diff --git a/inc/mcu/at32/f4.h b/inc/mcu/at32/f4.h
index 8be940c..23de004 100644
--- a/inc/mcu/at32/f4.h
+++ b/inc/mcu/at32/f4.h
@@ -90,6 +90,7 @@ extern unsigned int sram_kb;
 enum {
     F4SM_v4 = 0,
     F4SM_v4_slim,
+    F4SM_v4_1,
 };
 
 /* Core floppy pin assignments vary between F4 submodels (except INDEX, RDATA, 
diff --git a/src/mcu/at32f4/board.c b/src/mcu/at32f4/board.c
index 49ed9ca..fee0667 100644
--- a/src/mcu/at32f4/board.c
+++ b/src/mcu/at32f4/board.c
@@ -70,6 +70,11 @@ const static struct board_config _board_config[] = {
         .hse_byp   = TRUE,
         .user_pins = _user_pins_v4_slim,
         .msel_pins = _msel_pins_v4_slim },
+    [F4SM_v4_1] = {
+        .hse_mhz   = 8,
+        .flippy    = TRUE,
+        .user_pins = _user_pins_v4,
+        .msel_pins = _msel_pins_v4 },
 };
 
 const struct core_floppy_pins *core_floppy_pins;
@@ -143,6 +148,7 @@ static void mcu_board_init(void)
 {
     switch (gw_info.hw_submodel) {
     case F4SM_v4:
+    case F4SM_v4_1:
         gpio_pull_up_pins(gpioa, 0x0101); /* PA0,8 */
         gpio_pull_up_pins(gpiob, 0x1803); /* PB0-1,11-12 */
         gpio_pull_up_pins(gpioc, 0xffff); /* PC0-15 */
diff --git a/src/mcu/at32f4/floppy.c b/src/mcu/at32f4/floppy.c
index 24de058..3290b17 100644
--- a/src/mcu/at32f4/floppy.c
+++ b/src/mcu/at32f4/floppy.c
@@ -152,6 +152,7 @@ static uint8_t mcu_get_floppy_pin(unsigned int pin, uint8_t *p_level)
 {
     switch (gw_info.hw_submodel) {
     case F4SM_v4:
+    case F4SM_v4_1:
         if (pin == 34) {
             *p_level = gpio_read_pin(gpiob, 15);
             return ACK_OKAY;
diff --git a/src/mcu/at32f4/testmode.c b/src/mcu/at32f4/testmode.c
index 3341cff..251051f 100644
--- a/src/mcu/at32f4/testmode.c
+++ b/src/mcu/at32f4/testmode.c
@@ -63,6 +63,7 @@ uint8_t testmode_init(void)
 {
     switch (gw_info.hw_submodel) {
     case F4SM_v4:
+    case F4SM_v4_1:
         return ACK_OKAY;
     }
     return ACK_BAD_COMMAND;