diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2fee93a..c2a75a9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,9 @@ set(CMAKE_CXX_STANDARD_REQUIRED True)
 add_executable(
   kek
   bus.cpp
+  console.cpp
+  console_ncurses.cpp
+  console_posix.cpp
   cpu.cpp
   error.cpp
   main.cpp
diff --git a/ESP32/console.cpp b/ESP32/console.cpp
new file mode 120000
index 0000000..1e29138
--- /dev/null
+++ b/ESP32/console.cpp
@@ -0,0 +1 @@
+../console.cpp
\ No newline at end of file
diff --git a/ESP32/console.h b/ESP32/console.h
new file mode 120000
index 0000000..e323210
--- /dev/null
+++ b/ESP32/console.h
@@ -0,0 +1 @@
+../console.h
\ No newline at end of file
diff --git a/ESP32/console_esp32.cpp b/ESP32/console_esp32.cpp
new file mode 100644
index 0000000..27fd0e7
--- /dev/null
+++ b/ESP32/console_esp32.cpp
@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "console_esp32.h"
+#include "error.h"
+
+
+console_esp32::console_esp32(std::atomic_bool *const terminate) : console(terminate)
+{
+}
+
+console_esp32::~console_esp32()
+{
+}
+
+int console_esp32::wait_for_char(const int timeout)
+{
+	for(int i=0; i<timeout / 10; i++) {
+		if (Serial.available())
+			return Serial.read();
+
+		delay(10);
+	}
+
+	return -1;
+}
+
+void console_esp32::put_char(const char c)
+{
+	Serial.print(c);
+}
+
+void console_esp32::resize_terminal()
+{
+}
diff --git a/ESP32/console_esp32.h b/ESP32/console_esp32.h
new file mode 100644
index 0000000..0b48a30
--- /dev/null
+++ b/ESP32/console_esp32.h
@@ -0,0 +1,18 @@
+#include <Arduino.h>
+
+#include "console.h"
+
+
+class console_esp32 : public console
+{
+protected:
+	int wait_for_char(const int timeout) override;
+
+public:
+	console_esp32(std::atomic_bool *const terminate);
+	virtual ~console_esp32();
+
+	void put_char(const char c) override;
+
+	void resize_terminal() override;
+};
diff --git a/ESP32/main.ino b/ESP32/main.ino
index d500889..e4e665f 100644
--- a/ESP32/main.ino
+++ b/ESP32/main.ino
@@ -10,6 +10,7 @@
 #include <sys/socket.h>
 #include <sys/types.h>
 
+#include "console_esp32.h"
 #include "cpu.h"
 #include "error.h"
 #include "esp32.h"
@@ -20,9 +21,10 @@
 
 #define NEOPIXELS_PIN	25
 
-bus *b    = nullptr;
-cpu *c    = nullptr;
-tty *tty_ = nullptr;
+bus     *b    = nullptr;
+cpu     *c    = nullptr;
+tty     *tty_ = nullptr;
+console *cnsl = nullptr;
 
 uint32_t event     = 0;
 
@@ -30,11 +32,12 @@ uint16_t exec_addr = 0;
 
 uint32_t start_ts  = 0;
 
-std::atomic_bool running { false };
-std::atomic_bool on_wifi { false };
-std::atomic_bool console_telnet_clients { false };
-std::atomic_bool disk_read_activity     { false };
-std::atomic_bool disk_write_activity    { false };
+std::atomic_bool terminate { false };
+
+std::atomic_bool running   { false };
+std::atomic_bool on_wifi   { false };
+std::atomic_bool disk_read_activity  { false };
+std::atomic_bool disk_write_activity { false };
 
 void setBootLoader(bus *const b) {
 	cpu     *const c      = b->getCpu();
@@ -134,145 +137,9 @@ void panel(void *p) {
 	}
 }
 
-SemaphoreHandle_t terminal_mutex = xSemaphoreCreateMutex();
-
-constexpr int terminal_columns = 80;
-constexpr int terminal_rows    = 25;
-char terminal[terminal_columns * terminal_rows];
-uint8_t tx = 0, ty = terminal_rows - 1;
-QueueHandle_t to_telnet_queue = xQueueCreate(10, sizeof(char));
-
-void delete_first_line() {
-	memmove(&terminal[0], &terminal[terminal_columns], terminal_columns * (terminal_rows - 1));
-	memset(&terminal[terminal_columns * (terminal_rows - 1)], ' ', terminal_columns);
-}
-
-void telnet_terminal(void *p) {
-	bus *const b = reinterpret_cast<bus *>(p);
-	tty *const tty_ = b->getTty();
-
-	Serial.println(F("telnet_terminal task started"));
-
-	if (!tty_)
-		Serial.println(F(" *** NO TTY ***"));
-
-	for(;;) {
-		char cc { 0 };
-
-		xQueueReceive(tty_->getTerminalQueue(), &cc, portMAX_DELAY);
-
-		Serial.print(cc);
-
-		// update terminal buffer
-		xSemaphoreTake(terminal_mutex, portMAX_DELAY);
-
-		if (cc == 13)
-			tx = 0;
-		else if (cc == 10)
-			ty++;
-		else {
-			terminal[ty * terminal_columns + tx] = cc;
-
-			tx++;
-
-			if (tx == terminal_columns)
-				tx = 0, ty++;
-		}
-
-		if (ty == terminal_rows) {
-			delete_first_line();
-			ty--;
-		}
-
-		xSemaphoreGive(terminal_mutex);
-
-		// pass through to telnet clients
-		if (xQueueSend(to_telnet_queue, &cc, portMAX_DELAY) != pdTRUE)
-			Serial.println(F("queue TTY character failed"));
-	}
-}
-
-void wifi(void *p) {
-	Serial.println(F("wifi task started"));
-
-	int fd = socket(AF_INET, SOCK_STREAM, 0);
-
-	struct sockaddr_in server { 0 };
-	server.sin_family = AF_INET;
-	server.sin_addr.s_addr = INADDR_ANY;
-	server.sin_port = htons(23);
- 
-	if (bind(fd, (struct sockaddr *)&server, sizeof(server)) == -1)
-		Serial.println(F("bind failed"));
-
-	if (listen(fd, 3) == -1)
-		Serial.println(F("listen failed"));
-
-	struct pollfd fds[] = { { fd, POLLIN, 0 } };
-
-	std::vector<int> clients;
-
-	for(;;) {
-		on_wifi = WiFi.status() == WL_CONNECTED;
-
-		int rc = poll(fds, 1, 10);
-
-		if (rc == 1) {
-			int client = accept(fd, nullptr, nullptr);
-			if (client != -1) {
-				clients.push_back(client);
-
-				constexpr const uint8_t dont_auth[] = { 0xff, 0xf4, 0x25,  // don't auth
-									0xff, 0xfb, 0x03,  // suppress goahead
-									0xff, 0xfe, 0x22,  // don't line-mode
-									0xff, 0xfe, 0x27,  // don't new envt0
-									0xff, 0xfb, 0x01,  // will echo
-									0xff, 0xfe, 0x01,  // don't echo
-									0xff, 0xfd, 0x2d };  // no echo
-
-				write(client, dont_auth, sizeof(dont_auth));
-
-				// send initial terminal stat
-				write(client, "\033[2J", 4);
-
-				xSemaphoreTake(terminal_mutex, portMAX_DELAY);
-
-				for(int y=0; y<terminal_rows; y++) {
-					std::string out = format("\033[%dH", y + 1);
-					if (write(client, out.c_str(), out.size()) != out.size())
-						break;
-
-					if (write(client, &terminal[y * terminal_columns], terminal_columns) != terminal_columns)
-						break;
-				}
-
-				xSemaphoreGive(terminal_mutex);
-			}
-		}
-
-		console_telnet_clients = clients.empty() == false;
-
-		std::string out;
-		char c { 0 };
-		while (xQueueReceive(to_telnet_queue, &c, 10 / portMAX_DELAY) == pdTRUE)
-			out += c;
-
-		if (!out.empty()) {
-			for(size_t i=0; i<clients.size();) {
-				if (write(clients.at(i), out.c_str(), out.size()) == -1) {
-					close(clients.at(i));
-					clients.erase(clients.begin() + i);
-				}
-				else {
-					i++;
-				}
-			}
-		}
-	}
-}
-
 void setup_wifi_stations()
 {
+#if 0
 	WiFi.mode(WIFI_STA);
 
 	WiFi.softAP("PDP-11 KEK", nullptr, 5, 0, 4);
@@ -317,6 +184,7 @@ void setup_wifi_stations()
 	on_wifi = true;
 
 	Serial.println(WiFi.localIP());
+#endif
 }
 
 void setup() {
@@ -346,8 +214,11 @@ void setup() {
 
 	c->setEmulateMFPT(true);
 
+	Serial.println(F("Init console"));
+	cnsl = new console_esp32(&terminate);
+
 	Serial.println(F("Init TTY"));
-	tty_ = new tty(poll_char, get_char, put_char);
+	tty_ = new tty(cnsl);
 	Serial.println(F("Connect TTY to bus"));
 	b->add_tty(tty_);
 
@@ -356,12 +227,7 @@ void setup() {
 	Serial.println(F(")"));
 	xTaskCreatePinnedToCore(&panel, "panel", 2048, b, 1, nullptr, 0);
 
-	memset(terminal, ' ', sizeof(terminal));
-	xTaskCreatePinnedToCore(&telnet_terminal, "telnet", 2048, b, 7, nullptr, 0);
-
-	xTaskCreatePinnedToCore(&wifi, "wifi", 2048, b, 7, nullptr, 0);
-
-	setup_wifi_stations();
+	// setup_wifi_stations();
 
 	Serial.println(F("Load RK05"));
 	b->add_rk05(new rk05("", b, &disk_read_activity, &disk_write_activity));
@@ -448,7 +314,7 @@ void loop() {
 
 	c->step();
 
-	if (event) {
+	if (event || terminate) {
 		running = false;
 
 		Serial.println(F(""));
@@ -463,6 +329,9 @@ void loop() {
 		start_ts = millis();
 		icount = 0;
 
-		running = true;
+		terminate = false;
+		event     = 0;
+
+		running   = true;
 	}
 }
diff --git a/ESP32/platformio.ini b/ESP32/platformio.ini
index fcc4e12..93ccaf2 100644
--- a/ESP32/platformio.ini
+++ b/ESP32/platformio.ini
@@ -16,5 +16,5 @@ monitor_speed = 115200
 upload_speed = 1000000
 lib_deps = greiman/SdFat@^2.1.2
 	adafruit/Adafruit NeoPixel@^1.10.4
-build_flags = -std=gnu++17 -Ofast -DESP32=1
+build_flags = -std=c++17 -Ofast -DESP32=1
 build_unflags = -std=gnu++11 -Os
diff --git a/console.cpp b/console.cpp
new file mode 100644
index 0000000..6fc73a2
--- /dev/null
+++ b/console.cpp
@@ -0,0 +1,47 @@
+#include "console.h"
+
+
+console::console(std::atomic_bool *const terminate) :
+	terminate(terminate)
+{
+	th = new std::thread(std::ref(*this));
+}
+
+console::~console()
+{
+	th->join();
+
+	delete th;
+}
+
+bool console::poll_char()
+{
+	return buffer.empty() == false;
+}
+
+uint8_t console::get_char()
+{
+	if (buffer.empty())
+		return 0x00;
+
+	char c = buffer.at(0);
+
+	buffer.erase(buffer.begin() + 0);
+
+	return c;
+}
+
+void console::operator()()
+{
+	while(!*terminate) {
+		int c = wait_for_char(500);
+
+		if (c == -1)
+			continue;
+
+		if (c == 3)
+			*terminate = true;
+		else
+			buffer.push_back(c);
+	}
+}
diff --git a/console.h b/console.h
new file mode 100644
index 0000000..958462e
--- /dev/null
+++ b/console.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <atomic>
+#include <thread>
+#include <vector>
+
+
+class console
+{
+private:
+	std::atomic_bool *const terminate   { nullptr };
+
+	std::thread            *th          { nullptr };
+
+	std::vector<char>       buffer;
+
+protected:
+	virtual int wait_for_char(const int timeout) = 0;
+
+public:
+	console(std::atomic_bool *const terminate);
+	virtual ~console();
+
+	bool    poll_char();
+
+	uint8_t get_char();
+
+	virtual void put_char(const char c) = 0;
+
+	virtual void resize_terminal() = 0;
+
+	void    operator()();
+};
diff --git a/console_ncurses.cpp b/console_ncurses.cpp
new file mode 100644
index 0000000..bd3c0fd
--- /dev/null
+++ b/console_ncurses.cpp
@@ -0,0 +1,69 @@
+#include <poll.h>
+#include <stdio.h>
+#include <ncurses.h>
+#include <unistd.h>
+
+#include "console_ncurses.h"
+#include "error.h"
+
+
+console_ncurses::console_ncurses(std::atomic_bool *const terminate) : console(terminate)
+{
+	init_ncurses(true);
+
+	resize_terminal();
+}
+
+console_ncurses::~console_ncurses()
+{
+	wprintw(w_main->win, "\n\n *** PRESS ENTER TO TERMINATE ***\n");
+	mydoupdate();
+
+	while(getch() != 13) {
+	}
+
+	endwin();
+}
+
+int console_ncurses::wait_for_char(const int timeout)
+{
+	struct pollfd fds[] = { { STDIN_FILENO, POLLIN, timeout } };
+
+	if (poll(fds, 1, 0) == 1 && fds[0].revents)
+		return getch();
+
+	return -1;
+}
+
+void console_ncurses::put_char(const char c)
+{
+	if (c >= 32 || (c != 12 && c != 27 && c != 13)) {
+		wprintw(w_main->win, "%c", c);
+
+		mydoupdate();
+	}
+}
+
+void console_ncurses::resize_terminal()
+{
+	determine_terminal_size();
+
+	if (ERR == resizeterm(max_y, max_x))
+		error_exit(true, "problem resizing terminal");
+
+	wresize(stdscr, max_y, max_x);
+
+	endwin();
+	refresh();
+
+	wclear(stdscr);
+
+	delete_window(w_main_b);
+	delete_window(w_main);
+
+	create_win_border(0, 0, max_x - 2, max_y - 2, "window", &w_main_b, &w_main, false);
+
+	scrollok(w_main -> win, TRUE);
+
+	mydoupdate();
+}
diff --git a/console_ncurses.h b/console_ncurses.h
new file mode 100644
index 0000000..a255bc5
--- /dev/null
+++ b/console_ncurses.h
@@ -0,0 +1,23 @@
+#include <ncurses.h>
+
+#include "console.h"
+#include "terminal.h"
+
+
+class console_ncurses : public console
+{
+private:
+	NEWWIN *w_main_b     { nullptr };
+	NEWWIN *w_main       { nullptr };
+
+protected:
+	int wait_for_char(const int timeout) override;
+
+public:
+	console_ncurses(std::atomic_bool *const terminate);
+	virtual ~console_ncurses();
+
+	void put_char(const char c) override;
+
+	void resize_terminal() override;
+};
diff --git a/console_posix.cpp b/console_posix.cpp
new file mode 100644
index 0000000..581883b
--- /dev/null
+++ b/console_posix.cpp
@@ -0,0 +1,47 @@
+#include <poll.h>
+#include <stdio.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "console_posix.h"
+#include "error.h"
+
+
+console_posix::console_posix(std::atomic_bool *const terminate) : console(terminate)
+{
+	if (tcgetattr(STDIN_FILENO, &org_tty_opts) == -1)
+		error_exit(true, "console_posix: tcgetattr failed");
+
+	struct termios tty_opts_raw { 0 };
+	cfmakeraw(&tty_opts_raw);
+
+	if (tcsetattr(STDIN_FILENO, TCSANOW, &tty_opts_raw) == -1)
+		error_exit(true, "console_posix: tcsetattr failed");
+}
+
+console_posix::~console_posix()
+{
+	if (tcsetattr(STDIN_FILENO, TCSANOW, &org_tty_opts) == -1)
+		error_exit(true, "~console_posix: tcsetattr failed");
+}
+
+int console_posix::wait_for_char(const int timeout)
+{
+	struct pollfd fds[] = { { STDIN_FILENO, POLLIN, timeout } };
+
+	if (poll(fds, 1, 0) == 1 && fds[0].revents)
+		return getchar();
+
+	return -1;
+}
+
+void console_posix::put_char(const char c)
+{
+	printf("%c", c);
+
+	fflush(nullptr);
+}
+
+void console_posix::resize_terminal()
+{
+}
diff --git a/console_posix.h b/console_posix.h
new file mode 100644
index 0000000..7722576
--- /dev/null
+++ b/console_posix.h
@@ -0,0 +1,21 @@
+#include <termios.h>
+
+#include "console.h"
+
+
+class console_posix : public console
+{
+private:
+	struct termios org_tty_opts { 0 };
+
+protected:
+	int wait_for_char(const int timeout) override;
+
+public:
+	console_posix(std::atomic_bool *const terminate);
+	virtual ~console_posix();
+
+	void put_char(const char c) override;
+
+	void resize_terminal() override;
+};
diff --git a/cpu.cpp b/cpu.cpp
index 4ef38d0..5f96640 100644
--- a/cpu.cpp
+++ b/cpu.cpp
@@ -878,7 +878,7 @@ bool cpu::single_operand_instructions(const uint16_t instr)
 					 setPSW_z(v == 0);
 					 setPSW_v(false);
 
-					 fprintf(stderr, "MTP%c: address %06o, value %06o\n", word_mode ? 'D' : 'I', a, v);
+					 D(fprintf(stderr, "MTP%c: address %06o, value %06o\n", word_mode ? 'D' : 'I', a, v);)
 
 					 if (dst_mode == 0)
 						 putGAM(dst_mode, dst_reg, false, v, false); // ???
diff --git a/main.cpp b/main.cpp
index 8989b4e..7e9329e 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,14 +1,14 @@
 // (C) 2018-2022 by Folkert van Heusden
 // Released under Apache License v2.0
 #include <atomic>
-#include <poll.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
-#include <termios.h>
 #include <unistd.h>
 
 #include "memory.h"
+#include "console_ncurses.h"
+#include "console_posix.h"
 #include "cpu.h"
 #include "tty.h"
 #include "utils.h"
@@ -16,20 +16,11 @@
 #include "terminal.h"
 #include "error.h"
 
-struct termios   org_tty_opts { 0 };
 bool             withUI       { false };
 uint32_t         event        { 0 };
 std::atomic_bool terminate    { false };
 
 
-void reset_terminal()
-{
-	if (withUI)
-		endwin();
-	else
-		tcsetattr(STDIN_FILENO, TCSANOW, &org_tty_opts);
-}
-
 void loadbin(bus *const b, uint16_t base, const char *const file)
 {
 	FILE *fh = fopen(file, "rb");
@@ -133,30 +124,6 @@ uint16_t loadTape(bus *const b, const char *const file)
 	return start;
 }
 
-NEWWIN *w_main_b = nullptr, *w_main = nullptr;
-
-void resize_terminal()
-{
-	determine_terminal_size();
-
-	if (ERR == resizeterm(max_y, max_x))
-		error_exit(true, "problem resizing terminal");
-
-	wresize(stdscr, max_y, max_x);
-
-	endwin();
-	refresh();
-
-	wclear(stdscr);
-
-	delete_window(w_main_b);
-	delete_window(w_main);
-	create_win_border(0, 0, max_x - 2, max_y - 2, "window", &w_main_b, &w_main, false);
-	scrollok(w_main -> win, TRUE);
-
-	mydoupdate();
-}
-
 volatile bool sw = false;
 void sw_handler(int s)
 {
@@ -169,47 +136,6 @@ void sw_handler(int s)
 	}
 }
 
-bool poll_char()
-{
-	struct pollfd fds[] = { { STDIN_FILENO, POLLIN, 0 } };
-
-	return poll(fds, 1, 0) == 1 && fds[0].revents;
-}
-
-char get_char()
-{
-	char c = getchar();
-
-	if (c == 3)
-		event = 1;
-
-	return c;
-}
-
-char get_char_ui()
-{
-	char c = getch();
-
-	if (c == 3)
-		event = 1;
-
-	return c;
-}
-
-void put_char(char c)
-{
-	printf("%c", c);
-	fflush(nullptr);
-}
-
-void put_char_ui(char c)
-{
-	if (c >= 32 || (c != 12 && c != 27 && c != 13)) {
-		wprintw(w_main -> win, "%c", c);
-		mydoupdate();
-	}
-}
-
 void help()
 {
 	printf("-h       this help\n");
@@ -285,13 +211,15 @@ int main(int argc, char *argv[])
 				  return 1;
 		}
 	}
-
-	tty *tty_ = nullptr;
+	
+	console *cnsl = nullptr;
 
 	if (withUI)
-		tty_ = new tty(poll_char, get_char_ui, put_char_ui);
+		cnsl = new console_ncurses(&terminate);
 	else
-		tty_ = new tty(poll_char, get_char, put_char);
+		cnsl = new console_posix(&terminate);
+
+	tty *tty_ = new tty(cnsl);
 
 	b->add_tty(tty_);
 
@@ -306,25 +234,11 @@ int main(int argc, char *argv[])
 	sa.sa_flags = SA_RESTART;
 
 	if (withUI) {
-		init_ncurses(true);
-
 		sigaction(SIGWINCH, &sa, nullptr);
-
-		resize_terminal();
 	}
 
-	sigaction(SIGTERM , &sa, nullptr);
-	sigaction(SIGINT  , &sa, nullptr);
-
-	atexit(reset_terminal);
-
-	tcgetattr(STDIN_FILENO, &org_tty_opts);
-
-	struct termios tty_opts_raw { 0 };
-	cfmakeraw(&tty_opts_raw);
-	tcsetattr(STDIN_FILENO, TCSANOW, &tty_opts_raw);
-
-	struct pollfd fds[] = { { STDIN_FILENO, POLLIN, 0 } };
+	sigaction(SIGTERM, &sa, nullptr);
+	sigaction(SIGINT , &sa, nullptr);
 
 	uint32_t icount           = 0;
 	uint64_t total_icount     = 0;
@@ -376,11 +290,11 @@ int main(int argc, char *argv[])
 
 			fprintf(stderr, "instructions_executed: %u, took_ms: %lu, new refresh_interval: %u\n", icount, took_ms, refresh_interval);
 
-			if (withUI) {
-				mvwprintw(w_main_b -> win, 0, 24, "%.1f/s   ", icount * 1000.0 / took_ms);
-				mvwprintw(w_main_b -> win, 0, 42, "%06o", b->get_switch_register());
-				mydoupdate();
-			}
+//			if (withUI) {
+//				mvwprintw(w_main_b -> win, 0, 24, "%.1f/s   ", icount * 1000.0 / took_ms);
+//				mvwprintw(w_main_b -> win, 0, 42, "%06o", b->get_switch_register());
+//				mydoupdate();
+//			}
 
 			if (terminate)
 				event = 1;
@@ -390,8 +304,9 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	if (withUI)
-		endwin();
+	terminate = true;
+
+	delete cnsl;
 
 	fprintf(stderr, "Instructions per second: %.3f\n\n", icount * 1000.0 / (get_ms() - start));
 
diff --git a/tty.cpp b/tty.cpp
index 27f5dbc..57efe8a 100644
--- a/tty.cpp
+++ b/tty.cpp
@@ -1,11 +1,6 @@
 // (C) 2018 by Folkert van Heusden
 // // Released under Apache License v2.0
 #include <errno.h>
-#if defined(ESP32)
-#include <Arduino.h>
-#else
-#include <poll.h>
-#endif
 #include <string.h>
 #include <unistd.h>
 
@@ -14,10 +9,6 @@
 #include "memory.h"
 #include "utils.h"
 
-#if !defined(ESP32)
-#include "terminal.h"
-extern NEWWIN *w_main;
-#endif
 
 const char * const regnames[] = { 
 	"reader status ",
@@ -26,17 +17,8 @@ const char * const regnames[] = {
 	"puncher buffer"
 	};
 
-tty::tty(std::function<bool()> poll_char, std::function<uint8_t()> get_char, std::function<void(char c)> put_char) :
-	poll_char(poll_char),
-	get_char(get_char),
-	put_char(put_char)
+tty::tty(console *const c) : c(c)
 {
-#if defined(ESP32)
-	queue = xQueueCreate(10, sizeof(char));
-
-	if (queue == nullptr)
-		Serial.println(F("Problem creating TTY queue"));
-#endif
 }
 
 tty::~tty()
@@ -63,7 +45,7 @@ uint16_t tty::readWord(const uint16_t addr)
 		have_char_2 = true;
 	}
 	else if (have_char_2 == false) {
-		have_char_1 = poll_char();
+		have_char_1 = c->poll_char();
 	}
 
 	if (addr == PDP11TTY_TKS) {
@@ -71,9 +53,9 @@ uint16_t tty::readWord(const uint16_t addr)
 	}
 	else if (addr == PDP11TTY_TKB) {
 		if (have_char_2) {
-			uint8_t c = get_char();
+			uint8_t ch = c->get_char();
 
-			vtemp = c | (parity(c) << 7);
+			vtemp = ch | (parity(ch) << 7);
 
 			have_char_2 = false;
 		}
@@ -115,16 +97,11 @@ void tty::writeWord(const uint16_t addr, uint16_t v)
 	D(fprintf(stderr, "PDP11TTY write %o (%s): %o\n", addr, regnames[reg], v);)
 
 	if (addr == PDP11TTY_TPB) {
-		char c = v & 127;
+		char ch = v & 127;
 
-		D(fprintf(stderr, "PDP11TTY print '%c'\n", c);)
+		D(fprintf(stderr, "PDP11TTY print '%c'\n", ch);)
 
-#if defined(ESP32)
-		if (xQueueSend(queue, &c, portMAX_DELAY) != pdTRUE)
-			Serial.println(F("queue TTY character failed"));
-#else
-		put_char(c);
-#endif
+		c->put_char(ch);
 	}
 
 	D(fprintf(stderr, "set register %o to %o\n", addr, v);)
diff --git a/tty.h b/tty.h
index 421a74f..20d3d6f 100644
--- a/tty.h
+++ b/tty.h
@@ -2,11 +2,13 @@
 // Released under Apache License v2.0
 #pragma once
 
-#include <functional>
 #include <stdint.h>
 #include <stdio.h>
 #include <string>
 
+#include "console.h"
+
+
 #define PDP11TTY_TKS		0177560	// reader status
 #define PDP11TTY_TKB		0177562	// reader buffer
 #define PDP11TTY_TPS		0177564	// puncher status
@@ -19,26 +21,16 @@ class memory;
 class tty
 {
 private:
-	std::function<bool()>       poll_char;
-	std::function<uint8_t()>    get_char;
-	std::function<void(char c)> put_char;
+	console *const c      { nullptr };
 	bool     have_char_1  { false };  // RCVR BUSY bit high (11)
 	bool     have_char_2  { false };  // RCVR DONE bit high (7)
 	uint16_t registers[4] { 0 };
 	bool     withUI       { false };
 
-#if defined(ESP32)
-	QueueHandle_t queue { nullptr };
-#endif
-
 public:
-	tty(std::function<bool()> poll_char, std::function<uint8_t()> get_char, std::function<void(char c)> put_char);
+	tty(console *const c);
 	virtual ~tty();
 
-#if defined(ESP32)
-	QueueHandle_t & getTerminalQueue() { return queue; }
-#endif
-
 	uint8_t readByte(const uint16_t addr);
 	uint16_t readWord(const uint16_t addr);