diff --git a/board/sg-reader.c b/board/sg-reader.c
index a39107e..792894b 100644
--- a/board/sg-reader.c
+++ b/board/sg-reader.c
@@ -1,8 +1,11 @@
 #include <windows.h>
 
 #include <assert.h>
+#include <stdbool.h>
 #include <stdint.h>
 
+#include "aimeio/aimeio.h"
+
 #include "board/sg-led.h"
 #include "board/sg-nfc.h"
 #include "board/sg-reader.h"
@@ -18,19 +21,41 @@ static HRESULT sg_reader_handle_irp_locked(
         struct sg_reader *reader,
         struct irp *irp);
 
-void sg_reader_init(
-        struct sg_reader *reader,
-        unsigned int port_no,
-        const struct sg_nfc_ops *nfc_ops,
-        const struct sg_led_ops *led_ops,
-        void *ops_ctx)
-{
-    assert(reader != NULL);
-    assert(nfc_ops != NULL);
-    assert(led_ops != NULL);
+static HRESULT sg_reader_mifare_poll(void *ctx, uint32_t *uid);
 
-    sg_nfc_init(&reader->nfc, 0x00, nfc_ops, ops_ctx);
-    sg_led_init(&reader->led, 0x08, led_ops, ops_ctx);
+static HRESULT sg_reader_mifare_read_luid(
+        void *ctx,
+        uint32_t uid,
+        uint8_t *luid,
+        size_t luid_size);
+
+static void sg_reader_led_set_color(void *ctx, uint8_t r, uint8_t g, uint8_t b);
+
+static const struct sg_nfc_ops sg_reader_nfc_ops = {
+    .mifare_poll        = sg_reader_mifare_poll,
+    .mifare_read_luid   = sg_reader_mifare_read_luid,
+};
+
+static const struct sg_led_ops sg_reader_led_ops = {
+    .set_color          = sg_reader_led_set_color,
+};
+
+HRESULT sg_reader_init(
+        struct sg_reader *reader,
+        unsigned int port_no)
+{
+    HRESULT hr;
+
+    assert(reader != NULL);
+
+    hr = aime_io_init();
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    sg_nfc_init(&reader->nfc, 0x00, &sg_reader_nfc_ops, reader);
+    sg_led_init(&reader->led, 0x08, &sg_reader_led_ops, reader);
 
     InitializeCriticalSection(&reader->lock);
 
@@ -39,6 +64,16 @@ void sg_reader_init(
     reader->uart.written.nbytes = sizeof(reader->written_bytes);
     reader->uart.readable.bytes = reader->readable_bytes;
     reader->uart.readable.nbytes = sizeof(reader->readable_bytes);
+
+    return S_OK;
+}
+
+bool sg_reader_match_irp(const struct sg_reader *reader, const struct irp *irp)
+{
+    assert(reader != NULL);
+    assert(irp != NULL);
+
+    return uart_match_irp(&reader->uart, irp);
 }
 
 HRESULT sg_reader_handle_irp(struct sg_reader *reader, struct irp *irp)
@@ -48,10 +83,6 @@ HRESULT sg_reader_handle_irp(struct sg_reader *reader, struct irp *irp)
     assert(reader != NULL);
     assert(irp != NULL);
 
-    if (!uart_match_irp(&reader->uart, irp)) {
-        return iohook_invoke_next(irp);
-    }
-
     EnterCriticalSection(&reader->lock);
     hr = sg_reader_handle_irp_locked(reader, irp);
     LeaveCriticalSection(&reader->lock);
@@ -101,3 +132,22 @@ static HRESULT sg_reader_handle_irp_locked(
 
     return hr;
 }
+
+static HRESULT sg_reader_mifare_poll(void *ctx, uint32_t *uid)
+{
+    return aime_io_mifare_poll(0, uid);
+}
+
+static HRESULT sg_reader_mifare_read_luid(
+        void *ctx,
+        uint32_t uid,
+        uint8_t *luid,
+        size_t luid_size)
+{
+    return aime_io_mifare_read_luid(0, uid, luid, luid_size);
+}
+
+static void sg_reader_led_set_color(void *ctx, uint8_t r, uint8_t g, uint8_t b)
+{
+    aime_io_led_set_color(0, r, g, b);
+}
diff --git a/board/sg-reader.h b/board/sg-reader.h
index d14769e..17236af 100644
--- a/board/sg-reader.h
+++ b/board/sg-reader.h
@@ -2,6 +2,7 @@
 
 #include <windows.h>
 
+#include <stdbool.h>
 #include <stdint.h>
 
 #include "board/sg-led.h"
@@ -18,11 +19,10 @@ struct sg_reader {
     struct sg_led led;
 };
 
-void sg_reader_init(
+HRESULT sg_reader_init(
         struct sg_reader *reader,
-        unsigned int port_no,
-        const struct sg_nfc_ops *nfc_ops,
-        const struct sg_led_ops *led_ops,
-        void *ops_ctx);
+        unsigned int port_no);
+
+bool sg_reader_match_irp(const struct sg_reader *reader, const struct irp *irp);
 
 HRESULT sg_reader_handle_irp(struct sg_reader *reader, struct irp *irp);
diff --git a/cardhook/_com12.c b/cardhook/_com12.c
index d4e8c6d..d2d277a 100644
--- a/cardhook/_com12.c
+++ b/cardhook/_com12.c
@@ -1,12 +1,7 @@
 #include <windows.h>
 
 #include <assert.h>
-#include <stdint.h>
 
-#include "aimeio/aimeio.h"
-
-#include "board/sg-led.h"
-#include "board/sg-nfc.h"
 #include "board/sg-reader.h"
 
 #include "cardhook/_com12.h"
@@ -14,22 +9,6 @@
 #include "hook/iohook.h"
 
 static HRESULT com12_handle_irp(struct irp *irp);
-static HRESULT com12_mifare_poll(void *ctx, uint32_t *uid);
-static HRESULT com12_mifare_read_luid(
-        void *ctx,
-        uint32_t uid,
-        uint8_t *luid,
-        size_t nbytes);
-static void com12_led_set_color(void *ctx, uint8_t r, uint8_t g, uint8_t b);
-
-static const struct sg_nfc_ops com12_nfc_ops = {
-    .mifare_poll        = com12_mifare_poll,
-    .mifare_read_luid   = com12_mifare_read_luid,
-};
-
-static const struct sg_led_ops com12_led_ops = {
-    .set_color          = com12_led_set_color,
-};
 
 static struct sg_reader com12_reader;
 
@@ -37,14 +16,12 @@ HRESULT com12_hook_init(void)
 {
     HRESULT hr;
 
-    hr = aime_io_init();
+    hr = sg_reader_init(&com12_reader, 12);
 
     if (FAILED(hr)) {
         return hr;
     }
 
-    sg_reader_init(&com12_reader, 12, &com12_nfc_ops, &com12_led_ops, NULL);
-
     return iohook_push_handler(com12_handle_irp);
 }
 
@@ -52,24 +29,9 @@ static HRESULT com12_handle_irp(struct irp *irp)
 {
     assert(irp != NULL);
 
+    if (!sg_reader_match_irp(&com12_reader, irp)) {
+        return iohook_invoke_next(irp);
+    }
+
     return sg_reader_handle_irp(&com12_reader, irp);
 }
-
-static HRESULT com12_mifare_poll(void *ctx, uint32_t *uid)
-{
-    return aime_io_mifare_poll(0, uid);
-}
-
-static HRESULT com12_mifare_read_luid(
-        void *ctx,
-        uint32_t uid,
-        uint8_t *luid,
-        size_t luid_size)
-{
-    return aime_io_mifare_read_luid(0, uid, luid, luid_size);
-}
-
-static void com12_led_set_color(void *ctx, uint8_t r, uint8_t g, uint8_t b)
-{
-    aime_io_led_set_color(0, r, g, b);
-}
diff --git a/idzhook/_com10.c b/idzhook/_com10.c
index 02055f9..e00ed10 100644
--- a/idzhook/_com10.c
+++ b/idzhook/_com10.c
@@ -3,33 +3,13 @@
 #include <assert.h>
 #include <stdint.h>
 
-#include "aimeio/aimeio.h"
-
-#include "board/sg-led.h"
-#include "board/sg-nfc.h"
 #include "board/sg-reader.h"
 
-#include "divahook/_com10.h"
-
 #include "hook/iohook.h"
 
+#include "idzhook/_com10.h"
+
 static HRESULT com10_handle_irp(struct irp *irp);
-static HRESULT com10_mifare_poll(void *ctx, uint32_t *uid);
-static HRESULT com10_mifare_read_luid(
-        void *ctx,
-        uint32_t uid,
-        uint8_t *luid,
-        size_t nbytes);
-static void com10_led_set_color(void *ctx, uint8_t r, uint8_t g, uint8_t b);
-
-static const struct sg_nfc_ops com10_nfc_ops = {
-    .mifare_poll        = com10_mifare_poll,
-    .mifare_read_luid   = com10_mifare_read_luid,
-};
-
-static const struct sg_led_ops com10_led_ops = {
-    .set_color          = com10_led_set_color,
-};
 
 static struct sg_reader com10_reader;
 
@@ -37,14 +17,12 @@ HRESULT com10_hook_init(void)
 {
     HRESULT hr;
 
-    hr = aime_io_init();
+    hr = sg_reader_init(&com10_reader, 10);
 
     if (FAILED(hr)) {
         return hr;
     }
 
-    sg_reader_init(&com10_reader, 10, &com10_nfc_ops, &com10_led_ops, NULL);
-
     return iohook_push_handler(com10_handle_irp);
 }
 
@@ -52,24 +30,9 @@ static HRESULT com10_handle_irp(struct irp *irp)
 {
     assert(irp != NULL);
 
+    if (!sg_reader_match_irp(&com10_reader, irp)) {
+        return iohook_invoke_next(irp);
+    }
+
     return sg_reader_handle_irp(&com10_reader, irp);
 }
-
-static HRESULT com10_mifare_poll(void *ctx, uint32_t *uid)
-{
-    return aime_io_mifare_poll(0, uid);
-}
-
-static HRESULT com10_mifare_read_luid(
-        void *ctx,
-        uint32_t uid,
-        uint8_t *luid,
-        size_t luid_size)
-{
-    return aime_io_mifare_read_luid(0, uid, luid, luid_size);
-}
-
-static void com10_led_set_color(void *ctx, uint8_t r, uint8_t g, uint8_t b)
-{
-    aime_io_led_set_color(0, r, g, b);
-}