diff --git a/claw/repo-claw.lua b/claw/repo-claw.lua
index c565b55..571aa60 100644
--- a/claw/repo-claw.lua
+++ b/claw/repo-claw.lua
@@ -251,6 +251,24 @@ return {
    "docs/repoauthors/app-slaunch"
   },
  },
+ ["svc-virtudev"] = {
+  desc = "a clone of vcomponent",
+  v = 0,
+  deps = {
+   "neo",
+   "zzz-license-pd"
+  },
+  dirs = {
+   "apps",
+   "docs",
+   "docs/repoauthors"
+  },
+  files = {
+   "apps/svc-virtudev.lua",
+   "apps/app-vdrslamp.lua",
+   "docs/repoauthors/svc-virtudev"
+  },
+ },
  -- libraries
  ["lib-knbs"] = {
   desc = "NBS reader/writer library",
diff --git a/laboratory/reset.sh b/laboratory/reset.sh
index ba4e8fa..ce86009 100755
--- a/laboratory/reset.sh
+++ b/laboratory/reset.sh
@@ -6,9 +6,5 @@
 cp ocemu.cfg.default ocemu.cfg && rm -rf c1-sda c1-sdb
 mkdir c1-sda c1-sdb
 echo -n c1-sda > c1-eeprom/data.bin
-cd ..
-cp -r code/* laboratory/c1-sdb/
-cp -r repository/* laboratory/c1-sdb/
-lua claw/clawconv.lua laboratory/c1-sdb/data/app-claw/ < claw/code-claw.lua > /dev/null
-lua claw/clawconv.lua laboratory/c1-sdb/data/app-claw/ < claw/repo-claw.lua >> /dev/null
-cp -r laboratory/c1-sdb/* laboratory/c1-sda/
+
+./update.sh
diff --git a/laboratory/update.sh b/laboratory/update.sh
new file mode 100755
index 0000000..4f23621
--- /dev/null
+++ b/laboratory/update.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# This is released into the public domain.
+# No warranty is provided, implied or otherwise.
+
+cd ..
+cp -r code/* laboratory/c1-sdb/
+cp -r repository/* laboratory/c1-sdb/
+lua claw/clawconv.lua laboratory/c1-sdb/data/app-claw/ < claw/code-claw.lua > /dev/null
+lua claw/clawconv.lua laboratory/c1-sdb/data/app-claw/ < claw/repo-claw.lua >> /dev/null
+cp -r laboratory/c1-sdb/* laboratory/c1-sda/
diff --git a/repository/apps/app-vdrslamp.lua b/repository/apps/app-vdrslamp.lua
new file mode 100644
index 0000000..68f7246
--- /dev/null
+++ b/repository/apps/app-vdrslamp.lua
@@ -0,0 +1,49 @@
+-- This is released into the public domain.
+-- No warranty is provided, implied or otherwise.
+
+-- svc-vdrslamp.lua : Virtual Redstone Lamp
+-- Authors: 20kdc
+
+local vdev = neo.requireAccess("x.svc.virtudev", "lamp dev")
+
+local evr = neo.requireAccess("x.neo.pub.window", "the lamp")
+local wnd = evr(12, 6)
+
+local bLine = (" "):rep(12)
+
+local function blank()
+ return 0
+end
+
+local total = 0
+
+vdev.install({
+ type = "redstone",
+ address = "vdrslamp-" .. neo.pid,
+ slot = 0,
+ getWakeThreshold = blank,
+ setWakeThreshold = blank,
+ getInput = blank,
+ getOutput = function (i)
+  return total
+ end,
+ setOutput = function (i, v)
+  total = v
+  wnd.setSize(12, 6)
+ end
+})
+
+while true do
+ local e = {coroutine.yield()}
+ if e[1] == "x.neo.pub.window" then
+  if e[3] == "close" then
+   -- the ignorance of unregistration is deliberate
+   -- a working impl. will properly recover
+   return
+  elseif e[3] == "line" then
+   local bg = 0xFFFFFF
+   if total == 0 then bg = 0 end
+   wnd.span(1, e[4], bLine, bg, bg)
+  end
+ end
+end
diff --git a/repository/apps/svc-virtudev.lua b/repository/apps/svc-virtudev.lua
new file mode 100644
index 0000000..68b2d00
--- /dev/null
+++ b/repository/apps/svc-virtudev.lua
@@ -0,0 +1,156 @@
+-- This is released into the public domain.
+-- No warranty is provided, implied or otherwise.
+
+-- svc-virtudev.lua : Virtual Device interface
+-- Authors: 20kdc
+
+local ic = neo.requireAccess("x.neo.pub.base", "to lock x.svc.virtudev")
+-- this is a pretty powerful permission, and PROBABLY EXPLOITABLE
+ic.lockPerm("x.svc.virtudev")
+local r = neo.requireAccess("r.svc.virtudev", "api endpoint")
+
+local root = neo.requireAccess("k.root", "the ability to modify the component API")
+
+local proxies = {}
+local types = {}
+
+local function uninstall(k)
+ proxies[k] = nil
+ types[k] = nil
+ root.computer.pushSignal("component_removed", k, types[k])
+end
+
+local users = {}
+local userCount = 0
+
+r(function (pkg, pid, sendSig)
+ local userAddresses = {}
+ users[pid] = userAddresses
+ userCount = userCount + 1
+ return {
+  install = function (proxy)
+   local proxyAddress = proxy.address
+   local proxyType = proxy.type
+   assert(type(proxyAddress) == "string")
+   assert(type(proxyType) == "string")
+   assert(not proxies[proxyAddress], "proxy address in use: " .. proxyAddress)
+   proxies[proxyAddress] = proxy
+   types[proxyAddress] = proxyType
+   userAddresses[proxyAddress] = true
+   root.computer.pushSignal("component_added", proxyAddress, proxyType)
+   return function (a, ...)
+    root.computer.pushSignal(a, proxyAddress, ...)
+   end
+  end,
+  uninstall = function (k)
+   if userAddresses[k] then
+    uninstall(k)
+    userAddresses[k] = nil
+   end
+  end
+ }
+end)
+
+local componentProxyRaw = root.component.proxy
+local componentTypeRaw = root.component.type
+local componentMethodsRaw = root.component.methods
+local componentFieldsRaw = root.component.fields
+local componentDocRaw = root.component.doc
+local componentInvokeRaw = root.component.invoke
+local componentListRaw = root.component.list
+
+root.component.proxy = function (address)
+ if proxies[address] then
+  return proxies[address]
+ end
+ return componentProxyRaw(address)
+end
+
+root.component.type = function (address)
+ if types[address] then
+  return types[address]
+ end
+ return componentTypeRaw(address)
+end
+
+local function methodsFieldsHandler(address, methods)
+ if proxies[address] then
+  local mt = {}
+  for k, v in pairs(proxies[address]) do
+   if (type(v) == "function") == methods then
+    mt[k] = true
+   end
+  end
+  return mt
+ end
+ if methods then
+  return componentMethodsRaw(address)
+ else
+  return componentFieldsRaw(address)
+ end
+end
+
+root.component.methods = function (address) return methodsFieldsHandler(address, true) end
+root.component.fields = function (address) return methodsFieldsHandler(address, false) end
+root.component.doc = function (address, method)
+ if proxies[address] then
+  return tostring(proxies[address][method])
+ end
+ return componentDocRaw(address, method)
+end
+root.component.invoke = function (address, method, ...)
+ if proxies[address] then
+  return proxies[address][method](...)
+ end
+ return componentInvokeRaw(address, method, ...)
+end
+
+root.component.list = function (f, e)
+ local iter = componentListRaw(f, e)
+ local ended = false
+ local others = {}
+ for k, v in pairs(types) do
+  if (f == v) or ((not e) and v:find(f, 1, true)) then
+   table.insert(others, {k, v})
+  end
+ end
+ return function ()
+  if not ended then
+   local a, t = iter()
+   if not a then
+    ended = true
+   else
+    return a, t
+   end
+  end
+  -- at end of that, so what about others
+  local ent = table.remove(others, 1)
+  if ent then
+   return table.unpack(ent)
+  end
+ end
+end
+
+while true do
+ local e1, e2, e3 = coroutine.yield()
+ if e1 == "k.procdie" then
+  if users[e3] then
+   for k, _ in pairs(users[e3]) do
+    uninstall(k)
+   end
+   users[e3] = nil
+   userCount = userCount - 1
+   if userCount == 0 then
+    break
+   end
+  end
+ end
+end
+
+root.component.proxy = componentProxyRaw
+root.component.type = componentTypeRaw
+root.component.methods = componentMethodsRaw
+root.component.fields = componentFieldsRaw
+root.component.doc = componentDocRaw
+root.component.invoke = componentInvokeRaw
+root.component.list = componentListRaw
diff --git a/repository/docs/repoauthors/svc-virtudev b/repository/docs/repoauthors/svc-virtudev
new file mode 100644
index 0000000..c031a1f
--- /dev/null
+++ b/repository/docs/repoauthors/svc-virtudev
@@ -0,0 +1,3 @@
+repository/apps/svc-virtudev.lua: 20kdc, Public Domain
+repository/apps/app-vdrslamp.lua: 20kdc, Public Domain
+