diff --git a/atlas_os/CMC.lua b/atlas_os/CMC.lua
new file mode 100644
index 0000000..2ce4433
--- /dev/null
+++ b/atlas_os/CMC.lua
@@ -0,0 +1,236 @@
+-- CMC.lua — Command Controller (AtlasOS Shell/CPU v2.0)
+-- in[1]  = cmd_rx  ← IOC.out[4] (IN|command)
+-- in[2]  = mem_rx  ← MMC.out[1] (FS response)
+-- out[1] = text_tx → IOC.in[2] (OUT|text)
+-- out[2] = clear_tx → IOC.in[3] (1 = clear)
+-- out[3] = color_tx → IOC.in[4] (R,G,B)
+-- out[4] = mem_tx  → MMC.in[1] (FS request)
+
+local state = 0
+local ST_IDLE = 0
+local ST_WAIT_FS = 1
+
+local uid, gid, cwd, curUser = 0, 0, "/", "root"
+
+local pendingCmd = nil
+local lastRespSeq = 0
+
+local function parseMsg(msg)
+  local p = msg:find("|")
+  return p and msg:sub(1, p - 1) or msg, p and msg:sub(p + 1) or nil
+end
+
+local function printOut(t)
+  out[1] = "OUT|" .. tostring(t)
+end
+
+local function printErr(t)
+  out[1] = "OUT|" .. tostring(t)
+end
+
+local function doClear()
+  out[2] = 1
+end
+
+local function doColor(r, g, b)
+  out[3] = r .. "," .. g .. "," .. b
+end
+
+local function fsReq(op, arg)
+  local msg = op
+  if arg then msg = msg .. "|" .. arg end
+  out[4] = msg
+end
+
+local cmds = {}
+
+local function reg(name, fn, desc)
+  cmds[name] = { fn = fn, desc = desc }
+end
+
+reg("help", function(a)
+  local t = "AtlasOS v2.0 commands:\n"
+  for n, e in pairs(cmds) do
+    t = t .. "  " .. n .. "  " .. e.desc .. "\n"
+  end
+  return t
+end, "Show help")
+
+reg("echo", function(a)
+  if #a == 0 then error("echo: missing text") end
+  return table.concat(a, " ")
+end, "Echo text")
+
+reg("clear", function(a)
+  doClear()
+end, "Clear screen")
+
+reg("color", function(a)
+  if #a < 3 then error("color: need R G B") end
+  local r, g, b = tonumber(a[1]), tonumber(a[2]), tonumber(a[3])
+  if not (r and g and b) then error("color: invalid values") end
+  r = math.floor(math.max(0, math.min(255, r)))
+  g = math.floor(math.max(0, math.min(255, g)))
+  b = math.floor(math.max(0, math.min(255, b)))
+  doColor(r, g, b)
+  printOut("Color set to " .. r .. "," .. g .. "," .. b)
+end, "Set color R G B")
+
+reg("status", function(a)
+  return "AtlasOS v2.0 | User: " .. curUser .. "(" .. uid .. ") | CWD: " .. cwd
+end, "System status")
+
+reg("ls", function(a)
+  local path = cwd
+  local opts = {}
+  for i = 1, #a do
+    if a[i]:sub(1, 1) == "-" then
+      opts[a[i]] = true
+    else
+      path = a[i]
+    end
+  end
+  pendingCmd = { name = "ls", path = path, opts = opts }
+  state = ST_WAIT_FS
+  fsReq("LS", path)
+end, "List directory [path]")
+
+reg("cat", function(a)
+  if #a == 0 then error("cat: missing path") end
+  pendingCmd = { name = "cat", path = a[1] }
+  state = ST_WAIT_FS
+  fsReq("READ", a[1] .. "|0|8192")
+end, "Show file content")
+
+reg("cd", function(a)
+  local path = a[1]
+  if not path then path = "/" end
+  pendingCmd = { name = "cd", path = path }
+  state = ST_WAIT_FS
+  fsReq("CHDIR", path)
+end, "Change directory [path]")
+
+reg("stat", function(a)
+  if #a == 0 then error("stat: missing path") end
+  pendingCmd = { name = "stat", path = a[1] }
+  state = ST_WAIT_FS
+  fsReq("STAT", a[1])
+end, "Show file metadata")
+
+local function execCmd(cmdStr)
+  local parts = {}
+  for t in cmdStr:gmatch("%S+") do
+    parts[#parts + 1] = t
+  end
+  if #parts == 0 then return end
+
+  local name = parts[1]
+  local args = {}
+  for i = 2, #parts do
+    args[#args + 1] = parts[i]
+  end
+
+  local entry = cmds[name]
+  if not entry then
+    printErr("Unknown: " .. name .. ". Try 'help'.")
+    return
+  end
+
+  local ok, result = pcall(entry.fn, args)
+  if not ok then
+    printErr(tostring(result))
+  elseif result ~= nil then
+    printOut(result)
+  end
+end
+
+local function handleFSResponse(op, data)
+  if not pendingCmd then return end
+  local cmd = pendingCmd
+
+  if op == "ERR" then
+    local code = data or "EIO"
+    if code == "ENOENT" then
+      printErr(cmd.path .. ": No such file or directory")
+    elseif code == "EACCES" then
+      printErr(cmd.path .. ": Permission denied")
+    elseif code == "ENOTDIR" then
+      printErr(cmd.path .. ": Not a directory")
+    elseif code == "EISDIR" then
+      printErr(cmd.path .. ": Is a directory")
+    else
+      printErr(cmd.path .. ": " .. code)
+    end
+    pendingCmd = nil
+    state = ST_IDLE
+    return
+  end
+
+  if cmd.name == "ls" then
+    local showAll = (cmd.opts["-la"] or cmd.opts["-a"])
+    local names = {}
+    for n in data:gmatch("([^|]+)") do
+      names[#names + 1] = n
+    end
+    local outLines = {}
+    for _, n in ipairs(names) do
+      if n ~= "." and n ~= ".." or showAll then
+        outLines[#outLines + 1] = n
+      end
+    end
+    if #outLines == 0 then outLines[1] = "(empty)" end
+    printOut(table.concat(outLines, "\n"))
+  elseif cmd.name == "cat" then
+    printOut(data)
+  elseif cmd.name == "cd" then
+    cwd = data
+    printOut(cwd)
+  elseif cmd.name == "stat" then
+    local parts = {}
+    for s in data:gmatch("([^|]+)") do
+      parts[#parts + 1] = s
+    end
+    if #parts >= 6 then
+      local typ = parts[2] == "d" and "directory" or "file"
+      local out = "Inode: " .. parts[1] .. "  Type: " .. typ .. "\n"
+      out = out .. "Mode: " .. parts[3] .. "  UID: " .. parts[4] .. "  GID: " .. parts[5] .. "\n"
+      out = out .. "Size: " .. parts[6] .. "  Modified: " .. (parts[7] or "?")
+      printOut(out)
+    else
+      printOut(data)
+    end
+  end
+
+  pendingCmd = nil
+  state = ST_IDLE
+end
+
+inp = {}
+
+function upd()
+  if state == ST_IDLE then
+    if inp[1] ~= nil then
+      local op, cmd = parseMsg(tostring(inp[1]))
+      if op == "IN" and cmd and #cmd > 0 then
+        execCmd(cmd)
+      end
+    end
+  end
+
+  if state == ST_WAIT_FS and inp[2] ~= nil then
+    local resp = tostring(inp[2])
+    if #resp > 0 then
+      local op, rest = parseMsg(resp)
+      if op and rest then
+        local seqStr, data = parseMsg(rest)
+        local seq = tonumber(seqStr) or 0
+        if seq > lastRespSeq then
+          lastRespSeq = seq
+          handleFSResponse(op, data)
+        end
+      end
+    end
+  end
+
+  table.clear(inp)
+end
diff --git a/atlas_os/IOC.lua b/atlas_os/IOC.lua
new file mode 100644
index 0000000..8fbe347
--- /dev/null
+++ b/atlas_os/IOC.lua
@@ -0,0 +1,39 @@
+-- IOC.lua — I/O Controller (AtlasOS Terminal v2.0)
+-- out[1] = display_text    → Terminal
+-- out[2] = display_clear   → Terminal
+-- out[3] = display_color   → Terminal
+-- out[4] = cmd_tx          → CMC.in[1] (IN|command)
+-- in[1]  = user_input      ← Terminal
+-- in[2]  = text_rx         ← CMC.out[1] (OUT|text)
+-- in[3]  = clear_rx        ← CMC.out[2] (1 = clear)
+-- in[4]  = color_rx        ← CMC.out[3] (R,G,B)
+
+local txActive = false
+
+inp = {}
+
+function upd()
+  if inp[1] ~= nil then
+    out[4] = "IN|" .. tostring(inp[1])
+    txActive = true
+  elseif txActive then
+    out[4] = ""
+    txActive = false
+  end
+
+  if inp[2] ~= nil then
+    local msg = tostring(inp[2])
+    local _, arg = msg:match("^(%w+)%|(.+)$")
+    if arg then out[1] = arg end
+  end
+
+  if inp[3] ~= nil and tonumber(inp[3]) == 1 then
+    out[2] = 1
+  end
+
+  if inp[4] ~= nil then
+    out[3] = tostring(inp[4])
+  end
+
+  table.clear(inp)
+end
diff --git a/atlas_os/MMC.lua b/atlas_os/MMC.lua
new file mode 100644
index 0000000..23b0a1f
--- /dev/null
+++ b/atlas_os/MMC.lua
@@ -0,0 +1,273 @@
+-- MMC.lua — Memory/FS Controller (AtlasOS v2.0)
+-- in[1]  = mem_rx  ← CMC.out[4] (FS request)
+-- in[3]  = mem_read ← Memory.out[1]
+-- out[1] = mem_tx  → CMC.in[2] (FS response)
+-- out[5] = mem_data → Memory.in[1]
+-- out[6] = mem_write → Memory.in[2]
+
+local SEG_SIZE = 8192
+local MAX_INODES = 64
+local ROOT_INO = 1
+
+local function parseMsg(msg)
+  local p = msg:find("|")
+  return p and msg:sub(1, p - 1) or msg, p and msg:sub(p + 1) or nil
+end
+
+local function split(str, sep)
+  local t = {}
+  if not str then return t end
+  for s in str:gmatch("[^" .. sep .. "]+") do
+    t[#t + 1] = s
+  end
+  return t
+end
+
+local inodes = {}
+local dirs = {}
+local files = {}
+local users = {}
+local sb = { seg_size = SEG_SIZE, max_inodes = MAX_INODES, root_ino = ROOT_INO }
+
+local function fsSerialize()
+  local lines = {}
+  lines[#lines + 1] = "V|1"
+  lines[#lines + 1] = "S|" .. sb.seg_size .. "|" .. sb.max_inodes .. "|" .. sb.root_ino
+  for _, u in pairs(users) do
+    lines[#lines + 1] = "U|" .. u.uid .. "|" .. u.name .. "|" .. u.gid .. "|" .. u.home .. "|" .. (u.hash or "-")
+  end
+  for i = 1, MAX_INODES do
+    local ino = inodes[i]
+    if ino then
+      lines[#lines + 1] = "I|" .. ino.ino .. "|" .. ino.typ .. "|" .. ino.mode .. "|" .. ino.uid .. "|" .. ino.gid .. "|" .. ino.size .. "|" .. ino.mtime .. "|"
+      if ino.typ == "d" and dirs[ino.ino] then
+        local entries = {}
+        for _, e in ipairs(dirs[ino.ino]) do
+          entries[#entries + 1] = e.name .. ":" .. e.ino
+        end
+        lines[#lines + 1] = "D|" .. ino.ino .. "|" .. table.concat(entries, "|")
+      elseif ino.typ == "f" and files[ino.ino] then
+        lines[#lines + 1] = "F|" .. ino.ino .. "|" .. files[ino.ino]
+      end
+    end
+  end
+  return table.concat(lines, "\n")
+end
+
+local function fsDeserialize(str)
+  inodes = {}
+  dirs = {}
+  files = {}
+  users = {}
+  sb = { seg_size = SEG_SIZE, max_inodes = MAX_INODES, root_ino = ROOT_INO }
+  if not str or #str == 0 then return false end
+  for line in str:gmatch("[^\n]+") do
+    local typ = line:sub(1, 1)
+    local rest = line:sub(3)
+    if typ == "V" then
+    elseif typ == "S" then
+      local parts = split(rest, "|")
+      if #parts >= 3 then
+        sb.seg_size = tonumber(parts[1]) or SEG_SIZE
+        sb.max_inodes = tonumber(parts[2]) or MAX_INODES
+        sb.root_ino = tonumber(parts[3]) or ROOT_INO
+      end
+    elseif typ == "U" then
+      local parts = split(rest, "|")
+      if #parts >= 4 then
+        users[tonumber(parts[1])] = { uid = tonumber(parts[1]), name = parts[2], gid = tonumber(parts[3]), home = parts[4], hash = parts[5] or "-" }
+      end
+    elseif typ == "I" then
+      local parts = split(rest, "|")
+      if #parts >= 7 then
+        local ino = tonumber(parts[1])
+        inodes[ino] = { ino = ino, typ = parts[2], mode = parts[3], uid = tonumber(parts[4]), gid = tonumber(parts[5]), size = tonumber(parts[6]), mtime = tonumber(parts[7]) or 0 }
+      end
+    elseif typ == "D" then
+      local parts = split(rest, "|")
+      if #parts >= 2 then
+        local ino = tonumber(parts[1])
+        local entries = {}
+        for i = 2, #parts do
+          local eparts = split(parts[i], ":")
+          if #eparts >= 2 then
+            entries[#entries + 1] = { name = eparts[1], ino = tonumber(eparts[2]) }
+          end
+        end
+        dirs[ino] = entries
+      end
+    elseif typ == "F" then
+      local parts = split(rest, "|")
+      if #parts >= 2 then
+        local ino = tonumber(parts[1])
+        local content = parts[2] or ""
+        for i = 3, #parts do
+          content = content .. "|" .. parts[i]
+        end
+        files[ino] = content
+      end
+    end
+  end
+  return next(inodes) ~= nil
+end
+
+local function findInodeByPath(path)
+  if not path or #path == 0 then path = "/" end
+  local parts = split(path, "/")
+  local cur = inodes[sb.root_ino]
+  if not cur then return nil end
+  if path == "/" then return cur end
+  local curIno = sb.root_ino
+  for i = 1, #parts do
+    local name = parts[i]
+    if #name > 0 then
+      local found = false
+      local dentries = dirs[curIno]
+      if dentries then
+        for _, e in ipairs(dentries) do
+          if e.name == name then
+            curIno = e.ino
+            cur = inodes[curIno]
+            found = true
+            break
+          end
+        end
+      end
+      if not found then return nil end
+    end
+  end
+  return cur and inodes[curIno] or nil
+end
+
+local respSeq = 0
+
+local function processReq(req)
+  local op, rest = parseMsg(req)
+  if not op then return "ERR|EINVAL" end
+  respSeq = respSeq + 1
+  local seqStr = tostring(respSeq) .. "|"
+
+  if op == "STAT" then
+    local path = rest or "/"
+    local ino = findInodeByPath(path)
+    if not ino then return "ERR|" .. seqStr .. "ENOENT" end
+    return "OK|" .. seqStr .. ino.ino .. "|" .. ino.typ .. "|" .. ino.mode .. "|" .. ino.uid .. "|" .. ino.gid .. "|" .. ino.size .. "|" .. ino.mtime
+
+  elseif op == "READ" then
+    local parts = split(rest or "", "|")
+    local path = parts[1] or ""
+    local offset = tonumber(parts[2]) or 0
+    local len = tonumber(parts[3]) or 8192
+    local ino = findInodeByPath(path)
+    if not ino then return "ERR|" .. seqStr .. "ENOENT" end
+    if ino.typ ~= "f" then return "ERR|" .. seqStr .. "EISDIR" end
+    local content = files[ino.ino] or ""
+    local data = content:sub(offset + 1, offset + len)
+    return "OK|" .. seqStr .. data
+
+  elseif op == "LS" then
+    local path = rest or "/"
+    local ino = findInodeByPath(path)
+    if not ino then return "ERR|" .. seqStr .. "ENOENT" end
+    if ino.typ ~= "d" then return "ERR|" .. seqStr .. "ENOTDIR" end
+    local dentries = dirs[ino.ino]
+    if not dentries then return "OK|" .. seqStr end
+    local names = {}
+    for _, e in ipairs(dentries) do
+      names[#names + 1] = e.name
+    end
+    return "OK|" .. seqStr .. table.concat(names, "|")
+
+  elseif op == "CHDIR" then
+    local path = rest or "/"
+    local ino = findInodeByPath(path)
+    if not ino then return "ERR|" .. seqStr .. "ENOENT" end
+    if ino.typ ~= "d" then return "ERR|" .. seqStr .. "ENOTDIR" end
+    return "OK|" .. seqStr .. path
+
+  elseif op == "WRITE" then
+    return "ERR|" .. seqStr .. "EROFS"
+  end
+
+  return "ERR|" .. seqStr .. "EINVAL"
+end
+
+local function defaultFS()
+  inodes = {}
+  dirs = {}
+  files = {}
+  users = {}
+
+  users[0] = { uid = 0, name = "root", gid = 0, home = "/", hash = "-" }
+  users[100] = { uid = 100, name = "captain", gid = 10, home = "/home/captain", hash = "-" }
+
+  local function mkIno(num, typ, mode, uid, gid, size)
+    inodes[num] = { ino = num, typ = typ, mode = mode, uid = uid, gid = gid, size = size or 0, mtime = 0 }
+  end
+
+  local function mkDir(num, entries)
+    dirs[num] = entries
+  end
+
+  local function mkFile(num, content)
+    files[num] = content or ""
+    local sz = #(content or "")
+    if inodes[num] then inodes[num].size = sz end
+  end
+
+  mkIno(1, "d", "755", 0, 0, 0)
+  mkDir(1, { { name = ".", ino = 1 }, { name = "..", ino = 1 }, { name = "home", ino = 2 }, { name = "etc", ino = 4 } })
+
+  mkIno(2, "d", "755", 0, 0, 0)
+  mkDir(2, { { name = ".", ino = 2 }, { name = "..", ino = 1 }, { name = "captain", ino = 5 } })
+
+  mkIno(5, "d", "700", 100, 10, 0)
+  mkDir(5, { { name = ".", ino = 5 }, { name = "..", ino = 2 }, { name = "readme.txt", ino = 3 } })
+
+  mkIno(3, "f", "644", 100, 10, 0)
+  mkFile(3, "Welcome to AtlasOS v2.0!\n")
+
+  mkIno(4, "d", "755", 0, 0, 0)
+  mkDir(4, { { name = ".", ino = 4 }, { name = "..", ino = 1 } })
+
+  local str = fsSerialize()
+  out[5] = str
+  out[6] = 1
+end
+
+local fsLoaded = false
+local prevReq = ""
+local writePending = false
+
+inp = {}
+
+function upd()
+  if not fsLoaded then
+    local memStr = inp[3] or ""
+    if #memStr > 0 and fsDeserialize(memStr) then
+      fsLoaded = true
+    else
+      fsLoaded = true
+      defaultFS()
+      writePending = true
+    end
+  end
+
+  if writePending then
+    local str = fsSerialize()
+    out[5] = str
+    out[6] = 1
+    writePending = false
+  end
+
+  if inp[1] ~= nil then
+    local req = tostring(inp[1])
+    if #req > 0 and req ~= prevReq then
+      prevReq = req
+      local resp = processReq(req)
+      out[1] = resp
+    end
+  end
+
+  table.clear(inp)
+end
diff --git a/atlas_os/docs/wiring.md b/atlas_os/docs/wiring.md
new file mode 100644
index 0000000..aaa0ed8
--- /dev/null
+++ b/atlas_os/docs/wiring.md
@@ -0,0 +1,152 @@
+# Схема соединений AtlasOS v2.0
+
+## Компоненты
+
+| Компонент | Кол-во | Назначение |
+|---|---|---|
+| MicroLua (IOC) | 1 | I/O Controller — терминал |
+| MicroLua (CMC) | 1 | Command Controller — shell |
+| MicroLua (MMC) | 1 | Memory/FS Controller — ФС |
+| Terminal | 1 | текстовый дисплей |
+| Memory | 1 | хранилище 8192 символа |
+
+## Полная схема
+
+```
+  Терминал (Keyboard/Button)        Терминал (Display)
+         │ text                          ▲
+         ▼                               │ text
+  ┌──────────┐         ┌──────────┐      │ clear
+  │          │─────────▶          │──────┤ color
+  │   IOC    │  IN|cmd │   CMC   │      │
+  │          │◀────────│         │◀─────┤
+  └──────────┘ OUT|text│         │  1   │
+        ▲     clear=1  │         │◀─────┤
+        │     R,G,B    └────▲────┘ R,G,B│
+        │                   │           │
+        │              LS|path          │
+        │              READ|...         │
+        │                   │           │
+        │              ┌────▼────┐      │
+        │              │         │      │
+        │              │   MMC   │      │
+        │              │         │      │
+        │              └──┬──┬───┘      │
+        │                 │  │          │
+        │           data  │  │ write(1) │
+        │                 ▼  ▼          │
+        │              ┌────────┐       │
+        │              │ Memory │       │
+        │              │ 8192   │       │
+        │              └───┬────┘       │
+        │                  │            │
+        └──────────────────┴────────────┘
+```
+
+## Соединения проводом
+
+### IOC ↔ Терминал
+
+| Пин IOC | → / ← | Пин Terminal | Назначение |
+|---|---|---|---|
+| IOC.out[1] | → | Display.in (text) | текст на экран |
+| IOC.out[2] | → | Display.in (clear) | очистка (1) |
+| IOC.out[3] | → | Display.in (color) | цвет R,G,B |
+| IOC.in[1] | ← | Keyboard.out (text) | ввод пользователя |
+
+### IOC ↔ CMC
+
+| Пин IOC | → / ← | Пин CMC | Назначение |
+|---|---|---|---|
+| IOC.out[4] | → | CMC.in[1] | команда `IN|cmd` |
+| CMC.out[1] | → | IOC.in[2] | текст `OUT|text` |
+| CMC.out[2] | → | IOC.in[3] | очистка (1) |
+| CMC.out[3] | → | IOC.in[4] | цвет `R,G,B` |
+
+### CMC ↔ MMC
+
+| Пин CMC | → / ← | Пин MMC | Назначение |
+|---|---|---|---|
+| CMC.out[4] | → | MMC.in[1] | запрос `OP|args` |
+| MMC.out[1] | → | CMC.in[2] | ответ `OK|seq|...` |
+
+### MMC ↔ Memory
+
+| Пин MMC | → / ← | Пин Memory | Назначение |
+|---|---|---|---|
+| MMC.out[5] | → | Memory.in[1] | данные для записи |
+| MMC.out[6] | → | Memory.in[2] | сигнал записи (1) |
+| Memory.out[1] | → | MMC.in[3] | чтение данных |
+
+## Протокол шины
+
+### IOC → CMC (CMD)
+
+```
+IN|команда
+```
+
+### CMC → IOC (CMD)
+
+```
+OUT|текст         — вывести текст
+1 на out[2]       — очистить экран
+R,G,B на out[3]   — установить цвет
+```
+
+### CMC → MMC (MEM)
+
+```
+STAT|путь                        — метаданные
+READ|путь|смещение|длина         — чтение файла
+LS|путь                          — список каталога
+CHDIR|путь                       — смена директории (проверка)
+WRITE|путь|смещение|данные       — запись (пока EROFS)
+```
+
+### MMC → CMC (MEM)
+
+```
+OK|seq|данные
+ERR|seq|код_ошибки
+```
+
+Коды ошибок: `ENOENT`, `EACCES`, `ENOTDIR`, `EISDIR`, `EROFS`, `EINVAL`
+
+## Последовательность запуска
+
+1. Загрузить код MMC.lua в контроллер MMC
+2. Загрузить код CMC.lua в контроллер CMC
+3. Загрузить код IOC.lua в контроллер IOC
+4. Соединить провода по схеме выше
+5. При первом запуске MMC инициализирует пустую ФС и запишет в Memory
+6. Подать сигнал на Terminal — появится приглашение
+
+## Пример сессии
+
+```
+> ls
+home
+etc
+> ls /home/captain
+readme.txt
+> cat /home/captain/readme.txt
+Welcome to AtlasOS v2.0!
+> cd /home/captain
+/home/captain
+> status
+AtlasOS v2.0 | User: root(0) | CWD: /home/captain
+> color 0 255 128
+Color set to 0,255,128
+> help
+AtlasOS v2.0 commands:
+  help  Show help
+  echo  Echo text
+  clear  Clear screen
+  color  Set color R G B
+  status  System status
+  ls  List directory [path]
+  cat  Show file content
+  cd  Change directory [path]
+  stat  Show file metadata
+```