diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index cf23ad6a68..153e61d148 100644
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@@ -55,7 +55,7 @@
 		},
 		{
 			"ImportPath": "github.com/nsf/termbox-go",
-			"Rev": "675ffd907b7401b8a709a5ef2249978af5616bb2"
+			"Rev": "c4d5eeeb18b378c361f9f2a731680e8b835969ed"
 		},
 		{
 			"ImportPath": "github.com/pborman/uuid",
diff --git a/Godeps/_workspace/src/github.com/nsf/termbox-go/README.md b/Godeps/_workspace/src/github.com/nsf/termbox-go/README.md
index 334d751024..5fc1874b11 100644
--- a/Godeps/_workspace/src/github.com/nsf/termbox-go/README.md
+++ b/Godeps/_workspace/src/github.com/nsf/termbox-go/README.md
@@ -16,6 +16,8 @@ There are also some interesting projects using termbox-go:
  - [httopd](https://github.com/verdverm/httopd) is top for httpd logs.
  - [mop](https://github.com/michaeldv/mop) is stock market tracker for hackers.
  - [termui](https://github.com/gizak/termui) is a terminal dashboard.
+ - [termloop](https://github.com/JoelOtter/termloop) is a terminal game engine.
+ - [xterm-color-chart](https://github.com/kutuluk/xterm-color-chart) is a XTerm 256 color chart.
 
 ### API reference
 [godoc.org/github.com/nsf/termbox-go](http://godoc.org/github.com/nsf/termbox-go)
diff --git a/Godeps/_workspace/src/github.com/nsf/termbox-go/api.go b/Godeps/_workspace/src/github.com/nsf/termbox-go/api.go
index b08bca61a5..1e284060e6 100644
--- a/Godeps/_workspace/src/github.com/nsf/termbox-go/api.go
+++ b/Godeps/_workspace/src/github.com/nsf/termbox-go/api.go
@@ -351,7 +351,7 @@ func PollEvent() Event {
 // terminal's window size in characters). But it doesn't always match the size
 // of the terminal window, after the terminal size has changed, the internal
 // back buffer will get in sync only after Clear or Flush function calls.
-func Size() (int, int) {
+func Size() (width int, height int) {
 	return termw, termh
 }
 
@@ -380,6 +380,12 @@ func SetInputMode(mode InputMode) InputMode {
 	if mode == InputCurrent {
 		return input_mode
 	}
+	if mode&(InputEsc|InputAlt) == 0 {
+		mode |= InputEsc
+	}
+	if mode&(InputEsc|InputAlt) == InputEsc|InputAlt {
+		mode &^= InputAlt
+	}
 	if mode&InputMouse != 0 {
 		out.WriteString(funcs[t_enter_mouse])
 	} else {
@@ -391,6 +397,7 @@ func SetInputMode(mode InputMode) InputMode {
 }
 
 // Sets the termbox output mode. Termbox has four output options:
+//
 // 1. OutputNormal => [1..8]
 //    This mode provides 8 different colors:
 //        black, red, green, yellow, blue, magenta, cyan, white
@@ -402,10 +409,10 @@ func SetInputMode(mode InputMode) InputMode {
 //
 // 2. Output256 => [1..256]
 //    In this mode you can leverage the 256 terminal mode:
-//    0x00 - 0x07: the 8 colors as in OutputNormal
-//    0x08 - 0x0f: Color* | AttrBold
-//    0x10 - 0xe7: 216 different colors
-//    0xe8 - 0xff: 24 different shades of grey
+//    0x01 - 0x08: the 8 colors as in OutputNormal
+//    0x09 - 0x10: Color* | AttrBold
+//    0x11 - 0xe8: 216 different colors
+//    0xe9 - 0x1ff: 24 different shades of grey
 //
 //    Example usage:
 //        SetCell(x, y, '@', 184, 240);
@@ -415,11 +422,12 @@ func SetInputMode(mode InputMode) InputMode {
 //    This mode supports the 3rd range of the 256 mode only.
 //    But you dont need to provide an offset.
 //
-// 4. OutputGrayscale => [1..24]
-//    This mode supports the 4th range of the 256 mode only.
+// 4. OutputGrayscale => [1..26]
+//    This mode supports the 4th range of the 256 mode
+//    and black and white colors from 3th range of the 256 mode
 //    But you dont need to provide an offset.
 //
-// In all modes, 0 represents the default color.
+// In all modes, 0x00 represents the default color.
 //
 // `go run _demos/output.go` to see its impact on your terminal.
 //
diff --git a/Godeps/_workspace/src/github.com/nsf/termbox-go/api_windows.go b/Godeps/_workspace/src/github.com/nsf/termbox-go/api_windows.go
index 78d954b36c..203544bbff 100644
--- a/Godeps/_workspace/src/github.com/nsf/termbox-go/api_windows.go
+++ b/Godeps/_workspace/src/github.com/nsf/termbox-go/api_windows.go
@@ -80,6 +80,10 @@ func Close() {
 	// stop event producer
 	cancel_comm <- true
 	set_event(interrupt)
+	select {
+		case <-input_comm:
+		default:
+	}
 	<-cancel_done_comm
 
 	set_console_cursor_info(out, &orig_cursor_info)
diff --git a/Godeps/_workspace/src/github.com/nsf/termbox-go/syscalls_darwin_386.go b/Godeps/_workspace/src/github.com/nsf/termbox-go/syscalls_darwin.go
similarity index 100%
rename from Godeps/_workspace/src/github.com/nsf/termbox-go/syscalls_darwin_386.go
rename to Godeps/_workspace/src/github.com/nsf/termbox-go/syscalls_darwin.go
diff --git a/Godeps/_workspace/src/github.com/nsf/termbox-go/termbox.go b/Godeps/_workspace/src/github.com/nsf/termbox-go/termbox.go
index 0aee8aca90..f754880d29 100644
--- a/Godeps/_workspace/src/github.com/nsf/termbox-go/termbox.go
+++ b/Godeps/_workspace/src/github.com/nsf/termbox-go/termbox.go
@@ -72,6 +72,12 @@ var (
 	input_comm     = make(chan input_event)
 	interrupt_comm = make(chan struct{})
 	intbuf         = make([]byte, 0, 16)
+
+	// grayscale indexes
+	grayscale = []Attribute{
+		0, 17, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244,
+		245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256, 232,
+	}
 )
 
 func write_cursor(x, y int) {
@@ -171,17 +177,17 @@ func send_attr(fg, bg Attribute) {
 	case OutputGrayscale:
 		fgcol = fg & 0x1F
 		bgcol = bg & 0x1F
-		if fgcol > 24 {
+		if fgcol > 26 {
 			fgcol = ColorDefault
 		}
-		if bgcol > 24 {
+		if bgcol > 26 {
 			bgcol = ColorDefault
 		}
 		if fgcol != ColorDefault {
-			fgcol += 0xe8
+			fgcol = grayscale[fgcol]
 		}
 		if bgcol != ColorDefault {
-			bgcol += 0xe8
+			bgcol = grayscale[bgcol]
 		}
 	default:
 		fgcol = fg & 0x0F
diff --git a/Godeps/_workspace/src/github.com/nsf/termbox-go/termbox_windows.go b/Godeps/_workspace/src/github.com/nsf/termbox-go/termbox_windows.go
index 17d1bdc84b..f345d0eb00 100644
--- a/Godeps/_workspace/src/github.com/nsf/termbox-go/termbox_windows.go
+++ b/Godeps/_workspace/src/github.com/nsf/termbox-go/termbox_windows.go
@@ -129,7 +129,7 @@ func create_console_screen_buffer() (h syscall.Handle, err error) {
 			err = syscall.EINVAL
 		}
 	}
-	return syscall.Handle(r0), nil
+	return syscall.Handle(r0), err
 }
 
 func get_console_screen_buffer_info(h syscall.Handle, info *console_screen_buffer_info) (err error) {
@@ -305,7 +305,7 @@ func create_event() (out syscall.Handle, err error) {
 			err = syscall.EINVAL
 		}
 	}
-	return syscall.Handle(r0), nil
+	return syscall.Handle(r0), err
 }
 
 func wait_for_multiple_objects(objects []syscall.Handle) (err error) {
diff --git a/Makefile b/Makefile
index 41cbc1ce6c..00db7cde76 100644
--- a/Makefile
+++ b/Makefile
@@ -7,10 +7,11 @@
 .PHONY: geth-darwin geth-darwin-386 geth-darwin-amd64
 .PHONY: geth-windows geth-windows-386 geth-windows-amd64
 .PHONY: geth-android geth-android-16 geth-android-21
+.PHONY: geth-ios geth-ios-5.0 geth-ios-8.1
 
 GOBIN = build/bin
 
-CROSSDEPS = https://gmplib.org/download/gmp/gmp-6.0.0a.tar.bz2
+CROSSDEPS = https://gmplib.org/download/gmp/gmp-6.1.0.tar.bz2
 GO ?= latest
 
 geth:
@@ -83,6 +84,20 @@ geth-android-21: xgo
 	@echo "Android 21 cross compilation done:"
 	@ls -l $(GOBIN)/geth-android-21-*
 
+geth-ios: xgo geth-ios-5.0 geth-ios-8.1
+	@echo "iOS cross compilation done:"
+	@ls -l $(GOBIN)/geth-ios-*
+
+geth-ios-5.0:
+	build/env.sh $(GOBIN)/xgo --go=$(GO) --dest=$(GOBIN) --deps=$(CROSSDEPS) --depsargs=--disable-assembly --targets=ios-5.0/* -v $(shell build/flags.sh) ./cmd/geth
+	@echo "iOS 5.0 cross compilation done:"
+	@ls -l $(GOBIN)/geth-ios-5.0-*
+
+geth-ios-8.1:
+	build/env.sh $(GOBIN)/xgo --go=$(GO) --dest=$(GOBIN) --deps=$(CROSSDEPS) --depsargs=--disable-assembly --targets=ios-8.1/* -v $(shell build/flags.sh) ./cmd/geth
+	@echo "iOS 8.1 cross compilation done:"
+	@ls -l $(GOBIN)/geth-ios-8.1-*
+
 evm:
 	build/env.sh $(GOROOT)/bin/go install -v $(shell build/flags.sh) ./cmd/evm
 	@echo "Done building."