diff --git a/src/lua/core/computer.lua b/src/lua/core/computer.lua
index 4e32102..f90c173 100644
--- a/src/lua/core/computer.lua
+++ b/src/lua/core/computer.lua
@@ -62,30 +62,30 @@ local keymap = {
 
   [0x60 + 0x01] = 0x1E,
   [0x60 + 0x02] = 0x30,
-  [0x60 + 0x04] = 0x2E,
-  [0x60 + 0x05] = 0x20,
-  [0x60 + 0x06] = 0x12,
-  [0x60 + 0x07] = 0x21,
-  [0x60 + 0x08] = 0x22,
-  [0x60 + 0x09] = 0x23,
-  [0x60 + 0x0A] = 0x17,
-  [0x60 + 0x0B] = 0x24,
-  [0x60 + 0x0C] = 0x25,
-  [0x60 + 0x0D] = 0x26,
-  [0x60 + 0x0E] = 0x32,
-  [0x60 + 0x0F] = 0x31,
-  [0x60 + 0x11] = 0x18,
-  [0x60 + 0x12] = 0x19,
-  [0x60 + 0x13] = 0x10,
-  [0x60 + 0x14] = 0x13,
-  [0x60 + 0x15] = 0x1F,
-  [0x60 + 0x16] = 0x14,
-  [0x60 + 0x17] = 0x16,
-  [0x60 + 0x18] = 0x2F,
-  [0x60 + 0x19] = 0x11,
-  [0x60 + 0x1A] = 0x2D,
-  [0x60 + 0x1B] = 0x15,
-  [0x60 + 0x1C] = 0x2C,
+  [0x60 + 0x03] = 0x2E,
+  [0x60 + 0x04] = 0x20,
+  [0x60 + 0x05] = 0x12,
+  [0x60 + 0x06] = 0x21,
+  [0x60 + 0x07] = 0x22,
+  [0x60 + 0x08] = 0x23,
+  [0x60 + 0x09] = 0x17,
+  [0x60 + 0x0A] = 0x24,
+  [0x60 + 0x0B] = 0x25,
+  [0x60 + 0x0C] = 0x26,
+  [0x60 + 0x0D] = 0x32,
+  [0x60 + 0x0E] = 0x31,
+  [0x60 + 0x0F] = 0x18,
+  [0x60 + 0x10] = 0x19,
+  [0x60 + 0x11] = 0x10,
+  [0x60 + 0x12] = 0x13,
+  [0x60 + 0x13] = 0x1F,
+  [0x60 + 0x13] = 0x14,
+  [0x60 + 0x14] = 0x16,
+  [0x60 + 0x16] = 0x2F,
+  [0x60 + 0x17] = 0x11,
+  [0x60 + 0x18] = 0x2D,
+  [0x60 + 0x19] = 0x15,
+  [0x60 + 0x1A] = 0x2C,
 
   [13] = 28, --Return key
   [127] = 14, --backspace
@@ -105,21 +105,33 @@ local escmap = {
 }
 
 local inesc_down = false
+local esc_down_ctrl = false
 function computer.signalTransformers.key_down(s, a, ascii, key, user)
   if key ~= -1 then
     return s, a, ascii, key, user
   end
   if ascii == 27 then
-    inesc_down = native.uptime() / 1000
+    inesc_down = native.uptime()
     return nil
+  elseif ascii < 27 and ascii ~= 8 and ascii ~= 13 and ascii ~= 9 then
+    signalQueue[#signalQueue + 1] = {s, a, 0, 29, user}
+    key = keymap[ascii + 96] or -1
   elseif inesc_down then
     if (ascii < 48 or ascii > 57) and ascii ~= 59 and ascii ~= 91 then
       inesc_down = false
       key = escmap[ascii] or 0
-      ascii = 0
+      if not esc_down_ctrl then
+        --ascii = math.max(0, ascii - 96)
+      else
+        ascii = 0
+      end
+      esc_down_ctrl = false
+    elseif ascii == 91 then
+      esc_down_ctrl = true
     elseif native.uptime() - inesc_down > 100 then -- 100ms timeout after {ESC}
       return nil
     else
+      esc_down_ctrl = false
       inesc_down = false
     end
   end
@@ -127,21 +139,33 @@ function computer.signalTransformers.key_down(s, a, ascii, key, user)
 end
 
 local inesc_up = false
+local esc_up_ctrl = false
 function computer.signalTransformers.key_up(s, a, ascii, key, user)
   if key ~= -1 then
     return s, a, ascii, key, user
   end
   if ascii == 27 then
-    inesc_up = native.uptime() / 1000
+    inesc_up = native.uptime()
     return nil
+  elseif ascii < 27 and ascii ~= 8 and ascii ~= 13 and ascii ~= 9 then
+    signalQueue[#signalQueue+1] = {s, a, 0, 29, user}
+    key = keymap[ascii + 96] or 0
   elseif inesc_up then
     if (ascii < 48 or ascii > 57) and ascii ~= 59 and ascii ~= 91 then
       inesc_up = false
       key = escmap[ascii] or 0
-      ascii = 0
+      if not esc_up_ctrl then
+        --ascii = math.max(0, ascii - 96)
+      else
+        ascii = 0
+      end
+      esc_up_ctrl = false
+    elseif ascii == 91 then
+      esc_up_ctrl = true
     elseif native.uptime() - inesc_up > 100 then -- 100ms timeout after {ESC}
       return nil
     else
+      esc_up_ctrl = false
       inesc_up = false
     end
   end
diff --git a/src/lua/core/textgpu.lua b/src/lua/core/textgpu.lua
index f66946b..096bd6f 100644
--- a/src/lua/core/textgpu.lua
+++ b/src/lua/core/textgpu.lua
@@ -156,6 +156,7 @@ function textgpu.start()
   function gpu.setForeground(color, ispalette)
     checkArg(1, color, "number")
     checkArg(2, ispalette, "boolean", "nil")
+    local ret = color
     if ispalette then
       if not palette[color] then
         error("invalid palette index", 2)
@@ -164,12 +165,13 @@ function textgpu.start()
     end
     local index = math.floor(modules.color.nearest(color, mapping))
     fg = index or fg
-    return true
+    return ret, ispalette
   end
 
   function gpu.setBackground(color, ispalette)
     checkArg(1, color, "number")
     checkArg(2, ispalette, "boolean", "nil")
+    local ret = color
     if ispalette then
       if not palette[color] then
         error("invalid palette index", 2)
@@ -178,7 +180,7 @@ function textgpu.start()
     end
     local index = math.floor(modules.color.nearest(color, mapping))
     bg = index or bg
-    return true
+    return ret, ispalette
   end
 
   function gpu.setPaletteColor(c, v)