diff --git a/fw/SummerCart64.qsf b/fw/SummerCart64.qsf
index 13d94dd..3ed036d 100644
--- a/fw/SummerCart64.qsf
+++ b/fw/SummerCart64.qsf
@@ -19,7 +19,7 @@
 #
 # Quartus Prime
 # Version 20.1.1 Build 720 11/11/2020 SJ Lite Edition
-# Date created = 17:57:25  August 28, 2021
+# Date created = 21:34:30  August 28, 2021
 #
 # -------------------------------------------------------------------------- #
 #
@@ -196,7 +196,6 @@ set_global_assignment -name FAMILY "MAX 10"
 set_global_assignment -name DEVICE_FILTER_PACKAGE EQFP
 set_global_assignment -name DEVICE_FILTER_PIN_COUNT 144
 set_global_assignment -name DEVICE_FILTER_SPEED_GRADE 8
-set_global_assignment -name TOP_LEVEL_ENTITY SummerCart64
 set_global_assignment -name PROJECT_IP_REGENERATION_POLICY ALWAYS_REGENERATE_IP
 set_global_assignment -name VHDL_INPUT_VERSION VHDL_2008
 set_global_assignment -name VHDL_SHOW_LMF_MAPPING_MESSAGES OFF
diff --git a/fw/cpu/controller/process.c b/fw/cpu/controller/process.c
index 0a6e128..f9dc968 100644
--- a/fw/cpu/controller/process.c
+++ b/fw/cpu/controller/process.c
@@ -100,6 +100,28 @@ void process_usb (void) {
             } else if (cmd == 'C') {
                 cfg_update_config(args);
                 state = 3;
+            } else if (cmd == 'Q') {
+                if (USB->SCR & USB_SCR_TXE) {
+                    switch (current_byte) {
+                        case 0: USB->DR = cic_type >> 8; break;
+                        case 1: USB->DR = cic_type; break;
+                        case 2: USB->DR = ((tv_type & 0x3) << 4) | (save_type & 0x7); break;
+                        case 3: USB->DR = CFG->SCR; break;
+                        case 4: USB->DR = (CFG->SAVE_OFFSET >> 24); break;
+                        case 5: USB->DR = (CFG->SAVE_OFFSET >> 16); break;
+                        case 6: USB->DR = (CFG->SAVE_OFFSET >> 8); break;
+                        case 7: USB->DR = (CFG->SAVE_OFFSET >> 0); break;
+                        case 8: USB->DR = (CFG->DD_OFFSET >> 24); break;
+                        case 9: USB->DR = (CFG->DD_OFFSET >> 16); break;
+                        case 10: USB->DR = (CFG->DD_OFFSET >> 8); break;
+                        case 11: USB->DR = (CFG->DD_OFFSET >> 0); break;
+                    }
+                    current_byte += 1;
+                    if (current_byte == 12) {
+                        state = 3;
+                        current_byte = 0;
+                    }
+                }
             } else {
                 state = 3;
                 is_error = 1;
diff --git a/sw/dumpy/.gitignore b/sw/dumpy/.gitignore
new file mode 100644
index 0000000..609531a
--- /dev/null
+++ b/sw/dumpy/.gitignore
@@ -0,0 +1,7 @@
+*.dat
+*.srm
+*.eep
+*.fla
+*.n64
+*.z64
+*.v64
diff --git a/sw/dumpy/dum.py b/sw/dumpy/dum.py
new file mode 100644
index 0000000..ab14921
--- /dev/null
+++ b/sw/dumpy/dum.py
@@ -0,0 +1,102 @@
+import os
+import serial
+import sys
+
+
+
+class SC64:
+    __SDRAM_SIZE = 64 * 1024 * 1024
+
+    def __init__(self, port):
+        self.__serial = serial.Serial(port)
+        self.__query_config()
+
+
+    def __query_config(self):
+        self.__serial.write(b'CMDQ')
+        self.__serial.write(bytes(8))
+        config_raw = self.__serial.read(12)
+        if (self.__serial.read(4).decode() != 'CMPQ'):
+            raise Exception('Bad query response')
+        self.__save_type = config_raw[2] & 0x07
+        self.__save_offset = int.from_bytes(config_raw[4:8], byteorder='big')
+
+
+    def __save_length(self):
+        return {
+            0: 0,
+            1: 512,
+            2: 2048,
+            3: (32 * 1024),
+            4: (128 * 1024),
+            5: (3 * 32 * 1024),
+            6: (128 * 1024),
+            7: 0
+        }[self.__save_type]
+
+
+    def dump_save(self, file):
+        length = self.__save_length()
+        if (length == 0):
+            raise Exception('No save type is selected')
+        self.__serial.write(b'CMDR')
+        self.__serial.write(self.__save_offset.to_bytes(4, byteorder='big'))
+        self.__serial.write(length.to_bytes(4, byteorder='big'))
+        save = self.__serial.read(length)
+        response = self.__serial.read(4)
+        if (response.decode() == 'CMPR'):
+            with open(file, 'wb') as f:
+                f.write(save)
+        else:
+            raise Exception('There was a problem while dumping save data')
+
+
+    def redump_save(self, file):
+        length = self.__save_length()
+        if (not length):
+            raise Exception('No save type is selected')
+        if (os.path.getsize(file) != length):
+            raise Exception('Wrong save file size')
+        with open(file, 'rb') as f:
+            self.__serial.write(b'CMDW')
+            self.__serial.write(self.__save_offset.to_bytes(4, byteorder='big'))
+            self.__serial.write(length.to_bytes(4, byteorder='big'))
+            self.__serial.write(f.read())
+            response = self.__serial.read(4)
+            if (response.decode() != 'CMPW'):
+                raise Exception('There was a problem while redumping save data')
+
+
+    def dump_all(self, file):
+        self.__serial.write(b'CMDR')
+        self.__serial.write((0).to_bytes(4, byteorder='big'))
+        self.__serial.write((self.__SDRAM_SIZE).to_bytes(4, byteorder='big'))
+        save = self.__serial.read(self.__SDRAM_SIZE)
+        response = self.__serial.read(4)
+        if (response.decode() == 'CMPR'):
+            with open(file, 'wb') as f:
+                f.write(save)
+        else:
+            raise Exception('There was a problem while dumping all data')
+
+
+
+mode = 'r'
+file = 'save.dat'
+port = 'COM5'
+
+if (len(sys.argv) >= 2):
+    mode = sys.argv[1]
+if (len(sys.argv) >= 3):
+    file = sys.argv[2]
+if (len(sys.argv) >= 4):
+    port = sys.argv[3]
+
+sc64 = SC64(port)
+
+if (mode == 'r'):
+    sc64.dump_save(file)
+elif (mode == 'w'):
+    sc64.redump_save(file)
+elif (mode == 'a'):
+    sc64.dump_all(file)