diff --git a/dist/mu3/segatools.ini b/dist/mu3/segatools.ini
index 3279509..ef6df83 100644
--- a/dist/mu3/segatools.ini
+++ b/dist/mu3/segatools.ini
@@ -1,11 +1,11 @@
 [vfs]
 ; Insert the path to the game AMFS directory here (contains ICF1 and ICF2)
-amfs=amfs
+amfs=
 ; Create an empty directory somewhere and insert the path here.
 ; This directory may be shared between multiple SEGA games.
 ; NOTE: This has nothing to do with Windows %APPDATA%.
-appdata=appdata
-option=option
+appdata=
+option=
 
 [dns]
 ; Insert the hostname or IP address of the server you wish to use here.
@@ -40,8 +40,12 @@ enable=1
 ; Set "1" to use a xinput gamepad and set "2" to use keyboard.
 mode=2
 
+; Test button virtual-key code. Default is the 1 key.
 test=0x31
+; Service button virtual-key code. Default is the 2 key.
 service=0x32
+; Keyboard button to increment coin counter. Default is the 3 key.
+coin=0x33
 
 [dinput]
 LEFT_A=0x53
diff --git a/mu3hook/io4.c b/mu3hook/io4.c
index 7edcb0c..9515b50 100644
--- a/mu3hook/io4.c
+++ b/mu3hook/io4.c
@@ -11,6 +11,7 @@
 #include "util/dprintf.h"
 
 static HRESULT mu3_io4_poll(void *ctx, struct io4_state *state);
+static uint16_t coins;
 
 static const struct io4_ops mu3_io4_ops = {
     .poll = mu3_io4_poll,
@@ -69,6 +70,11 @@ static HRESULT mu3_io4_poll(void *ctx, struct io4_state *state)
         state->buttons[0] |= IO4_BUTTON_SERVICE;
     }
 
+    if (opbtn & MU3_IO_OPBTN_COIN) {
+        coins++;
+    }
+    state->chutes[0] = coins << 8;
+
     if (left & MU3_IO_GAMEBTN_1) {
         state->buttons[0] |= 1 << 0;
     }
diff --git a/mu3io/config.c b/mu3io/config.c
new file mode 100644
index 0000000..2fd4989
--- /dev/null
+++ b/mu3io/config.c
@@ -0,0 +1,22 @@
+#include <windows.h>
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "mu3io/config.h"
+
+void mu3_io_config_load(
+        struct mu3_io_config *cfg,
+        const wchar_t *filename)
+{
+    wchar_t key[16];
+    int i;
+
+    assert(cfg != NULL);
+    assert(filename != NULL);
+
+    cfg->vk_test = GetPrivateProfileIntW(L"io4", L"test", '1', filename);
+    cfg->vk_service = GetPrivateProfileIntW(L"io4", L"service", '2', filename);
+    cfg->vk_coin = GetPrivateProfileIntW(L"io4", L"coin", '3', filename);
+}
diff --git a/mu3io/config.h b/mu3io/config.h
new file mode 100644
index 0000000..f3632ce
--- /dev/null
+++ b/mu3io/config.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <stdbool.h>
+
+struct mu3_io_config {
+    uint8_t vk_test;
+    uint8_t vk_service;
+    uint8_t vk_coin;
+};
+
+void mu3_io_config_load(
+        struct mu3_io_config *cfg,
+        const wchar_t *filename);
diff --git a/mu3io/meson.build b/mu3io/meson.build
index 3d6e60e..0b509bd 100644
--- a/mu3io/meson.build
+++ b/mu3io/meson.build
@@ -10,5 +10,7 @@ mu3io_lib = static_library(
     sources : [
         'mu3io.c',
         'mu3io.h',
+        'config.c',
+        'config.h',
     ],
 )
diff --git a/mu3io/mu3io.c b/mu3io/mu3io.c
index 0bbd37f..775a1b4 100644
--- a/mu3io/mu3io.c
+++ b/mu3io/mu3io.c
@@ -5,12 +5,15 @@
 #include <stdint.h>
 
 #include "mu3io/mu3io.h"
+#include "mu3io/config.h"
 
 static uint8_t mu3_opbtn;
 static uint8_t mu3_left_btn;
 static uint8_t mu3_right_btn;
 static int16_t mu3_lever_pos;
 static int16_t mu3_lever_xpos;
+static struct mu3_io_config mu3_io_cfg;
+static bool mu3_io_coin;
 
 uint16_t mu3_io_get_api_version(void)
 {
@@ -19,6 +22,7 @@ uint16_t mu3_io_get_api_version(void)
 
 HRESULT mu3_io_init(void)
 {
+    mu3_io_config_load(&mu3_io_cfg, L".\\segatools.ini");
     return S_OK;
 }
 
@@ -33,14 +37,23 @@ HRESULT mu3_io_poll(void)
     mu3_left_btn = 0;
     mu3_right_btn = 0;
 
-    if (GetAsyncKeyState('1') & 0x8000) {
+    if (GetAsyncKeyState(mu3_io_cfg.vk_test) & 0x8000) {
         mu3_opbtn |= MU3_IO_OPBTN_TEST;
     }
 
-    if (GetAsyncKeyState('2') & 0x8000) {
+    if (GetAsyncKeyState(mu3_io_cfg.vk_service) & 0x8000) {
         mu3_opbtn |= MU3_IO_OPBTN_SERVICE;
     }
 
+    if (GetAsyncKeyState(mu3_io_cfg.vk_coin) & 0x8000) {
+        if (!mu3_io_coin) {
+            mu3_io_coin = true;
+            mu3_opbtn |= MU3_IO_OPBTN_COIN;
+        }
+    } else {
+        mu3_io_coin = false;
+    }
+
     memset(&xi, 0, sizeof(xi));
     XInputGetState(0, &xi);
     xb = xi.Gamepad.wButtons;
diff --git a/mu3io/mu3io.h b/mu3io/mu3io.h
index d46a475..a156038 100644
--- a/mu3io/mu3io.h
+++ b/mu3io/mu3io.h
@@ -7,6 +7,7 @@
 enum {
     MU3_IO_OPBTN_TEST = 0x01,
     MU3_IO_OPBTN_SERVICE = 0x02,
+    MU3_IO_OPBTN_COIN = 0x04,
 };
 
 enum {