diff --git a/base.mk b/base.mk
index 1008f47..82f8536 100644
--- a/base.mk
+++ b/base.mk
@@ -2,10 +2,11 @@ DEBUG = -g -gdwarf-4
 
 AFLAGS += --fatal-warnings
 
-CFLAGS += -falign-functions=4 -ffunction-sections -fdata-sections -fshort-enums -ffreestanding -nostdlib
+CFLAGS += -falign-functions=4 -ffunction-sections -fdata-sections -fshort-enums -ffreestanding -nostdlib -fno-builtin -finline-stringops
 CFLAGS += -Wall -Werror -Wfatal-errors
 CFLAGS += -Wno-array-bounds
 #CFLAGS += -Wno-error=narrowing -Wno-error=unused-variable -Wno-error=array-bounds=
+CFLAGS += -Wno-error=maybe-uninitialized
 
 CXXFLAGS += -fno-exceptions -fno-non-call-exceptions -fno-rtti -fno-threadsafe-statics
 
diff --git a/common.mk b/common.mk
index 696f83f..b5fd50c 100644
--- a/common.mk
+++ b/common.mk
@@ -2,7 +2,7 @@ MAKEFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
 DIR := $(dir $(MAKEFILE_PATH))
 
 LIB ?= .
-OPT ?= -O2
+OPT ?= -Os
 GENERATED ?=
 
 AARCH = --isa=sh4 --little
diff --git a/example/clipping.cpp b/example/clipping.cpp
index 8179988..1aa8cfb 100644
--- a/example/clipping.cpp
+++ b/example/clipping.cpp
@@ -46,7 +46,7 @@ void do_get_condition(uint32_t * command_buf,
 
   const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf,
                                                                                         data_fields);
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
 
   maple::dma_start(command_buf, command_size,
diff --git a/example/clipping2.cpp b/example/clipping2.cpp
index f4b4389..8ef15aa 100644
--- a/example/clipping2.cpp
+++ b/example/clipping2.cpp
@@ -47,9 +47,8 @@ void do_get_condition(uint32_t * command_buf,
     .function_type = std::byteswap(function_type::controller)
   };
 
-  const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf,
-                                                                                        data_fields);
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf, data_fields);
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
   maple::dma_start(command_buf, command_size,
                    receive_buf, maple::sizeof_command(host_response));
diff --git a/example/clipping_textured.cpp b/example/clipping_textured.cpp
index 2a62628..1559b4d 100644
--- a/example/clipping_textured.cpp
+++ b/example/clipping_textured.cpp
@@ -51,14 +51,14 @@ void do_get_condition(uint32_t * command_buf,
 
   const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf,
                                                                                         data_fields);
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
   maple::dma_start(command_buf, command_size,
                    receive_buf, maple::sizeof_command(host_response));
 
-  using command_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   for (uint8_t port = 0; port < 4; port++) {
-    auto response = reinterpret_cast<command_response_type *>(receive_buf);
+    auto response = reinterpret_cast<host_response_type *>(receive_buf);
     auto& bus_data = response[port].bus_data;
     if (bus_data.command_code != response_type::command_code) {
       return;
diff --git a/example/maple_analog.cpp b/example/maple_analog.cpp
index 030e904..98c6701 100644
--- a/example/maple_analog.cpp
+++ b/example/maple_analog.cpp
@@ -46,7 +46,7 @@ void do_get_condition(uint32_t * command_buf,
 
   const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf,
                                                                                         data_fields);
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
 
   maple::dma_start(command_buf, command_size,
diff --git a/example/maple_controller.cpp b/example/maple_controller.cpp
index 78f277f..68b58df 100644
--- a/example/maple_controller.cpp
+++ b/example/maple_controller.cpp
@@ -5,114 +5,162 @@
 #include "holly/core_bits.hpp"
 #include "holly/holly.hpp"
 #include "maple/maple.hpp"
-#include "maple/maple_impl.hpp"
+#include "maple/maple_port.hpp"
 #include "maple/maple_bus_bits.hpp"
 #include "maple/maple_bus_commands.hpp"
 #include "maple/maple_bus_ft0.hpp"
+#include "maple/maple_host_command_writer.hpp"
 #include "sh7091/serial.hpp"
 
-uint32_t _command_buf[(1024 + 32) / 4];
-uint32_t _receive_buf[(1024 + 32) / 4];
+#include "systembus.hpp"
 
-static uint32_t * command_buf;
-static uint32_t * receive_buf;
-
-void do_get_condition(uint32_t port)
+void do_get_condition()
 {
-  uint32_t destination_port;
-  uint32_t destination_ap;
+  uint32_t send_buf[1024] __attribute__((aligned(32)));
+  uint32_t recv_buf[1024] __attribute__((aligned(32)));
 
-  switch (port) {
-  case 0:
-    destination_port = host_instruction::port_select::a;
-    destination_ap = ap::de::device | ap::port_select::a;
-    break;
-  case 1:
-    destination_port = host_instruction::port_select::b;
-    destination_ap = ap::de::device | ap::port_select::b;
-    break;
-  case 2:
-    destination_port = host_instruction::port_select::c;
-    destination_ap = ap::de::device | ap::port_select::c;
-    break;
-  case 3:
-    destination_port = host_instruction::port_select::d;
-    destination_ap = ap::de::device | ap::port_select::d;
-    break;
-  default:
-    return;
-  }
-
-  const uint32_t command_size = maple::init_get_condition(command_buf, receive_buf,
-                                                          destination_port,
-                                                          destination_ap,
-                                                          std::byteswap(function_type::controller));
+  auto writer = maple::host_command_writer(send_buf, recv_buf);
 
+  using command_type = get_condition;
   using response_type = data_transfer<ft0::data_transfer::data_format>;
-  using command_response_type = struct maple::command_response<response_type::data_fields>;
-  auto host_response = reinterpret_cast<command_response_type *>(receive_buf);
 
-  maple::dma_start(command_buf, command_size,
-                   receive_buf, maple::sizeof_command(host_response));
+  auto [host_command, host_response]
+    = writer.append_command_all_ports<command_type, response_type>();
+
+  maple::dma_start(send_buf, writer.send_offset,
+                   recv_buf, writer.recv_offset);
+
+  for (uint8_t port = 0; port < 4; port++) {
+    auto& bus_data = host_response[port].bus_data;
+    auto& data_fields = bus_data.data_fields;
+
+    if (bus_data.command_code != response_type::command_code) {
+      //serial::string("device did not reply to get_condition: ");
+      //serial::integer<uint8_t>(port);
+    } else if ((data_fields.function_type & std::byteswap(function_type::controller)) != 0) {
+      bool a = ft0::data_transfer::digital_button::a(data_fields.data.digital_button);
+      if (a == 0) {
+	serial::string("port ");
+	serial::integer<uint8_t>(port);
+	serial::string("  `a` press ");
+	serial::integer<uint8_t>(a);
+      }
+    }
+  }
+}
+
+void do_lm_request(uint8_t port, uint8_t lm)
+{
+  uint32_t send_buf[1024] __attribute__((aligned(32)));
+  uint32_t recv_buf[1024] __attribute__((aligned(32)));
+
+  auto writer = maple::host_command_writer(send_buf, recv_buf);
+
+  uint32_t host_port_select = host_instruction_port_select(port);
+  uint32_t destination_ap = ap_port_select(port) | ap::de::expansion_device | lm;
+
+  using command_type = device_request;
+  using response_type = device_status;
+
+  auto [host_command, host_response]
+    = writer.append_command<command_type, response_type>(host_port_select,
+							 destination_ap,
+							 true); // end_flag
+
+  maple::dma_start(send_buf, writer.send_offset,
+                   recv_buf, writer.recv_offset);
 
   auto& bus_data = host_response->bus_data;
-  if (bus_data.command_code != response_type::command_code) {
-    return;
-  }
   auto& data_fields = bus_data.data_fields;
-  if ((data_fields.function_type & std::byteswap(function_type::controller)) == 0) {
-    return;
+  if (bus_data.command_code != device_status::command_code) {
+    serial::string("lm did not reply: ");
+    serial::integer<uint8_t>(port, ' ');
+    serial::integer<uint8_t>(lm);
+  } else {
+    serial::string("    lm: ");
+    serial::integer<uint8_t>(lm);
+    serial::string("      ft:    ");
+    serial::integer<uint32_t>(std::byteswap(data_fields.device_id.ft));
+    serial::string("      fd[0]: ");
+    serial::integer<uint32_t>(std::byteswap(data_fields.device_id.fd[0]));
+    serial::string("      fd[1]: ");
+    serial::integer<uint32_t>(std::byteswap(data_fields.device_id.fd[1]));
+    serial::string("      fd[2]: ");
+    serial::integer<uint32_t>(std::byteswap(data_fields.device_id.fd[2]));
+    serial::string("      source_ap.lm_bus: ");
+    serial::integer<uint8_t>(bus_data.source_ap & ap::lm_bus::bit_mask);
   }
+}
 
-  bool a = ft0::data_transfer::digital_button::a(data_fields.data.digital_button);
-  if (a == 0) {
-    serial::string("port ");
-    serial::integer<uint8_t>(port);
-    serial::string("  `a` press ");
-    serial::integer<uint8_t>(a);
-  }
+void do_lm_requests(uint8_t port, uint8_t lm)
+{
+  if (lm & ap::lm_bus::_0)
+    do_lm_request(port, lm & ap::lm_bus::_0);
+  if (lm & ap::lm_bus::_1)
+    do_lm_request(port, lm & ap::lm_bus::_1);
+  if (lm & ap::lm_bus::_2)
+    do_lm_request(port, lm & ap::lm_bus::_2);
+  if (lm & ap::lm_bus::_3)
+    do_lm_request(port, lm & ap::lm_bus::_3);
+  if (lm & ap::lm_bus::_4)
+    do_lm_request(port, lm & ap::lm_bus::_4);
 }
 
 void do_device_request()
 {
+  uint32_t send_buf[1024] __attribute__((aligned(32)));
+  uint32_t recv_buf[1024] __attribute__((aligned(32)));
+
+  auto writer = maple::host_command_writer(send_buf, recv_buf);
+
   using command_type = device_request;
   using response_type = device_status;
 
-  const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf);
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
-  auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
+  auto [host_command, host_response]
+    = writer.append_command_all_ports<command_type, response_type>();
 
-  maple::dma_start(command_buf, command_size,
-                   receive_buf, maple::sizeof_command(host_response));
+  maple::dma_start(send_buf, writer.send_offset,
+                   recv_buf, writer.recv_offset);
 
   for (uint8_t port = 0; port < 4; port++) {
     auto& bus_data = host_response[port].bus_data;
-    auto& data_fields = host_response[port].bus_data.data_fields;
+    auto& data_fields = bus_data.data_fields;
     if (bus_data.command_code != device_status::command_code) {
-      // the controller is disconnected
+      serial::string("port: ");
+      serial::integer<uint8_t>(port);
+      serial::string("  disconnected\n");
     } else {
-      if ((data_fields.device_id.ft & std::byteswap(function_type::controller)) != 0) {
-	//serial::string("is controller: ");
-	//serial::integer<uint8_t>(port);
-	do_get_condition(port);
-      }
+      serial::string("port: ");
+      serial::integer<uint8_t>(port);
+      serial::string("  ft:    ");
+      serial::integer<uint32_t>(std::byteswap(data_fields.device_id.ft));
+      serial::string("  fd[0]: ");
+      serial::integer<uint32_t>(std::byteswap(data_fields.device_id.fd[0]));
+      serial::string("  fd[1]: ");
+      serial::integer<uint32_t>(std::byteswap(data_fields.device_id.fd[1]));
+      serial::string("  fd[2]: ");
+      serial::integer<uint32_t>(std::byteswap(data_fields.device_id.fd[2]));
+      serial::string("  source_ap.lm_bus: ");
+      serial::integer<uint8_t>(bus_data.source_ap & ap::lm_bus::bit_mask);
+
+      do_lm_requests(port,
+		     bus_data.source_ap & ap::lm_bus::bit_mask);
     }
   }
 }
 
 void main()
 {
-  command_buf = align_32byte(_command_buf);
-  command_buf = reinterpret_cast<uint32_t *>(reinterpret_cast<uint32_t>(command_buf) | 0xa000'0000);
-  receive_buf = align_32byte(_receive_buf);
-
   // flycast needs this in HLE mode, or else it won't start the vcount
   // counter.
   video_output::set_mode_vga();
 
+  do_device_request();
+
   while (1) {
     while (!spg_status::vsync(holly.SPG_STATUS));
     while (spg_status::vsync(holly.SPG_STATUS));
-    do_device_request();
+
+    do_get_condition();
   };
 }
diff --git a/example/maple_device_request.cpp b/example/maple_device_request.cpp
index 9781b9c..7857d68 100644
--- a/example/maple_device_request.cpp
+++ b/example/maple_device_request.cpp
@@ -18,7 +18,7 @@ void main()
 
   uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf);
 
-  constexpr uint32_t host_response_size = (sizeof (maple::command_response<response_type::data_fields>));
+  constexpr uint32_t host_response_size = (sizeof (maple::host_response<response_type::data_fields>));
 
   maple::dma_start(command_buf, command_size,
                    receive_buf, host_response_size);
diff --git a/example/maple_vibrator.cpp b/example/maple_vibrator.cpp
index c86f8f9..9ae5fbb 100644
--- a/example/maple_vibrator.cpp
+++ b/example/maple_vibrator.cpp
@@ -47,16 +47,17 @@ void do_lm_request(uint8_t port, uint8_t lm)
   maple::init_host_command(command_buf, receive_buf,
 			   destination_port,
 			   destination_ap, get_media_info::command_code, (sizeof (struct get_media_info::data_fields)),
-			   true);
+			   true); // end_flag
 
-  using host_command_type = struct maple::host_command<get_media_info::data_fields>;
+  using command_type = get_media_info;
+  using host_command_type = struct maple::host_command<command_type::data_fields>;
   auto host_command = reinterpret_cast<host_command_type *>(command_buf);
   auto& fields = host_command->bus_data.data_fields;
   fields.function_type = std::byteswap(function_type::vibration);
   fields.pt = std::byteswap(1 << 24);
 
   using response_type = data_transfer<ft8::data_transfer::data_format>;
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
 
   serial::string("dma start\n");
@@ -118,7 +119,7 @@ void do_lm_request(uint8_t port, uint8_t lm)
     fields.write_in_data.freq = 0x27;
     fields.write_in_data.inc = 0x00;
 
-    using host_response_type = struct maple::command_response<device_reply::data_fields>;
+    using host_response_type = struct maple::host_response<device_reply::data_fields>;
     auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
     maple::dma_start(command_buf, maple::sizeof_command(host_command),
                      receive_buf, maple::sizeof_command(host_response));
@@ -154,11 +155,11 @@ void do_device_request()
 {
   using command_type = device_request;
   using response_type = device_status;
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
   const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf);
   maple::dma_start(command_buf, command_size,
-                   receive_buf, maple::sizeof_command(host_response));
+                   receive_buf, maple::sizeof_command(host_response) * 4);
 
   for (uint8_t port = 0; port < 4; port++) {
     auto& bus_data = host_response[port].bus_data;
@@ -193,5 +194,6 @@ void main()
       while (spg_status::vsync(holly.SPG_STATUS));
     }
     do_device_request();
+    break;
   };
 }
diff --git a/example/maple_wink.cpp b/example/maple_wink.cpp
index 9b9fe29..675641e 100644
--- a/example/maple_wink.cpp
+++ b/example/maple_wink.cpp
@@ -42,12 +42,12 @@ void main()
   uint32_t * receive_buf = align_32byte(_receive_buf);
 
   const uint32_t command_size = maple::init_block_write(command_buf, receive_buf,
-                                                        host_instruction::port_select::a,
-                                                        ap::de::expansion_device | ap::port_select::a | ap::lm_bus::_0,
+                                                        host_instruction::port_select::b,
+                                                        ap::de::expansion_device | ap::port_select::b | ap::lm_bus::_0,
                                                         wink_buf,
                                                         wink_size);
   using response_type = device_reply;
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
   maple::dma_start(command_buf, command_size,
                    receive_buf, maple::sizeof_command(host_response));
@@ -56,6 +56,4 @@ void main()
   serial::integer<uint8_t>(host_response->bus_data.destination_ap);
   serial::integer<uint8_t>(host_response->bus_data.source_ap);
   serial::integer<uint8_t>(host_response->bus_data.data_size);
-
-  while(1);
 }
diff --git a/example/modifier_volume_with_two_volumes.cpp b/example/modifier_volume_with_two_volumes.cpp
index e881bed..d07fd56 100644
--- a/example/modifier_volume_with_two_volumes.cpp
+++ b/example/modifier_volume_with_two_volumes.cpp
@@ -47,7 +47,7 @@ void do_get_condition(uint32_t * command_buf,
 
   const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf,
                                                                                                 data_fields);
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
 
   maple::dma_start(command_buf, command_size,
diff --git a/example/texture_filtering_maple.cpp b/example/texture_filtering_maple.cpp
index 31ac0cf..5af8327 100644
--- a/example/texture_filtering_maple.cpp
+++ b/example/texture_filtering_maple.cpp
@@ -244,7 +244,7 @@ void do_get_condition(uint32_t * command_buf,
 
   const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf,
                                                                                         data_fields);
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
 
   maple::dma_start(command_buf, command_size,
diff --git a/maple/maple.cpp b/maple/maple.cpp
index 3ee4494..79e72b1 100644
--- a/maple/maple.cpp
+++ b/maple/maple.cpp
@@ -15,6 +15,7 @@
 
 namespace maple {
 
+/*
 void init_host_command(uint32_t * command_buf, uint32_t * receive_buf,
                        uint32_t destination_port,
                        uint8_t destination_ap, uint8_t command_code, uint8_t data_size,
@@ -104,6 +105,7 @@ uint32_t init_block_write(uint32_t * command_buf, uint32_t * receive_buf,
   return (reinterpret_cast<uint32_t>(&host_command[1]) - reinterpret_cast<uint32_t>(&host_command[0]))
     + data_size;
 }
+*/
 
 static inline void _dma_start(const uint32_t * command_buf)
 {
diff --git a/maple/maple.hpp b/maple/maple.hpp
index 2ae140e..eaa5188 100644
--- a/maple/maple.hpp
+++ b/maple/maple.hpp
@@ -22,7 +22,7 @@ static_assert((sizeof (host_command<uint8_t[0]>)) == 12);
 static_assert((sizeof (host_command<uint8_t[0]>[4])) == 48);
 
 template <typename T>
-struct command_response {
+struct host_response {
   struct bus_data {
     uint8_t command_code;
     uint8_t destination_ap;
@@ -32,7 +32,7 @@ struct command_response {
   } bus_data;
   uint8_t _pad[align_32byte((sizeof (bus_data))) - (sizeof (bus_data))];
 };
-static_assert((sizeof (command_response<uint8_t[0]>)) == align_32byte((sizeof (command_response<uint8_t[0]>))));
+static_assert((sizeof (host_response<uint8_t[0]>)) == align_32byte((sizeof (host_response<uint8_t[0]>))));
 
 void init_host_command(uint32_t * buf, uint32_t * receive_buf,
                        uint32_t destination_port,
diff --git a/maple/maple_bus_ft6_key_scan_codes.hpp b/maple/maple_bus_ft6_key_scan_codes.hpp
index 43f2067..70df769 100644
--- a/maple/maple_bus_ft6_key_scan_codes.hpp
+++ b/maple/maple_bus_ft6_key_scan_codes.hpp
@@ -1,7 +1,9 @@
+#pragma once
+
 #include <cstdint>
 
 namespace ft6 {
-  namespace scan_codes {
+  namespace scan_code {
     constexpr uint32_t no_operation = 0x0;
     constexpr uint32_t rollover_error = 0x1;
     constexpr uint32_t post_fail = 0x2;
@@ -52,7 +54,7 @@ namespace ft6 {
     constexpr uint32_t bracketleft_braceleft = 0x2f;
     constexpr uint32_t bracketright_braceright = 0x30;
     constexpr uint32_t backslash_bar = 0x31;
-    constexpr uint32_t _unknown_ = 0x32;
+    constexpr uint32_t iso_numbersign_tilde = 0x32;
     constexpr uint32_t semicolon_colon = 0x33;
     constexpr uint32_t apostrophe_quotedbl = 0x34;
     constexpr uint32_t grave_asciitilde = 0x35;
@@ -87,4 +89,69 @@ namespace ft6 {
     constexpr uint32_t up_arrow = 0x52;
   }
 }
+namespace ft6 {
+  namespace scan_code {
+    constexpr uint32_t last_printable = 0x38;
+
+    const uint8_t code_point[last_printable + 1][2] = {
+      [scan_code::no_operation] = { 0, 0 },
+      [scan_code::rollover_error] = { 0, 0 },
+      [scan_code::post_fail] = { 0, 0 },
+      [scan_code::undefined_error] = { 0, 0 },
+      [scan_code::a_A] = { 'a', 'A' },
+      [scan_code::b_B] = { 'b', 'B' },
+      [scan_code::c_C] = { 'c', 'C' },
+      [scan_code::d_D] = { 'd', 'D' },
+      [scan_code::e_E] = { 'e', 'E' },
+      [scan_code::f_F] = { 'f', 'F' },
+      [scan_code::g_G] = { 'g', 'G' },
+      [scan_code::h_H] = { 'h', 'H' },
+      [scan_code::i_I] = { 'i', 'I' },
+      [scan_code::j_J] = { 'j', 'J' },
+      [scan_code::k_K] = { 'k', 'K' },
+      [scan_code::l_L] = { 'l', 'L' },
+      [scan_code::m_M] = { 'm', 'M' },
+      [scan_code::n_N] = { 'n', 'N' },
+      [scan_code::o_O] = { 'o', 'O' },
+      [scan_code::p_P] = { 'p', 'P' },
+      [scan_code::q_Q] = { 'q', 'Q' },
+      [scan_code::r_R] = { 'r', 'R' },
+      [scan_code::s_S] = { 's', 'S' },
+      [scan_code::t_T] = { 't', 'T' },
+      [scan_code::u_U] = { 'u', 'U' },
+      [scan_code::v_V] = { 'v', 'V' },
+      [scan_code::w_W] = { 'w', 'W' },
+      [scan_code::x_X] = { 'x', 'X' },
+      [scan_code::y_Y] = { 'y', 'Y' },
+      [scan_code::z_Z] = { 'z', 'Z' },
+      [scan_code::_1_exclam] = { '1', '!' },
+      [scan_code::_2_at] = { '2', '@' },
+      [scan_code::_3_numbersign] = { '3', '#' },
+      [scan_code::_4_dollar] = { '4', '$' },
+      [scan_code::_5_percent] = { '5', '%' },
+      [scan_code::_6_asciicircum] = { '6', '^' },
+      [scan_code::_7_ampersand] = { '7', '&' },
+      [scan_code::_8_asterisk] = { '8', '*' },
+      [scan_code::_9_parenleft] = { '9', '(' },
+      [scan_code::_0_parenright] = { '0', ')' },
+      [scan_code::_return] = { 0, 0 },
+      [scan_code::esc] = { 0, 0 },
+      [scan_code::backspace] = { 0, 0 },
+      [scan_code::tab] = { 0, 0 },
+      [scan_code::spacebar] = { 0, 0 },
+      [scan_code::minus_underscore] = { '-', '_' },
+      [scan_code::equal_plus] = { '=', '+' },
+      [scan_code::bracketleft_braceleft] = { '[', '{' },
+      [scan_code::bracketright_braceright] = { ']', '}' },
+      [scan_code::backslash_bar] = { '\\', '|' },
+      [scan_code::iso_numbersign_tilde] = { '#', '~' },
+      [scan_code::semicolon_colon] = { ';', ':' },
+      [scan_code::apostrophe_quotedbl] = { '\'', '"' },
+      [scan_code::grave_asciitilde] = { '\'', '~' },
+      [scan_code::comma_less] = { ',', '<' },
+      [scan_code::period_greater] = { '.', '>' },
+      [scan_code::slash_question] = { '/', '?' },
+    };
+  }
+}
 
diff --git a/maple/maple_host_command_writer.hpp b/maple/maple_host_command_writer.hpp
new file mode 100644
index 0000000..d45fa98
--- /dev/null
+++ b/maple/maple_host_command_writer.hpp
@@ -0,0 +1,72 @@
+#pragma once
+
+#include <cstdint>
+#include <tuple>
+
+#include "maple/maple.hpp"
+#include "maple/maple_bus_commands.hpp"
+#include "maple/maple_bus_bits.hpp"
+
+namespace maple {
+
+struct host_command_writer {
+  uint32_t * const send_buf;
+  uint32_t * const recv_buf;
+  uint32_t send_offset;
+  uint32_t recv_offset;
+
+  constexpr host_command_writer(uint32_t * const send_buf,
+				uint32_t * const recv_buf)
+    : send_buf(send_buf), recv_buf(recv_buf), send_offset(0), recv_offset(0)
+  { }
+
+  template <typename C, typename R, int data_fields_trailing = 0>
+  constexpr inline std::tuple<maple::host_command<typename C::data_fields> *,
+			      maple::host_response<typename R::data_fields> *>
+  append_command(uint32_t host_port_select,
+		 uint32_t destination_ap,
+		 bool end_flag)
+  {
+    using command_type = maple::host_command<typename C::data_fields>;
+    using response_type = maple::host_response<typename R::data_fields>;
+    constexpr uint32_t data_size = (sizeof (typename C::data_fields)) + data_fields_trailing;
+
+    static_assert((sizeof (command_type)) % 4 == 0);
+    static_assert((sizeof (response_type)) % 4 == 0);
+    static_assert(data_size % 4 == 0);
+
+    auto host_command = reinterpret_cast<command_type *>(&send_buf[send_offset / 4]);
+    auto host_response = reinterpret_cast<response_type *>(&recv_buf[recv_offset / 4]);
+
+    host_command->host_instruction = (end_flag ? host_instruction::end_flag : 0)
+                                   | (host_port_select & host_instruction::port_select::bit_mask)
+                                   | host_instruction::transfer_length(data_size / 4);
+
+    host_command->receive_data_storage_address = receive_data_storage_address::address(reinterpret_cast<uint32_t>(host_response));
+
+    host_command->bus_data.command_code = C::command_code;
+    host_command->bus_data.destination_ap = destination_ap;
+
+    host_command->bus_data.source_ap = destination_ap & ap::port_select::bit_mask;
+    host_command->bus_data.data_size = data_size / 4;
+
+    send_offset += (sizeof (command_type)) + data_fields_trailing;
+    recv_offset += (sizeof (response_type));
+
+    return {host_command, host_response};
+  }
+
+  template <typename C, typename R>
+  constexpr inline std::tuple<maple::host_command<typename C::data_fields> *,
+			      maple::host_response<typename R::data_fields> *>
+  append_command_all_ports()
+  {
+    auto ret = append_command<C, R, 0>(host_instruction::port_select::a, ap::de::device | ap::port_select::a, false);
+    append_command<C, R, 0>(host_instruction::port_select::b, ap::de::device | ap::port_select::b, false);
+    append_command<C, R, 0>(host_instruction::port_select::c, ap::de::device | ap::port_select::c, false);
+    append_command<C, R, 0>(host_instruction::port_select::d, ap::de::device | ap::port_select::d, true);
+    return ret;
+  }
+};
+
+}
diff --git a/maple/maple_impl.hpp b/maple/maple_impl.hpp
deleted file mode 100644
index 5349d0e..0000000
--- a/maple/maple_impl.hpp
+++ /dev/null
@@ -1,81 +0,0 @@
-#pragma once
-
-#include <cstdint>
-
-#include "maple/maple.hpp"
-#include "maple/maple_bus_commands.hpp"
-#include "maple/maple_bus_bits.hpp"
-
-namespace maple {
-
-template <typename C, typename R>
-uint32_t init_host_command_all_ports(uint32_t * command_buf, uint32_t * receive_buf,
-                                     const typename C::data_fields& data_fields)
-{
-  using command_type = maple::host_command<typename C::data_fields>;
-  using response_type = maple::command_response<typename R::data_fields>;
-
-  auto host_command = reinterpret_cast<command_type *>(command_buf);
-  auto response_command = reinterpret_cast<response_type *>(receive_buf);
-
-  init_host_command((uint32_t*)&host_command[0], (uint32_t*)&response_command[0],
-                    host_instruction::port_select::a, // destination_port
-                    ap::de::device | ap::port_select::a, C::command_code, (sizeof (typename C::data_fields)),
-                    false); // end_flag
-  host_command[0].bus_data.data_fields = data_fields;
-
-  init_host_command((uint32_t*)&host_command[1], (uint32_t*)&response_command[1],
-                    host_instruction::port_select::b, // destination_port
-                    ap::de::device | ap::port_select::b, C::command_code, (sizeof (typename C::data_fields)),
-                    false); // end_flag
-  host_command[1].bus_data.data_fields = data_fields;
-
-  init_host_command((uint32_t*)&host_command[2], (uint32_t*)&response_command[2],
-                    host_instruction::port_select::c, // destination_port
-                    ap::de::device | ap::port_select::c, C::command_code, (sizeof (typename C::data_fields)),
-                    false); // end_flag
-  host_command[2].bus_data.data_fields = data_fields;
-
-  init_host_command((uint32_t*)&host_command[3], (uint32_t*)&response_command[3],
-                    host_instruction::port_select::d, // destination_port
-                    ap::de::device | ap::port_select::d, C::command_code, (sizeof (typename C::data_fields)),
-                    true); // end_flag
-  host_command[3].bus_data.data_fields = data_fields;
-
-  return reinterpret_cast<uint32_t>(&host_command[4]) - reinterpret_cast<uint32_t>(&host_command[0]);
-}
-
-template <typename C, typename R>
-uint32_t init_host_command_all_ports(uint32_t * command_buf, uint32_t * receive_buf)
-{
-  using command_type = maple::host_command<typename C::data_fields>;
-  using response_type = maple::command_response<typename R::data_fields>;
-  //static_assert((sizeof (command_type)) == 12);
-
-  auto host_command = reinterpret_cast<command_type *>(command_buf);
-  auto response_command = reinterpret_cast<response_type *>(receive_buf);
-
-  init_host_command((uint32_t*)&host_command[0], (uint32_t*)&response_command[0],
-                    host_instruction::port_select::a, // destination_port
-                    ap::de::device | ap::port_select::a, C::command_code, (sizeof (typename C::data_fields)),
-                    false); // end_flag
-
-  init_host_command((uint32_t*)&host_command[1], (uint32_t*)&response_command[1],
-                    host_instruction::port_select::b, // destination_port
-                    ap::de::device | ap::port_select::b, C::command_code, (sizeof (typename C::data_fields)),
-                    false); // end_flag
-
-  init_host_command((uint32_t*)&host_command[2], (uint32_t*)&response_command[2],
-                    host_instruction::port_select::c, // destination_port
-                    ap::de::device | ap::port_select::c, C::command_code, (sizeof (typename C::data_fields)),
-                    false); // end_flag
-
-  init_host_command((uint32_t*)&host_command[3], (uint32_t*)&response_command[3],
-                    host_instruction::port_select::d, // destination_port
-                    ap::de::device | ap::port_select::d, C::command_code, (sizeof (typename C::data_fields)),
-                    true); // end_flag
-
-  return reinterpret_cast<uint32_t>(&host_command[1]) - reinterpret_cast<uint32_t>(&host_command[0]);
-}
-
-}
diff --git a/maple/maple_port.hpp b/maple/maple_port.hpp
new file mode 100644
index 0000000..dfe2246
--- /dev/null
+++ b/maple/maple_port.hpp
@@ -0,0 +1,25 @@
+#pragma once
+
+#include "maple_bus_bits.hpp"
+
+constexpr inline uint32_t ap_port_select(const uint32_t port)
+{
+  switch (port) {
+  default: [[fallthrough]];
+  case 0: return ap::port_select::a;
+  case 1: return ap::port_select::b;
+  case 2: return ap::port_select::c;
+  case 3: return ap::port_select::d;
+  }
+}
+
+constexpr inline uint32_t host_instruction_port_select(const uint32_t port)
+{
+  switch (port) {
+  default: [[fallthrough]];
+  case 0: return host_instruction::port_select::a;
+  case 1: return host_instruction::port_select::b;
+  case 2: return host_instruction::port_select::c;
+  case 3: return host_instruction::port_select::d;
+  }
+}
diff --git a/regs/gen/maple_data_format.py b/regs/gen/maple_data_format.py
index 49a519c..da86a23 100644
--- a/regs/gen/maple_data_format.py
+++ b/regs/gen/maple_data_format.py
@@ -121,7 +121,7 @@ def render_format(format):
 
 def render_formats(name, formats):
     yield "#pragma once"
-
+    yield ""
     yield f"namespace {name} {{"
     for format in formats:
         yield from render_format(format)
diff --git a/regs/gen/maple_key_scan_codes.py b/regs/gen/maple_key_scan_codes.py
index 36738de..175be51 100644
--- a/regs/gen/maple_key_scan_codes.py
+++ b/regs/gen/maple_key_scan_codes.py
@@ -1,4 +1,5 @@
 import sys
+import string
 
 from csv_input import read_input
 from generate import renderer
@@ -9,17 +10,59 @@ def render_row(row):
     yield f"constexpr uint32_t {usage} = {hex(code)};"
 
 def render_rows(rows):
-    yield "#include <cstdint>"
-    yield ""
     yield "namespace ft6 {"
-    yield "namespace scan_codes {"
+    yield "namespace scan_code {"
     for row in rows:
         yield from render_row(row)
     yield "}"
     yield "}"
 
+def code_point(s):
+    if not s.strip():
+        return '0'
+    elif len(s) == 1:
+        assert s in string.printable
+        if s == '\\':
+            return "'\\\\'"
+        elif s.strip() == "'":
+            return "'\\''"
+        else:
+            return f"'{s}'"
+    else:
+        assert False, s
+
+last_printable = 0x38
+
+def render_normal_shift(row):
+    usage = row['usage']
+    normal = code_point(row['normal'])
+    shift = code_point(row['shift'])
+    yield f"[scan_code::{usage}] = {{ {normal}, {shift} }},"
+
+def render_scancode_code_point(rows):
+    yield "namespace ft6 {"
+    yield "namespace scan_code {"
+    yield f"constexpr uint32_t last_printable = {hex(last_printable)};"
+    yield ""
+    yield f"const uint8_t code_point[last_printable + 1][2] = {{"
+    for i, row in enumerate(rows):
+        yield from render_normal_shift(row)
+        if i == last_printable:
+            break
+    yield "};"
+    yield "}"
+    yield "}"
+
+def header():
+    yield "#pragma once"
+    yield ""
+    yield "#include <cstdint>"
+    yield ""
+
 if __name__ == "__main__":
     rows = read_input(sys.argv[1])
     render, out = renderer()
+    render(header())
     render(render_rows(rows))
+    render(render_scancode_code_point(rows))
     print(out.getvalue())
diff --git a/regs/maple_bus_ft6_key_scan_codes.csv b/regs/maple_bus_ft6_key_scan_codes.csv
index e31bc99..5b8e460 100644
--- a/regs/maple_bus_ft6_key_scan_codes.csv
+++ b/regs/maple_bus_ft6_key_scan_codes.csv
@@ -1,84 +1,84 @@
-"code","usage",
-"0x00","no_operation",
-"0x01","rollover_error",
-"0x02","post_fail",
-"0x03","undefined_error",
-"0x04","a_A",
-"0x05","b_B",
-"0x06","c_C",
-"0x07","d_D",
-"0x08","e_E",
-"0x09","f_F",
-"0x0a","g_G",
-"0x0b","h_H",
-"0x0c","i_I",
-"0x0d","j_J",
-"0x0e","k_K",
-"0x0f","l_L",
-"0x10","m_M",
-"0x11","n_N",
-"0x12","o_O",
-"0x13","p_P",
-"0x14","q_Q",
-"0x15","r_R",
-"0x16","s_S",
-"0x17","t_T",
-"0x18","u_U",
-"0x19","v_V",
-"0x1a","w_W",
-"0x1b","x_X",
-"0x1c","y_Y",
-"0x1d","z_Z",
-"0x1e","_1_exclam",
-"0x1f","_2_at",
-"0x20","_3_numbersign",
-"0x21","_4_dollar",
-"0x22","_5_percent",
-"0x23","_6_asciicircum",
-"0x24","_7_ampersand",
-"0x25","_8_asterisk",
-"0x26","_9_parenleft",
-"0x27","_0_parenright",
-"0x28","_return",
-"0x29","esc",
-"0x2a","backspace",
-"0x2b","tab",
-"0x2c","spacebar",
-"0x2d","minus_underscore",
-"0x2e","equal_plus","underscore carot"
-"0x2f","bracketleft_braceleft","at"
-"0x30","bracketright_braceright","braceleft"
-"0x31","backslash_bar",
-"0x32","_unknown_",
-"0x33","semicolon_colon",
-"0x34","apostrophe_quotedbl",
-"0x35","grave_asciitilde",
-"0x36","comma_less",
-"0x37","period_greater",
-"0x38","slash_question",
-"0x39","caps_lock",
-"0x3a","F1",
-"0x3b","F2",
-"0x3c","F3",
-"0x3d","F4",
-"0x3e","F5",
-"0x3f","F6",
-"0x40","F7",
-"0x41","F8",
-"0x42","F9",
-"0x43","F10",
-"0x44","F11",
-"0x45","F12",
-"0x46","print_screen",
-"0x47","scroll_lock",
-"0x48","pause",
-"0x49","insert",
-"0x4a","home",
-"0x4b","page_up",
-"0x4c","_delete",
-"0x4d","end",
-"0x4e","page_down",
-"0x4f","right_arrow",
-"0x50","left_arrow",
-"0x51","down_arrow",
-"0x52","up_arrow",
+"code","usage","normal","shift"
+"0x00","no_operation",,
+"0x01","rollover_error",,
+"0x02","post_fail",,
+"0x03","undefined_error",,
+"0x04","a_A","a","A"
+"0x05","b_B","b","B"
+"0x06","c_C","c","C"
+"0x07","d_D","d","D"
+"0x08","e_E","e","E"
+"0x09","f_F","f","F"
+"0x0a","g_G","g","G"
+"0x0b","h_H","h","H"
+"0x0c","i_I","i","I"
+"0x0d","j_J","j","J"
+"0x0e","k_K","k","K"
+"0x0f","l_L","l","L"
+"0x10","m_M","m","M"
+"0x11","n_N","n","N"
+"0x12","o_O","o","O"
+"0x13","p_P","p","P"
+"0x14","q_Q","q","Q"
+"0x15","r_R","r","R"
+"0x16","s_S","s","S"
+"0x17","t_T","t","T"
+"0x18","u_U","u","U"
+"0x19","v_V","v","V"
+"0x1a","w_W","w","W"
+"0x1b","x_X","x","X"
+"0x1c","y_Y","y","Y"
+"0x1d","z_Z","z","Z"
+"0x1e","_1_exclam",1,"!"
+"0x1f","_2_at",2,"@"
+"0x20","_3_numbersign",3,"#"
+"0x21","_4_dollar",4,"$"
+"0x22","_5_percent",5,"%"
+"0x23","_6_asciicircum",6,"^"
+"0x24","_7_ampersand",7,"&"
+"0x25","_8_asterisk",8,"*"
+"0x26","_9_parenleft",9,"("
+"0x27","_0_parenright",0,")"
+"0x28","_return",,
+"0x29","esc",,
+"0x2a","backspace",,
+"0x2b","tab",,
+"0x2c","spacebar",,
+"0x2d","minus_underscore","-","_"
+"0x2e","equal_plus","=","+"
+"0x2f","bracketleft_braceleft","[","{"
+"0x30","bracketright_braceright","]","}"
+"0x31","backslash_bar","\","|"
+"0x32","iso_numbersign_tilde","#","~"
+"0x33","semicolon_colon",";",":"
+"0x34","apostrophe_quotedbl","'",""""
+"0x35","grave_asciitilde","'","~"
+"0x36","comma_less",",","<"
+"0x37","period_greater",".",">"
+"0x38","slash_question","/","?"
+"0x39","caps_lock",,
+"0x3a","F1",,
+"0x3b","F2",,
+"0x3c","F3",,
+"0x3d","F4",,
+"0x3e","F5",,
+"0x3f","F6",,
+"0x40","F7",,
+"0x41","F8",,
+"0x42","F9",,
+"0x43","F10",,
+"0x44","F11",,
+"0x45","F12",,
+"0x46","print_screen",,
+"0x47","scroll_lock",,
+"0x48","pause",,
+"0x49","insert",,
+"0x4a","home",,
+"0x4b","page_up",,
+"0x4c","_delete",,
+"0x4d","end",,
+"0x4e","page_down",,
+"0x4f","right_arrow",,
+"0x50","left_arrow",,
+"0x51","down_arrow",,
+"0x52","up_arrow",,
diff --git a/regs/maple_bus_ft6_key_scan_codes.ods b/regs/maple_bus_ft6_key_scan_codes.ods
index 6d4333d..f5f6d3e 100644
Binary files a/regs/maple_bus_ft6_key_scan_codes.ods and b/regs/maple_bus_ft6_key_scan_codes.ods differ
diff --git a/sh7091/serial.hpp b/sh7091/serial.hpp
index 070621c..2a87c12 100644
--- a/sh7091/serial.hpp
+++ b/sh7091/serial.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "string.hpp"
 
 namespace serial {
diff --git a/text_editor/keyboard.cpp b/text_editor/keyboard.cpp
index bfe45e2..f7a7406 100644
--- a/text_editor/keyboard.cpp
+++ b/text_editor/keyboard.cpp
@@ -21,7 +21,7 @@ void keyboard_do_get_condition(uint32_t * command_buf,
   };
 
   const uint32_t command_size = maple::init_host_command_all_ports<command_type, response_type>(command_buf, receive_buf, data_fields);
-  using host_response_type = struct maple::command_response<response_type::data_fields>;
+  using host_response_type = struct maple::host_response<response_type::data_fields>;
   auto host_response = reinterpret_cast<host_response_type *>(receive_buf);
 
   maple::dma_start(command_buf, command_size,
@@ -68,12 +68,21 @@ void keyboard_debug(ft6::data_transfer::data_format * keyboards, uint32_t frame_
   }
 }
 
+static inline bool is_shifted(const uint8_t modifier_key)
+{
+  return
+    (ft6::data_transfer::modifier_key::right_shift() & modifier_key) ||
+    (ft6::data_transfer::modifier_key::left_shift() & modifier_key);
+}
+
 void keyboard_update(ft6::data_transfer::data_format * keyboards, uint32_t frame_ix, gap_buffer& gb)
 {
   uint32_t this_frame = (frame_ix + 0) & 1;
   uint32_t next_frame = (frame_ix + 1) & 1;
   for (int i = 0; i < 6; i++) {
-    if (i < 5 && keyboards[this_frame].scan_code_array[i + 1] != ft6::scan_codes::no_operation)
+    if (keyboards[this_frame].scan_code_array[i] == ft6::scan_code::no_operation)
+      break;
+    if (i < 5 && keyboards[this_frame].scan_code_array[i + 1] != ft6::scan_code::no_operation)
       continue;
     bool make = true;
     for (int j = 0; j < 6; j++) {
@@ -85,63 +94,25 @@ void keyboard_update(ft6::data_transfer::data_format * keyboards, uint32_t frame
     if (make) {
       // make
       uint8_t scan_code = keyboards[this_frame].scan_code_array[i];
+      if (scan_code <= ft6::scan_code::last_printable) {
+	bool shifted = is_shifted(keyboards[this_frame].modifier_key);
+	char_type code_point = ft6::scan_code::code_point[scan_code][shifted];
+	if (code_point != 0) {
+	  gap_append(gb, code_point);
+	  continue;
+	}
+      }
       switch (scan_code) {
-      case ft6::scan_codes::a_A: [[fallthrough]];
-      case ft6::scan_codes::b_B: [[fallthrough]];
-      case ft6::scan_codes::c_C: [[fallthrough]];
-      case ft6::scan_codes::d_D: [[fallthrough]];
-      case ft6::scan_codes::e_E: [[fallthrough]];
-      case ft6::scan_codes::f_F: [[fallthrough]];
-      case ft6::scan_codes::g_G: [[fallthrough]];
-      case ft6::scan_codes::h_H: [[fallthrough]];
-      case ft6::scan_codes::i_I: [[fallthrough]];
-      case ft6::scan_codes::j_J: [[fallthrough]];
-      case ft6::scan_codes::k_K: [[fallthrough]];
-      case ft6::scan_codes::l_L: [[fallthrough]];
-      case ft6::scan_codes::m_M: [[fallthrough]];
-      case ft6::scan_codes::n_N: [[fallthrough]];
-      case ft6::scan_codes::o_O: [[fallthrough]];
-      case ft6::scan_codes::p_P: [[fallthrough]];
-      case ft6::scan_codes::q_Q: [[fallthrough]];
-      case ft6::scan_codes::r_R: [[fallthrough]];
-      case ft6::scan_codes::s_S: [[fallthrough]];
-      case ft6::scan_codes::t_T: [[fallthrough]];
-      case ft6::scan_codes::u_U: [[fallthrough]];
-      case ft6::scan_codes::v_V: [[fallthrough]];
-      case ft6::scan_codes::w_W: [[fallthrough]];
-      case ft6::scan_codes::x_X: [[fallthrough]];
-      case ft6::scan_codes::y_Y: [[fallthrough]];
-      case ft6::scan_codes::z_Z:
-	{
-	  char_type code_point = (scan_code - ft6::scan_codes::a_A) + 'a';
-	  gap_append(gb, code_point);
-	}
-	break;
-      case ft6::scan_codes::_1_exclam: [[fallthrough]];
-      case ft6::scan_codes::_2_at: [[fallthrough]];
-      case ft6::scan_codes::_3_numbersign: [[fallthrough]];
-      case ft6::scan_codes::_4_dollar: [[fallthrough]];
-      case ft6::scan_codes::_5_percent: [[fallthrough]];
-      case ft6::scan_codes::_6_asciicircum: [[fallthrough]];
-      case ft6::scan_codes::_7_ampersand: [[fallthrough]];
-      case ft6::scan_codes::_8_asterisk: [[fallthrough]];
-      case ft6::scan_codes::_9_parenleft:
-	{
-	  char_type code_point = (scan_code - ft6::scan_codes::_1_exclam) + '1';
-	  gap_append(gb, code_point);
-	}
-	break;
-      case ft6::scan_codes::_0_parenright: gap_append(gb, '0'); break;
-      case ft6::scan_codes::_return:   gap_append(gb, '\n'); break;
-      case ft6::scan_codes::backspace: gap_pop(gb); break;
-      case ft6::scan_codes::spacebar:  gap_append(gb, ' '); break;
+	case ft6::scan_code::_return:   gap_append(gb, '\n'); break;
+	case ft6::scan_code::backspace: gap_pop(gb);          break;
+	case ft6::scan_code::spacebar:  gap_append(gb, ' ');  break;
 
-      case ft6::scan_codes::left_arrow: gap_cursor_pos(gb, -1); break;
-      case ft6::scan_codes::right_arrow: gap_cursor_pos(gb, 1); break;
-      case ft6::scan_codes::up_arrow: gap_cursor_pos_line(gb, -1); break;
-      case ft6::scan_codes::down_arrow: gap_cursor_pos_line(gb, 1); break;
-      default:
-	break;
+	case ft6::scan_code::left_arrow:  gap_cursor_pos(gb, -1);      break;
+	case ft6::scan_code::right_arrow: gap_cursor_pos(gb, 1);       break;
+	case ft6::scan_code::up_arrow:    gap_cursor_pos_line(gb, -1); break;
+	case ft6::scan_code::down_arrow:  gap_cursor_pos_line(gb, 1);  break;
+	default:
+	  break;
       }
     }
   }
diff --git a/text_editor/text_editor.cpp b/text_editor/text_editor.cpp
index da9fd9c..e1830b6 100644
--- a/text_editor/text_editor.cpp
+++ b/text_editor/text_editor.cpp
@@ -80,13 +80,13 @@ void main()
 
   constexpr uint32_t ta_alloc = ta_alloc_ctrl::pt_opb::no_list
                               | ta_alloc_ctrl::tm_opb::no_list
-    //| ta_alloc_ctrl::t_opb::_16x4byte
+                              | ta_alloc_ctrl::t_opb::_16x4byte
                               | ta_alloc_ctrl::om_opb::no_list
                               | ta_alloc_ctrl::o_opb::_16x4byte;
 
   constexpr struct opb_size opb_size = { .opaque = 16 * 4
                                        , .opaque_modifier = 0
-				       //, .translucent = 16 * 4
+				       , .translucent = 16 * 4
                                        , .translucent_modifier = 0
                                        , .punch_through = 0
                                        };