diff --git a/src/mame/miltonbradley/vectrex.cpp b/src/mame/miltonbradley/vectrex.cpp
index 80a1b1de..2a558407 100644
--- a/src/mame/miltonbradley/vectrex.cpp
+++ b/src/mame/miltonbradley/vectrex.cpp
@@ -114,7 +114,7 @@ void vectrex_base_state::vectrex_base(machine_config &config)
 	MC1408(config, m_dac, 0).add_route(ALL_OUTPUTS, "speaker", 0.25); // mc1408.ic301 (also used for vector generation)
 
 	AY8912(config, m_ay8912, 6_MHz_XTAL / 4);
-	m_ay8912->port_a_read_callback().set_ioport("BUTTONS");
+	m_ay8912->port_a_read_callback().set(FUNC(vectrex_base_state::buttons_r));
 	m_ay8912->port_a_write_callback().set(FUNC(vectrex_base_state::psg_port_w));
 	m_ay8912->add_route(ALL_OUTPUTS, "speaker", 0.2);
 
diff --git a/src/mame/miltonbradley/vectrex.h b/src/mame/miltonbradley/vectrex.h
index 48c803ca..10efd4f6 100644
--- a/src/mame/miltonbradley/vectrex.h
+++ b/src/mame/miltonbradley/vectrex.h
@@ -62,6 +62,7 @@ protected:
 	void update_vector();
 	uint8_t via_pb_r();
 	uint8_t via_pa_r();
+	uint8_t buttons_r();
 	void via_pb_w(uint8_t data);
 	void via_pa_w(uint8_t data);
 	void via_ca2_w(int state);
diff --git a/src/mame/miltonbradley/vectrex_m.cpp b/src/mame/miltonbradley/vectrex_m.cpp
index e47e698b..27a50cbc 100644
--- a/src/mame/miltonbradley/vectrex_m.cpp
+++ b/src/mame/miltonbradley/vectrex_m.cpp
@@ -2,6 +2,8 @@
 // copyright-holders:Mathis Rosenhauer
 
 #include "emu.h"
+
+#include <emscripten.h>
 #include "vectrex.h"
 
 #include "cpu/m6809/m6809.h"
@@ -174,9 +176,32 @@ void vectrex_base_state::via_irq(int state)
 }
 
 
+/* Game controllers and touch controls, set by the page once per browser frame.
+   Sticks are -127 to 127, up and right positive. A stick at 0 leaves the keys
+   in charge. Buttons: bits 0-3 controller 1, bits 4-7 controller 2. */
+static int8_t s_web_stick[4];
+static uint8_t s_web_buttons;
+
+extern "C" EMSCRIPTEN_KEEPALIVE void vectrex_web_input(int x1, int y1, int x2, int y2, int buttons)
+{
+	s_web_stick[0] = x1;
+	s_web_stick[1] = y1;
+	s_web_stick[2] = x2;
+	s_web_stick[3] = y2;
+	s_web_buttons = buttons;
+}
+
+
+uint8_t vectrex_base_state::buttons_r()
+{
+	return m_io_buttons->read() & ~s_web_buttons;
+}
+
+
 uint8_t vectrex_base_state::via_pb_r()
 {
-	int pot = m_io_contr[(m_via_out[PORTB] & 0x6) >> 1]->read() - 0x80;
+	const int axis = (m_via_out[PORTB] & 0x6) >> 1;
+	int pot = s_web_stick[axis] ? s_web_stick[axis] : m_io_contr[axis]->read() - 0x80;
 
 	if (pot > (signed char)m_via_out[PORTA])
 		m_via_out[PORTB] |= 0x20;