diff --git a/CMakeLists.txt b/CMakeLists.txt
index f8ad10f..395b907 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -33,6 +33,7 @@ target_link_libraries(mtgcard PUBLIC
   pico_stdlib
   hardware_spi
   hardware_dma
+  hardware_clocks
   tinyusb_device
   tinyusb_board
   pico_unique_id
diff --git a/include/cardslot.h b/include/cardslot.h
index d355684..437787e 100644
--- a/include/cardslot.h
+++ b/include/cardslot.h
@@ -8,7 +8,7 @@
 class CardSlot
 {
 private:
-  static constexpr size_t FLASH_SIZE_MB = 2;
+  static constexpr size_t FLASH_SIZE_MB = 8;
 
 public:
   CardSlot(lib::Flash& flash, uint16_t card_index);
diff --git a/include/tusb_config.h b/include/tusb_config.h
index 7626957..e3c9b36 100644
--- a/include/tusb_config.h
+++ b/include/tusb_config.h
@@ -15,6 +15,7 @@ extern "C"
 #define CFG_TUD_VENDOR 1
 
 #define CFG_TUD_VENDOR_RX_BUFSIZE 0
+#define CFG_TUD_VENDOR_TX_BUFSIZE 256
 
 #ifdef __cplusplus
 }
diff --git a/src/flash.cpp b/src/flash.cpp
index 6fbdbf4..6e9b67c 100644
--- a/src/flash.cpp
+++ b/src/flash.cpp
@@ -44,8 +44,8 @@ Flash::Flash(uint8_t sck, uint8_t tx, uint8_t rx, uint8_t cs, int baudrate) :
 
 void Flash::read_page(uint16_t page_index)
 {
-  const uint8_t cmd[5] = { CMD_READ, static_cast<uint8_t>(page_index >> 8),
-                           static_cast<uint8_t>(page_index), 0, 0 };
+  const uint8_t cmd[4] = { CMD_READ, static_cast<uint8_t>(page_index >> 8),
+                           static_cast<uint8_t>(page_index), 0 };
 
   gpio_put(cs, false);
   spi_write_blocking(spi, cmd, 4);
@@ -92,6 +92,7 @@ void Flash::write_enable()
   gpio_put(cs, false);
   spi_write_blocking(spi, &cmd, 1);
   gpio_put(cs, true);
+  sleep_us(100);
 }
 
 void Flash::wait_done()
diff --git a/src/main.cpp b/src/main.cpp
index eee76a3..733ec79 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4,6 +4,7 @@
 #include "menu.h"
 #include "pixelstream.h"
 
+#include <hardware/clocks.h>
 #include <pico/binary_info.h>
 #include <pico/stdlib.h>
 #include <tusb.h>
@@ -17,21 +18,24 @@ bi_decl(bi_program_feature_group(0x1111, 0, "Display Pinout"));
 bi_decl(bi_ptr_int32(0x1111, 0, DISPLAY_SCK, 2));
 bi_decl(bi_ptr_int32(0x1111, 0, DISPLAY_TX, 3));
 bi_decl(bi_ptr_int32(0x1111, 0, DISPLAY_CS, 5));
-bi_decl(bi_ptr_int32(0x1111, 0, DISPLAY_DC, 6));
+bi_decl(bi_ptr_int32(0x1111, 0, DISPLAY_DC, 4));
 
 bi_decl(bi_program_feature_group(0x1111, 1, "Flash Pinout"));
-bi_decl(bi_ptr_int32(0x1111, 1, FLASH_SCK, 26));
-bi_decl(bi_ptr_int32(0x1111, 1, FLASH_TX, 27));
-bi_decl(bi_ptr_int32(0x1111, 1, FLASH_RX, 28));
-bi_decl(bi_ptr_int32(0x1111, 1, FLASH_CS, 29));
+bi_decl(bi_ptr_int32(0x1111, 1, FLASH_SCK, 10));
+bi_decl(bi_ptr_int32(0x1111, 1, FLASH_TX, 11));
+bi_decl(bi_ptr_int32(0x1111, 1, FLASH_RX, 12));
+bi_decl(bi_ptr_int32(0x1111, 1, FLASH_CS, 9));
+bi_decl(bi_ptr_int32(0x1111, 1, FLASH_IO_2, 13));
+bi_decl(bi_ptr_int32(0x1111, 1, FLASH_IO_3, 14));
 
 bi_decl(bi_program_feature_group(0x1111, 2, "Buttons"));
-bi_decl(bi_ptr_int32(0x1111, 2, BUTTON_LEFT, 8));
-bi_decl(bi_ptr_int32(0x1111, 2, BUTTON_MIDDLE, 0));
-bi_decl(bi_ptr_int32(0x1111, 2, BUTTON_RIGHT, 20));
+bi_decl(bi_ptr_int32(0x1111, 2, BUTTON_LEFT, 15));
+bi_decl(bi_ptr_int32(0x1111, 2, BUTTON_MIDDLE, 16));
+bi_decl(bi_ptr_int32(0x1111, 2, BUTTON_RIGHT, 17));
 
-Display display(DISPLAY_SCK, DISPLAY_TX, DISPLAY_CS, DISPLAY_DC, 120000000);
-Flash flash(FLASH_SCK, FLASH_TX, FLASH_RX, FLASH_CS, 70000000);
+Display display(DISPLAY_SCK, DISPLAY_TX, DISPLAY_CS, DISPLAY_DC,
+                100 * 1000 * 1000);
+Flash flash(FLASH_SCK, FLASH_TX, FLASH_RX, FLASH_CS, 25 * 1000 * 1000);
 
 enum class RX
 {
@@ -66,12 +70,25 @@ struct
   int32_t card_index = 0;
 } rx;
 
+volatile uint8_t debug_requested = false;
+
 constexpr int MS_BUTTON_TIMEOUT = 500;
 
 }
 
 int main()
 {
+  set_sys_clock_khz(200 * 1000, false);
+
+  gpio_set_function(FLASH_IO_2, GPIO_FUNC_SIO);
+  gpio_set_function(FLASH_IO_3, GPIO_FUNC_SIO);
+
+  gpio_set_dir(FLASH_IO_2, GPIO_OUT);
+  gpio_set_dir(FLASH_IO_3, GPIO_OUT);
+
+  gpio_put(FLASH_IO_2, 1);
+  gpio_put(FLASH_IO_3, 1);
+
   gpio_set_function(BUTTON_LEFT, GPIO_FUNC_SIO);
   gpio_set_function(BUTTON_MIDDLE, GPIO_FUNC_SIO);
   gpio_set_function(BUTTON_RIGHT, GPIO_FUNC_SIO);
@@ -130,6 +147,15 @@ int main()
     menus::get_current_menu()->onTick(dt);
 
     previous_time = current;
+
+    if (debug_requested > 0 && tud_vendor_write_available() > 0)
+    {
+      flash.read_page((debug_requested - 1) * CardSlot::TOTAL_PAGE_COUNT);
+      tud_vendor_write(flash.page(), Flash::Page::SIZE);
+      tud_vendor_write_flush();
+      sleep_ms(500);
+      debug_requested -= 1;
+    }
   }
 }
 
@@ -151,6 +177,14 @@ void tud_vendor_rx_cb(uint8_t itf, const uint8_t* buffer, uint16_t bufsize)
         return;
       }
 
+      // special command to debug flash
+      if (buffer[0] == 0x69)
+      {
+        debug_requested = CardSlot::MAX_CARDS;
+
+        return;
+      }
+
       rx.state = RX::GETTING_CMC;
 
       rx.card_index = CardSlot::get_unused(flash);