0 +1,21 @@
+return
+{
+  open = function(mode)
+    if mode and not mode:match("r") then
+      return nil, "read only"
+    end
+    return
+    {
+      read = function(self, n)
+        local chars = {}
+        for i=1,n do
+          table.insert(chars,string.char(math.random(0,255)))
+        end
+        return table.concat(chars)
+      end
+    }
+  end,
+  size = function()
+    return math.huge
+  end
+}
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/tools/install_basics.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/install_basics.lua
index eaa2c8591..bd4188080 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/lib/tools/install_basics.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/install_basics.lua
@@ -171,16 +171,11 @@ options.setboot    = source.prop.setboot and not options.nosetboot
 options.reboot     = source.prop.reboot and not options.noreboot
 options.source_dir = fs.canonical(source.prop.fromDir or options.fromDir or "") .. '/.'
 
-local installer_path = options.source_root .. "/.install"
-if fs.exists(installer_path) then
-  os.exit(loadfile("/lib/tools/install_utils.lua", "bt", _G)('install', options))
-end
-
 local cp_args =
 {
   "-vrx" .. (options.update and "ui" or ""),
   options.source_root .. options.source_dir,
-  options.target_root .. options.target_dir
+  options.target_root:gsub("//","/") .. options.target_dir
 }
 
 local source_display = (source.prop or {}).label or source.dev.getLabel() or source.path
@@ -194,6 +189,11 @@ if not ((io.read() or "n").."y"):match("^%s*[Yy]") then
   os.exit()
 end
 
+local installer_path = options.source_root .. "/.install"
+if fs.exists(installer_path) then
+  os.exit(loadfile("/lib/tools/install_utils.lua", "bt", _G)('install', options))
+end
+
 return
 {
   setlabel = options.setlabel,
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/tools/install_utils.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/install_utils.lua
index cbaae9a70..af48bef83 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/lib/tools/install_utils.lua
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/tools/install_utils.lua
@@ -41,18 +41,18 @@ end
 if cmd == 'select' then
   if #options.sources == 0 then
     if options.source_label then
-      io.stderr:write("No install source matched given label: " .. options.source_label .. '\n')
+      io.stderr:write("Nothing to install labeled: " .. options.source_label .. '\n')
     elseif options.from then
-      io.stderr:write("No install source found: " .. options.from .. '\n')
+      io.stderr:write("Nothing to install from: " .. options.from .. '\n')
     else
-      io.stderr:write("Could not find any available installations\n")
+      io.stderr:write("Nothing to install\n")
     end
     os.exit(1)
   end
 
   if #options.targets == 0 then
     if options.to then
-      io.stderr:write("No such filesystem to install to: " .. options.to .. '\n')
+      io.stderr:write("No such target to install to: " .. options.to .. '\n')
     else
       io.stderr:write("No writable disks found, aborting\n")
     end
diff --git a/src/main/resources/assets/opencomputers/loot/openos/lib/uuid.lua b/src/main/resources/assets/opencomputers/loot/openos/lib/uuid.lua
new file mode 100644
index 000000000..ffee13682
--- /dev/null
+++ b/src/main/resources/assets/opencomputers/loot/openos/lib/uuid.lua
@@ -0,0 +1,22 @@
+local uuid = {}
+
+function uuid.next()
+  -- e.g. 3c44c8a9-0613-46a2-ad33-97b6ba2e9d9a
+  -- 8-4-4-4-12 (halved sizes because bytes make hex pairs)
+  local sets = {4, 2, 2, 2, 6}
+  local result = ""
+
+  local i
+  for _,set in ipairs(sets) do
+    if result:len() > 0 then
+      result = result .. "-"
+    end
+    for i = 1,set do
+      result = result .. string.format("%02x", math.random(0, 255))
+    end
+  end
+
+  return result
+end
+
+return uuid
diff --git a/src/main/resources/assets/opencomputers/loot/openos/usr/man/install b/src/main/resources/assets/opencomputers/loot/openos/usr/man/install
index 45c3ab25a..03f89af0a 100644
--- a/src/main/resources/assets/opencomputers/loot/openos/usr/man/install
+++ b/src/main/resources/assets/opencomputers/loot/openos/usr/man/install
@@ -9,10 +9,10 @@ DESCRIPTION
 
 OPTIONS
   --from=ADDR
-    Specifies the source filesystem or its root path. ADDR can be the device guid or a directory path. If this is a directory path, it represents a root path to install from. This option can also be used to specify source paths that would otherwise be ignored, those being devfs, tmpfs, and the rootfs. e.g. --from=/tmp . Note that if both --from and a [name] is given, install expects the source path to have a .prop defining the same name. See .prop for more details.
+    Specifies the source filesystem or its root path. ADDR can be the device uuid or a directory path. If this is a directory path, it represents a root path to install from. This option can also be used to specify source paths that would otherwise be ignored, those being devfs, tmpfs, and the rootfs. e.g. --from=/tmp . Note that if both --from and a [name] is given, install expects the source path to have a .prop defining the same name. See .prop for more details.
 
   --to=ADDR
-    Same as --from but specifies the target filesystem by guid or its root path. This option can also be used to specify filesystems that are otherwise ignored including tmpfs. i.e. --to=ADDR where ADDR matches the tmpfs device address or its mount point path. e.g. --to=/tmp
+    Same as --from but specifies the target filesystem by uuid or its root path. This option can also be used to specify filesystems that are otherwise ignored including tmpfs. i.e. --to=ADDR where ADDR matches the tmpfs device address or its mount point path. e.g. --to=/tmp
 
   --fromDir=PATH
     Install PATH from source. PATH is relative to the root of the source filesystem or path given by --from. The default is .
diff --git a/src/main/resources/assets/opencomputers/recipes/default.recipes b/src/main/resources/assets/opencomputers/recipes/default.recipes
index 66af1dc68..7a9c4ad46 100644
--- a/src/main/resources/assets/opencomputers/recipes/default.recipes
+++ b/src/main/resources/assets/opencomputers/recipes/default.recipes
@@ -302,7 +302,7 @@ leashUpgrade {
 }
 navigationUpgrade {
   input: [[ingotGold, compass, ingotGold]
-          ["oc:circuitChip2", {item=map, subID=any}, "oc:circuitChip2"]
+          ["oc:circuitChip2", {item=filled_map, subID=any}, "oc:circuitChip2"]
           [ingotGold, potion, ingotGold]]
 }
 pistonUpgrade {
diff --git a/src/main/resources/assets/opencomputers/recipes/gregtech.recipes b/src/main/resources/assets/opencomputers/recipes/gregtech.recipes
index 283d2ee13..2de98266a 100644
--- a/src/main/resources/assets/opencomputers/recipes/gregtech.recipes
+++ b/src/main/resources/assets/opencomputers/recipes/gregtech.recipes
@@ -144,7 +144,7 @@ generatorUpgrade {
 navigationUpgrade {
   # 2 = MV Casing
   input: [[{block="gt.blockcasings", subID=2}, compass, screwStainlessSteel]
-          ["oc:circuitChip3", {item=map, subID=any}, "oc:circuitChip3"]
+          ["oc:circuitChip3", {item=filled_map, subID=any}, "oc:circuitChip3"]
           [screwStainlessSteel, potion, craftingToolScrewdriver]]
 }
 signUpgrade {
@@ -341,4 +341,4 @@ screen3 {
   input: [[plateTitanium, "oc:materialCircuitBoardPrinted", craftingToolWrench]
           ["oc:circuitChip3", "oc:screen2", "oc:circuitChip3"]
           [plateTitanium, "oc:materialCircuitBoardPrinted", craftingToolScrewdriver]]
-}
\ No newline at end of file
+}
diff --git a/src/main/resources/assets/opencomputers/recipes/hardmode.recipes b/src/main/resources/assets/opencomputers/recipes/hardmode.recipes
index a7485dcb1..ff093d2cc 100644
--- a/src/main/resources/assets/opencomputers/recipes/hardmode.recipes
+++ b/src/main/resources/assets/opencomputers/recipes/hardmode.recipes
@@ -169,7 +169,7 @@ inventoryControllerUpgrade {
 }
 navigationUpgrade {
   input: [[ingotGold, compass, ingotGold]
-          ["oc:circuitChip3", {item=map, subID=any}, "oc:circuitChip3"]
+          ["oc:circuitChip3", {item=filled_map, subID=any}, "oc:circuitChip3"]
           [ingotGold, potion, ingotGold]]
 }
 signUpgrade {
diff --git a/src/main/scala/li/cil/oc/OpenComputers.scala b/src/main/scala/li/cil/oc/OpenComputers.scala
index 8cd5866c2..3b3c79b5e 100644
--- a/src/main/scala/li/cil/oc/OpenComputers.scala
+++ b/src/main/scala/li/cil/oc/OpenComputers.scala
@@ -14,7 +14,7 @@ import org.apache.logging.log4j.Logger
 
 @Mod(modid = OpenComputers.ID, name = OpenComputers.Name,
   version = OpenComputers.Version,
-  modLanguage = "scala", useMetadata = true, acceptedMinecraftVersions = "[@MCVERSION@,@MCVERSION@+)")
+  modLanguage = "scala", useMetadata = true /*@MCVERSIONDEP@*/)
 object OpenComputers {
   final val ID = "OpenComputers"