diff --git a/README.md b/README.md
index 4f48d8d..7077fde 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,12 @@ Loaders and hardware emulators for SEGA games that run on the Nu and ALLS platfo
   * Initial D The Arcade
 * SEGA World Drivers Championship
   * SEGA World Drivers Championship 2019
+* ONGEKI
+  * bright MEMORY
+* maimai DX
+  * maimai DX FESTiVAL
+* Card Maker
+  * Card Maker 1.35
 * Wacca
   * Wacca Lilly R (WIP)
 
diff --git a/dist/mai2/segatools.ini b/dist/mai2/segatools.ini
new file mode 100644
index 0000000..8676568
--- /dev/null
+++ b/dist/mai2/segatools.ini
@@ -0,0 +1,70 @@
+[vfs]
+; Insert the path to the game AMFS directory here (contains ICF1 and ICF2)
+amfs=
+; Insert the path to the game Option directory here (contains Axxx, Bxxx directories)
+option=
+; 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=
+
+[aime]
+; Enable aime reader emulation.
+enable=1
+
+[dns]
+; Insert the hostname or IP address of the server you wish to use here.
+; Note that 127.0.0.1, localhost etc are specifically rejected.
+default=
+
+[netenv]
+; Simulate an ideal LAN environment. This may interfere with head-to-head play.
+; SEGA games are somewhat picky about its LAN environment, so leaving this
+; setting enabled is recommended.
+enable=1
+
+[keychip]
+; The /24 LAN subnet that the emulated keychip will tell the game to expect.
+; If you disable netenv then you must set this to your LAN's IP subnet, and
+; that subnet must start with 192.168.
+subnet=192.168.100.0
+
+; -----------------------------------------------------------------------------
+; Input settings
+; -----------------------------------------------------------------------------
+
+; Keyboard bindings are specified as hexadecimal (prefixed with 0x) or decimal
+; (not prefixed with 0x) virtual-key codes, a list of which can be found here:
+;
+; https://docs.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes
+;
+; This is, admittedly, not the most user-friendly configuration method in the
+; world. An improved solution will be provided later.
+
+[io4]
+; 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
+
+; Key bindings for buttons around screen. The default key map, depicted
+; in clockwise order, is as follows:
+;
+; Player 1 Ring buttons: WEDCXZAQ, Select button: 3
+; Player 2 Ring buttons: (Numpad) 89632147, Select button: (Numpad) *
+;
+; Select buttons are considered as button 9.
+;
+; Uncomment and complete the following sequence of settings to configure a
+; custom keybinding.
+[button]
+;1p_btn1=0x53
+;1p_btn2=0x53
+;1p_btn3=0x53
+; ... etc ...
+;2p_btn1=0x53
+;2p_btn2=0x53
+;2p_btn3=0x53
+; ... etc ...
diff --git a/dist/mai2/start.bat b/dist/mai2/start.bat
new file mode 100644
index 0000000..a89a1d5
--- /dev/null
+++ b/dist/mai2/start.bat
@@ -0,0 +1,11 @@
+@echo off
+
+pushd %~dp0
+
+start /min inject -d -k mai2hook.dll amdaemon.exe -f -c config_common.json config_server.json config_client.json
+inject -d -k mai2hook.dll sinmai -screen-fullscreen 0
+taskkill /f /im amdaemon.exe > nul 2>&1
+
+echo.
+echo Game processes have terminated
+pause
\ No newline at end of file
diff --git a/mai2hook/config.c b/mai2hook/config.c
new file mode 100644
index 0000000..87615e9
--- /dev/null
+++ b/mai2hook/config.c
@@ -0,0 +1,41 @@
+#include <assert.h>
+#include <stddef.h>
+
+#include "board/config.h"
+
+#include "hooklib/config.h"
+#include "hooklib/dvd.h"
+
+#include "mai2hook/config.h"
+
+#include "platform/config.h"
+
+void mai2_dll_config_load(
+        struct mai2_dll_config *cfg,
+        const wchar_t *filename)
+{
+    assert(cfg != NULL);
+    assert(filename != NULL);
+
+    GetPrivateProfileStringW(
+            L"mai2io",
+            L"path",
+            L"",
+            cfg->path,
+            _countof(cfg->path),
+            filename);
+}
+
+void mai2_hook_config_load(
+        struct mai2_hook_config *cfg,
+        const wchar_t *filename)
+{
+    assert(cfg != NULL);
+    assert(filename != NULL);
+
+    platform_config_load(&cfg->platform, filename);
+    aime_config_load(&cfg->aime, filename);
+    dvd_config_load(&cfg->dvd, filename);
+    io4_config_load(&cfg->io4, filename);
+    mai2_dll_config_load(&cfg->dll, filename);
+}
diff --git a/mai2hook/config.h b/mai2hook/config.h
new file mode 100644
index 0000000..3b7fc22
--- /dev/null
+++ b/mai2hook/config.h
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <stddef.h>
+
+#include "board/config.h"
+
+#include "hooklib/dvd.h"
+
+#include "mai2hook/mai2-dll.h"
+
+#include "platform/config.h"
+
+struct mai2_hook_config {
+    struct platform_config platform;
+    struct aime_config aime;
+    struct dvd_config dvd;
+    struct io4_config io4;
+    struct mai2_dll_config dll;
+};
+
+void mai2_dll_config_load(
+        struct mai2_dll_config *cfg,
+        const wchar_t *filename);
+
+void mai2_hook_config_load(
+        struct mai2_hook_config *cfg,
+        const wchar_t *filename);
diff --git a/mai2hook/dllmain.c b/mai2hook/dllmain.c
new file mode 100644
index 0000000..3232d6c
--- /dev/null
+++ b/mai2hook/dllmain.c
@@ -0,0 +1,116 @@
+#include <windows.h>
+
+#include "board/io4.h"
+#include "board/sg-reader.h"
+#include "board/vfd.h"
+
+#include "hook/process.h"
+
+#include "hooklib/serial.h"
+#include "hooklib/spike.h"
+
+#include "mai2hook/config.h"
+#include "mai2hook/io4.h"
+#include "mai2hook/mai2-dll.h"
+#include "mai2hook/unity.h"
+
+#include "platform/platform.h"
+
+#include "util/dprintf.h"
+
+static HMODULE mai2_hook_mod;
+static process_entry_t mai2_startup;
+static struct mai2_hook_config mai2_hook_cfg;
+
+/* This hook is based on mu3hook, with leaked mai2hook i/o codes. */
+
+static DWORD CALLBACK mai2_pre_startup(void)
+{
+    HRESULT hr;
+
+    dprintf("--- Begin mai2_pre_startup ---\n");
+
+    /* Load config */
+
+    mai2_hook_config_load(&mai2_hook_cfg, L".\\segatools.ini");
+
+    /* Hook Win32 APIs */
+
+    dvd_hook_init(&mai2_hook_cfg.dvd, mai2_hook_mod);
+    serial_hook_init();
+
+    /* Initialize emulation hooks */
+
+    hr = platform_hook_init(
+            &mai2_hook_cfg.platform,
+            "SDEZ",
+            "ACA1",
+            mai2_hook_mod);
+
+    if (FAILED(hr)) {
+        goto fail;
+    }
+
+    hr = sg_reader_hook_init(&mai2_hook_cfg.aime, 1, mai2_hook_mod);
+
+    if (FAILED(hr)) {
+        goto fail;
+    }
+
+    hr = vfd_hook_init(2);
+
+    if (FAILED(hr)) {
+        goto fail;
+    }
+
+    hr = mai2_dll_init(&mai2_hook_cfg.dll, mai2_hook_mod);
+
+    if (FAILED(hr)) {
+        goto fail;
+    }
+
+    hr = mai2_io4_hook_init(&mai2_hook_cfg.io4);
+
+    if (FAILED(hr)) {
+        goto fail;
+    }
+
+    /* Initialize Unity native plugin DLL hooks
+
+       There seems to be an issue with other DLL hooks if `LoadLibraryW` is
+       hooked earlier in the `mai2hook` initialization. */
+
+    unity_hook_init();
+
+    /* Initialize debug helpers */
+
+    spike_hook_init(L".\\segatools.ini");
+
+    dprintf("---  End  mai2_pre_startup ---\n");
+
+    /* Jump to EXE start address */
+
+    return mai2_startup();
+
+fail:
+    ExitProcess(EXIT_FAILURE);
+}
+
+BOOL WINAPI DllMain(HMODULE mod, DWORD cause, void *ctx)
+{
+    HRESULT hr;
+
+    if (cause != DLL_PROCESS_ATTACH) {
+        return TRUE;
+    }
+
+    mai2_hook_mod = mod;
+
+    hr = process_hijack_startup(mai2_pre_startup, &mai2_startup);
+
+    if (!SUCCEEDED(hr)) {
+        dprintf("Failed to hijack process startup: %x\n", (int) hr);
+    }
+
+    return SUCCEEDED(hr);
+}
diff --git a/mai2hook/io4.c b/mai2hook/io4.c
new file mode 100644
index 0000000..4eb7f6b
--- /dev/null
+++ b/mai2hook/io4.c
@@ -0,0 +1,153 @@
+#include <windows.h>
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "board/io4.h"
+
+#include "mai2hook/mai2-dll.h"
+
+#include "util/dprintf.h"
+
+static HRESULT mai2_io4_poll(void *ctx, struct io4_state *state);
+static uint16_t coins;
+
+static const struct io4_ops mai2_io4_ops = {
+    .poll = mai2_io4_poll,
+};
+
+HRESULT mai2_io4_hook_init(const struct io4_config *cfg)
+{
+    HRESULT hr;
+
+    assert(mai2_dll.init != NULL);
+
+    hr = io4_hook_init(cfg, &mai2_io4_ops, NULL);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    return mai2_dll.init();
+}
+
+static HRESULT mai2_io4_poll(void *ctx, struct io4_state *state)
+{
+    uint8_t opbtn;
+    uint16_t player1;
+    uint16_t player2;
+    HRESULT hr;
+
+    assert(mai2_dll.poll != NULL);
+    assert(mai2_dll.get_opbtns != NULL);
+    assert(mai2_dll.get_gamebtns != NULL);
+
+    memset(state, 0, sizeof(*state));
+
+    hr = mai2_dll.poll();
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    opbtn = 0;
+    player1 = 0;
+    player2 = 0;
+
+    mai2_dll.get_opbtns(&opbtn);
+    mai2_dll.get_gamebtns(&player1, &player2);
+
+    if (opbtn & MAI2_IO_OPBTN_TEST) {
+        state->buttons[0] |= IO4_BUTTON_TEST;
+    }
+
+    if (opbtn & MAI2_IO_OPBTN_SERVICE) {
+        state->buttons[0] |= IO4_BUTTON_SERVICE;
+    }
+
+    if (opbtn & MAI2_IO_OPBTN_COIN) {
+        coins++;
+    }
+    state->chutes[0] = coins << 8;
+
+    // Buttons around screen are active-low, select button is active-high
+
+    // Player 1
+
+    if (!(player1 & MAI2_IO_GAMEBTN_1)) {
+        state->buttons[0] |= 1 << 2;
+    }
+
+    if (!(player1 & MAI2_IO_GAMEBTN_2)) {
+        state->buttons[0] |= 1 << 3;
+    }
+
+    if (!(player1 & MAI2_IO_GAMEBTN_3)) {
+        state->buttons[0] |= 1 << 0;
+    }
+
+    if (!(player1 & MAI2_IO_GAMEBTN_4)) {
+        state->buttons[0] |= 1 << 15;
+    }
+
+    if (!(player1 & MAI2_IO_GAMEBTN_5)) {
+        state->buttons[0] |= 1 << 14;
+    }
+
+    if (!(player1 & MAI2_IO_GAMEBTN_6)) {
+        state->buttons[0] |= 1 << 13;
+    }
+
+    if (!(player1 & MAI2_IO_GAMEBTN_7)) {
+        state->buttons[0] |= 1 << 12;
+    }
+
+    if (!(player1 & MAI2_IO_GAMEBTN_8)) {
+        state->buttons[0] |= 1 << 11;
+    }
+
+    if (player1 & MAI2_IO_GAMEBTN_SELECT) {
+        state->buttons[0] |= 1 << 1;
+    }
+
+    // Player 2
+
+    if (!(player2 & MAI2_IO_GAMEBTN_1)) {
+        state->buttons[1] |= 1 << 2;
+    }
+
+    if (!(player2 & MAI2_IO_GAMEBTN_2)) {
+        state->buttons[1] |= 1 << 3;
+    }
+
+    if (!(player2 & MAI2_IO_GAMEBTN_3)) {
+        state->buttons[1] |= 1 << 0;
+    }
+
+    if (!(player2 & MAI2_IO_GAMEBTN_4)) {
+        state->buttons[1] |= 1 << 15;
+    }
+
+    if (!(player2 & MAI2_IO_GAMEBTN_5)) {
+        state->buttons[1] |= 1 << 14;
+    }
+
+    if (!(player2 & MAI2_IO_GAMEBTN_6)) {
+        state->buttons[1] |= 1 << 13;
+    }
+
+    if (!(player2 & MAI2_IO_GAMEBTN_7)) {
+        state->buttons[1] |= 1 << 12;
+    }
+
+    if (!(player2 & MAI2_IO_GAMEBTN_8)) {
+        state->buttons[1] |= 1 << 11;
+    }
+
+    if (player2 & MAI2_IO_GAMEBTN_SELECT) {
+        state->buttons[1] |= 1 << 4;
+    }
+
+    return S_OK;
+}
diff --git a/mai2hook/io4.h b/mai2hook/io4.h
new file mode 100644
index 0000000..5a0a2a0
--- /dev/null
+++ b/mai2hook/io4.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include <windows.h>
+
+#include "board/io4.h"
+
+HRESULT mai2_io4_hook_init(const struct io4_config *cfg);
diff --git a/mai2hook/mai2-dll.c b/mai2hook/mai2-dll.c
new file mode 100644
index 0000000..dd172c3
--- /dev/null
+++ b/mai2hook/mai2-dll.c
@@ -0,0 +1,109 @@
+#include <windows.h>
+
+#include <assert.h>
+#include <stdlib.h>
+
+#include "mai2hook/mai2-dll.h"
+
+#include "util/dll-bind.h"
+#include "util/dprintf.h"
+
+const struct dll_bind_sym mai2_dll_syms[] = {
+    {
+        .sym = "mai2_io_init",
+        .off = offsetof(struct mai2_dll, init),
+    }, {
+        .sym = "mai2_io_poll",
+        .off = offsetof(struct mai2_dll, poll),
+    }, {
+        .sym = "mai2_io_get_opbtns",
+        .off = offsetof(struct mai2_dll, get_opbtns),
+    }, {
+        .sym = "mai2_io_get_gamebtns",
+        .off = offsetof(struct mai2_dll, get_gamebtns),
+    }
+};
+
+struct mai2_dll mai2_dll;
+
+// Copypasta DLL binding and diagnostic message boilerplate.
+// Not much of this lends itself to being easily factored out. Also there
+// will be a lot of API-specific branching code here eventually as new API
+// versions get defined, so even though these functions all look the same
+// now this won't remain the case forever.
+
+HRESULT mai2_dll_init(const struct mai2_dll_config *cfg, HINSTANCE self)
+{
+    uint16_t (*get_api_version)(void);
+    const struct dll_bind_sym *sym;
+    HINSTANCE owned;
+    HINSTANCE src;
+    HRESULT hr;
+
+    assert(cfg != NULL);
+    assert(self != NULL);
+
+    if (cfg->path[0] != L'\0') {
+        owned = LoadLibraryW(cfg->path);
+
+        if (owned == NULL) {
+            hr = HRESULT_FROM_WIN32(GetLastError());
+            dprintf("Maimai DX IO: Failed to load IO DLL: %lx: %S\n",
+                    hr,
+                    cfg->path);
+
+            goto end;
+        }
+
+        dprintf("Maimai DX IO: Using custom IO DLL: %S\n", cfg->path);
+        src = owned;
+    } else {
+        owned = NULL;
+        src = self;
+    }
+
+    get_api_version = (void *) GetProcAddress(src, "mai2_io_get_api_version");
+
+    if (get_api_version != NULL) {
+        mai2_dll.api_version = get_api_version();
+    } else {
+        mai2_dll.api_version = 0x0100;
+        dprintf("Custom IO DLL does not expose mai2_io_get_api_version, "
+                "assuming API version 1.0.\n"
+                "Please ask the developer to update their DLL.\n");
+    }
+
+    if (mai2_dll.api_version >= 0x0200) {
+        hr = E_NOTIMPL;
+        dprintf("Maimai DX IO: Custom IO DLL implements an unsupported "
+                "API version (%#04x). Please update Segatools.\n",
+                mai2_dll.api_version);
+
+        goto end;
+    }
+
+    sym = mai2_dll_syms;
+    hr = dll_bind(&mai2_dll, src, &sym, _countof(mai2_dll_syms));
+
+    if (FAILED(hr)) {
+        if (src != self) {
+            dprintf("Maimai DX IO: Custom IO DLL does not provide function "
+                    "\"%s\". Please contact your IO DLL's developer for "
+                    "further assistance.\n",
+                    sym->sym);
+
+            goto end;
+        } else {
+            dprintf("Internal error: could not reflect \"%s\"\n", sym->sym);
+        }
+    }
+
+    owned = NULL;
+
+end:
+    if (owned != NULL) {
+        FreeLibrary(owned);
+    }
+
+    return hr;
+}
diff --git a/mai2hook/mai2-dll.h b/mai2hook/mai2-dll.h
new file mode 100644
index 0000000..6e53454
--- /dev/null
+++ b/mai2hook/mai2-dll.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <windows.h>
+
+#include "mai2io/mai2io.h"
+
+struct mai2_dll {
+    uint16_t api_version;
+    HRESULT (*init)(void);
+    HRESULT (*poll)(void);
+    void (*get_opbtns)(uint8_t *opbtn);
+    void (*get_gamebtns)(uint16_t *player1, uint16_t *player2);
+};
+
+struct mai2_dll_config {
+    wchar_t path[MAX_PATH];
+};
+
+extern struct mai2_dll mai2_dll;
+
+HRESULT mai2_dll_init(const struct mai2_dll_config *cfg, HINSTANCE self);
diff --git a/mai2hook/mai2hook.def b/mai2hook/mai2hook.def
new file mode 100644
index 0000000..2d0ac8b
--- /dev/null
+++ b/mai2hook/mai2hook.def
@@ -0,0 +1,18 @@
+LIBRARY mai2hook
+
+EXPORTS
+    aime_io_get_api_version
+    aime_io_init
+    aime_io_led_set_color
+    aime_io_nfc_get_aime_id
+    aime_io_nfc_get_felica_id
+    aime_io_nfc_poll
+    amDllVideoClose @2
+    amDllVideoGetVBiosVersion @4
+    amDllVideoOpen @1
+    amDllVideoSetResolution @3
+    mai2_io_get_api_version
+    mai2_io_get_gamebtns
+    mai2_io_get_opbtns
+    mai2_io_init
+    mai2_io_poll
\ No newline at end of file
diff --git a/mai2hook/meson.build b/mai2hook/meson.build
new file mode 100644
index 0000000..8578c51
--- /dev/null
+++ b/mai2hook/meson.build
@@ -0,0 +1,31 @@
+shared_library(
+    'mai2hook',
+    name_prefix : '',
+    include_directories : inc,
+    implicit_include_directories : false,
+    vs_module_defs : 'mai2hook.def',
+    c_pch : '../precompiled.h',
+    dependencies : [
+        capnhook.get_variable('hook_dep'),
+        capnhook.get_variable('hooklib_dep'),
+    ],
+    link_with : [
+        aimeio_lib,
+        board_lib,
+        hooklib_lib,
+        mai2io_lib,
+        platform_lib,
+        util_lib,
+    ],
+    sources : [
+        'config.c',
+        'config.h',
+        'dllmain.c',
+        'io4.c',
+        'io4.h',
+        'mai2-dll.c',
+        'mai2-dll.h',
+        'unity.h',
+        'unity.c',
+    ],
+)
diff --git a/mai2hook/unity.c b/mai2hook/unity.c
new file mode 100644
index 0000000..64195be
--- /dev/null
+++ b/mai2hook/unity.c
@@ -0,0 +1,95 @@
+#include <stdbool.h>
+
+#include <windows.h>
+
+#include "hook/table.h"
+
+#include "hooklib/dll.h"
+#include "hooklib/path.h"
+
+#include "util/dprintf.h"
+
+static void dll_hook_insert_hooks(HMODULE target);
+
+static HMODULE WINAPI my_LoadLibraryW(const wchar_t *name);
+static HMODULE (WINAPI *next_LoadLibraryW)(const wchar_t *name);
+
+static const struct hook_symbol unity_kernel32_syms[] = {
+    {
+        .name = "LoadLibraryW",
+        .patch = my_LoadLibraryW,
+        .link = (void **) &next_LoadLibraryW,
+    },
+};
+
+static const wchar_t *target_modules[] = {
+    L"mono-2.0-bdwgc.dll",
+    L"cri_ware_unity.dll",
+};
+static const size_t target_modules_len = _countof(target_modules);
+
+void unity_hook_init(void)
+{
+    dll_hook_insert_hooks(NULL);
+}
+
+static void dll_hook_insert_hooks(HMODULE target)
+{
+    hook_table_apply(
+            target,
+            "kernel32.dll",
+            unity_kernel32_syms,
+            _countof(unity_kernel32_syms));
+}
+
+static HMODULE WINAPI my_LoadLibraryW(const wchar_t *name)
+{
+    const wchar_t *name_end;
+    const wchar_t *target_module;
+    bool already_loaded;
+    HMODULE result;
+    size_t name_len;
+    size_t target_module_len;
+
+    if (name == NULL) {
+        SetLastError(ERROR_INVALID_PARAMETER);
+
+        return NULL;
+    }
+
+    // Check if the module is already loaded
+    already_loaded = GetModuleHandleW(name) != NULL;
+
+    // Must call the next handler so the DLL reference count is incremented
+    result = next_LoadLibraryW(name);
+
+    if (!already_loaded && result != NULL) {
+        name_len = wcslen(name);
+
+        for (size_t i = 0; i < target_modules_len; i++) {
+            target_module = target_modules[i];
+            target_module_len = wcslen(target_module);
+
+            // Check if the newly loaded library is at least the length of
+            // the name of the target module
+            if (name_len < target_module_len) {
+                continue;
+            }
+
+            name_end = &name[name_len - target_module_len];
+
+            // Check if the name of the newly loaded library is one of the
+            // modules the path hooks should be injected into
+            if (_wcsicmp(name_end, target_module) != 0) {
+                continue;
+            }
+
+            dprintf("Unity: Loaded %S\n", target_module);
+
+            dll_hook_insert_hooks(result);
+            path_hook_insert_hooks(result);
+        }
+    }
+
+    return result;
+}
diff --git a/mai2hook/unity.h b/mai2hook/unity.h
new file mode 100644
index 0000000..99c3bd9
--- /dev/null
+++ b/mai2hook/unity.h
@@ -0,0 +1,3 @@
+#pragma once
+
+void unity_hook_init(void);
diff --git a/mai2io/config.c b/mai2io/config.c
new file mode 100644
index 0000000..75e842a
--- /dev/null
+++ b/mai2io/config.c
@@ -0,0 +1,48 @@
+#include <windows.h>
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "mai2io/config.h"
+
+/*
+Maimai DX Default key binding
+1P: self-explanatory
+2P: (Numpad) 8, 9, 6, 3, 2, 1, 4, 7, *
+*/
+static const int mai2_io_1p_default[] = {'W', 'E', 'D', 'C', 'X', 'Z', 'A', 'Q', '3'};
+static const int mai2_io_2p_default[] = {0x68, 0x69, 0x66, 0x63, 0x62, 0x61, 0x64, 0x67, 0x54};
+
+void mai2_io_config_load(
+        struct mai2_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);
+
+    for (i = 0 ; i < 9 ; i++) {
+        swprintf_s(key, _countof(key), L"1p_btn%i", i + 1);
+        cfg->vk_1p_btn[i] = GetPrivateProfileIntW(
+                L"button",
+                key,
+                mai2_io_1p_default[i],
+                filename);
+    }
+
+    for (i = 0 ; i < 9 ; i++) {
+        swprintf_s(key, _countof(key), L"2p_btn%i", i + 1);
+        cfg->vk_2p_btn[i] = GetPrivateProfileIntW(
+                L"button",
+                key,
+                mai2_io_2p_default[i],
+                filename);
+    }
+}
diff --git a/mai2io/config.h b/mai2io/config.h
new file mode 100644
index 0000000..568b832
--- /dev/null
+++ b/mai2io/config.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <stdbool.h>
+
+struct mai2_io_config {
+    uint8_t vk_test;
+    uint8_t vk_service;
+    uint8_t vk_coin;
+    uint8_t vk_1p_btn[9];
+    uint8_t vk_2p_btn[9];
+};
+
+void mai2_io_config_load(
+        struct mai2_io_config *cfg,
+        const wchar_t *filename);
diff --git a/mai2io/mai2io.c b/mai2io/mai2io.c
new file mode 100644
index 0000000..40d6bfb
--- /dev/null
+++ b/mai2io/mai2io.c
@@ -0,0 +1,143 @@
+#include <windows.h>
+
+#include <limits.h>
+#include <stdint.h>
+
+#include "mai2io/mai2io.h"
+#include "mai2io/config.h"
+
+static uint8_t mai2_opbtn;
+static uint16_t mai2_player1_btn;
+static uint16_t mai2_player2_btn;
+static struct mai2_io_config mai2_io_cfg;
+static bool mai2_io_coin;
+
+uint16_t mai2_io_get_api_version(void)
+{
+    return 0x0100;
+}
+
+HRESULT mai2_io_init(void)
+{
+    mai2_io_config_load(&mai2_io_cfg, L".\\segatools.ini");
+
+    return S_OK;
+}
+
+HRESULT mai2_io_poll(void)
+{
+    mai2_opbtn = 0;
+    mai2_player1_btn = 0;
+    mai2_player2_btn = 0;
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_test) & 0x8000) {
+        mai2_opbtn |= MAI2_IO_OPBTN_TEST;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_service) & 0x8000) {
+        mai2_opbtn |= MAI2_IO_OPBTN_SERVICE;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_coin) & 0x8000) {
+        if (!mai2_io_coin) {
+            mai2_io_coin = true;
+            mai2_opbtn |= MAI2_IO_OPBTN_COIN;
+        }
+    } else {
+        mai2_io_coin = false;
+    }
+
+    //Player 1
+    if (GetAsyncKeyState(mai2_io_cfg.vk_1p_btn[0])) {
+        mai2_player1_btn |= MAI2_IO_GAMEBTN_1;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_1p_btn[1])) {
+        mai2_player1_btn |= MAI2_IO_GAMEBTN_2;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_1p_btn[2])) {
+        mai2_player1_btn |= MAI2_IO_GAMEBTN_3;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_1p_btn[3])) {
+        mai2_player1_btn |= MAI2_IO_GAMEBTN_4;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_1p_btn[4])) {
+        mai2_player1_btn |= MAI2_IO_GAMEBTN_5;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_1p_btn[5])) {
+        mai2_player1_btn |= MAI2_IO_GAMEBTN_6;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_1p_btn[6])) {
+        mai2_player1_btn |= MAI2_IO_GAMEBTN_7;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_1p_btn[7])) {
+        mai2_player1_btn |= MAI2_IO_GAMEBTN_8;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_1p_btn[8])) {
+        mai2_player1_btn |= MAI2_IO_GAMEBTN_SELECT;
+    }
+
+    //Player 2
+    if (GetAsyncKeyState(mai2_io_cfg.vk_2p_btn[0])) {
+        mai2_player2_btn |= MAI2_IO_GAMEBTN_1;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_2p_btn[1])) {
+        mai2_player2_btn |= MAI2_IO_GAMEBTN_2;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_2p_btn[2])) {
+        mai2_player2_btn |= MAI2_IO_GAMEBTN_3;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_2p_btn[3])) {
+        mai2_player2_btn |= MAI2_IO_GAMEBTN_4;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_2p_btn[4])) {
+        mai2_player2_btn |= MAI2_IO_GAMEBTN_5;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_2p_btn[5])) {
+        mai2_player2_btn |= MAI2_IO_GAMEBTN_6;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_2p_btn[6])) {
+        mai2_player2_btn |= MAI2_IO_GAMEBTN_7;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_2p_btn[7])) {
+        mai2_player2_btn |= MAI2_IO_GAMEBTN_8;
+    }
+
+    if (GetAsyncKeyState(mai2_io_cfg.vk_2p_btn[8])) {
+        mai2_player2_btn |= MAI2_IO_GAMEBTN_SELECT;
+    }
+
+    return S_OK;
+}
+
+void mai2_io_get_opbtns(uint8_t *opbtn)
+{
+    if (opbtn != NULL) {
+        *opbtn = mai2_opbtn;
+    }
+}
+
+void mai2_io_get_gamebtns(uint16_t *player1, uint16_t *player2)
+{
+    if (player1 != NULL) {
+        *player1 = mai2_player1_btn;
+    }
+
+    if (player2 != NULL ){
+        *player2 = mai2_player2_btn;
+    }
+}
\ No newline at end of file
diff --git a/mai2io/mai2io.h b/mai2io/mai2io.h
new file mode 100644
index 0000000..084228c
--- /dev/null
+++ b/mai2io/mai2io.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include <windows.h>
+
+#include <stdint.h>
+
+enum {
+    MAI2_IO_OPBTN_TEST = 0x01,
+    MAI2_IO_OPBTN_SERVICE = 0x02,
+    MAI2_IO_OPBTN_COIN = 0x04,
+};
+
+enum {
+    MAI2_IO_GAMEBTN_1 = 0x01,
+    MAI2_IO_GAMEBTN_2 = 0x02,
+    MAI2_IO_GAMEBTN_3 = 0x04,
+    MAI2_IO_GAMEBTN_4 = 0x08,
+    MAI2_IO_GAMEBTN_5 = 0x10,
+    MAI2_IO_GAMEBTN_6 = 0x20,
+    MAI2_IO_GAMEBTN_7 = 0x40,
+    MAI2_IO_GAMEBTN_8 = 0x80,
+    MAI2_IO_GAMEBTN_SELECT = 0x100,
+};
+
+/* Get the version of the Maimai IO API that this DLL supports. This
+   function should return a positive 16-bit integer, where the high byte is
+   the major version and the low byte is the minor version (as defined by the
+   Semantic Versioning standard).
+
+   The latest API version as of this writing is 0x0100. */
+
+uint16_t mai2_io_get_api_version(void);
+
+/* Initialize the IO DLL. This is the second function that will be called on
+   your DLL, after mai2_io_get_api_version.
+
+   All subsequent calls to this API may originate from arbitrary threads.
+
+   Minimum API version: 0x0100 */
+
+HRESULT mai2_io_init(void);
+
+/* Send any queued outputs (of which there are currently none, though this may
+   change in subsequent API versions) and retrieve any new inputs.
+
+   Minimum API version: 0x0100 */
+
+HRESULT mai2_io_poll(void);
+
+/* Get the state of the cabinet's operator buttons as of the last poll. See
+   MAI2_IO_OPBTN enum above: this contains bit mask definitions for button
+   states returned in *opbtn. All buttons are active-high.
+
+   Minimum API version: 0x0100 */
+
+void mai2_io_get_opbtns(uint8_t *opbtn);
+
+/* Get the state of the cabinet's gameplay buttons as of the last poll. See
+   MAI2_IO_GAMEBTN enum above for bit mask definitions. Inputs are split into
+   a left hand side set of inputs and a right hand side set of inputs: the bit
+   mappings are the same in both cases.
+
+   All buttons are active-high, even though some buttons' electrical signals
+   on a real cabinet are active-low.
+
+   Minimum API version: 0x0100 */
+
+void mai2_io_get_gamebtns(uint16_t *player1, uint16_t *player2);
diff --git a/mai2io/meson.build b/mai2io/meson.build
new file mode 100644
index 0000000..c448136
--- /dev/null
+++ b/mai2io/meson.build
@@ -0,0 +1,13 @@
+mai2io_lib = static_library(
+    'mai2io',
+    name_prefix : '',
+    include_directories : inc,
+    implicit_include_directories : false,
+    c_pch : '../precompiled.h',
+    sources : [
+        'mai2io.c',
+        'mai2io.h',
+        'config.c',
+        'config.h',
+    ],
+)
diff --git a/meson.build b/meson.build
index 851e57a..2032f0e 100644
--- a/meson.build
+++ b/meson.build
@@ -61,6 +61,7 @@ subdir('idzio')
 subdir('idacio')
 subdir('swdcio')
 subdir('mu3io')
+subdir('mai2io')
 subdir('cmio')
 subdir('mercuryio')
 subdir('cxbio')
@@ -74,6 +75,7 @@ subdir('swdchook')
 subdir('minihook')
 subdir('chusanhook')
 subdir('mu3hook')
+subdir('mai2hook')
 subdir('cmhook')
 subdir('mercuryhook')
 subdir('cxbhook')