diff --git a/avr/usbload/Makefile b/avr/usbload/Makefile
index fe26c9d..25a11b5 100644
--- a/avr/usbload/Makefile
+++ b/avr/usbload/Makefile
@@ -2,8 +2,7 @@
 TTY     = /dev/tty.PL2303-00002126
 DEVICE  = atmega644
 F_CPU   = 20000000	# in Hz
-FUSE_L  = 0xf7
-FUSE_H  = 0xdd
+
 AVRDUDE = avrdude -c usbasp -p $(DEVICE)
 
 CFLAGS  = -Iusbdrv -I. -DDEBUG_LEVEL=0 
@@ -16,12 +15,8 @@ COMPILE = avr-gcc -Wall -Os -DF_CPU=$(F_CPU) $(CFLAGS) -mmcu=$(DEVICE)
 # Fuse values for particular devices
 ##############################################################################
 # http://www.engbedded.com/fusecalc/
-################################## ATMega644 ##################################
-# ATMega644 FUSE_L (Fuse low byte):
-# 0xf7 = 1 1 1 1  0 1 1 1
-# ATMega644 FUSE_H (Fuse high byte):
-# 0xdd = 1 1 0 1 1 1 0 0
-
+FUSE_L  = 0xf7
+FUSE_H  = 0xda
 
 
 # symbolic targets:
@@ -76,7 +71,7 @@ usbdrv:
 	cp -r ../../../usbdrv .
 
 main.elf: usbdrv $(OBJECTS)	# usbdrv dependency only needed because we copy it
-	$(COMPILE) -o main.elf $(OBJECTS) -Wl,-u,vfprintf -lprintf_flt
+	$(COMPILE) -o main.elf $(OBJECTS) -Wl,-u,vfprintf -lprintf_flt 
 
 main.hex: main.elf
 	rm -f main.hex main.eep.hex
diff --git a/avr/usbload/main.c b/avr/usbload/main.c
index 9fc5ea1..628e0e3 100644
--- a/avr/usbload/main.c
+++ b/avr/usbload/main.c
@@ -405,24 +405,41 @@ int main(void)
 
         while (req_state != REQ_STATUS_AVR){
             usbPoll();
-#if 0            
+#if 0          
             i = 20;
             while (--i) {               /* fake USB disconnect for > 250 ms */
-                _delay_ms(100);
+                _delay_ms(500);
+                printf("Wait to switch to avr mode %i\n", i);
             }
             printf("Send IRQ\n");
-            snes_irq_lo();
-            snes_irq_on();
-            _delay_ms(1);
+            //snes_irq_lo();
+            //snes_irq_on();
+            //_delay_ms(1);
 
-            //avr_bus_active();
-            //c = sram_bulk_read();
-            //snes_bus_active();
+            avr_bus_active();
             
-            snes_irq_off();
+            sram_bulk_read_start(0x003000);
+            c = sram_bulk_read();
+            i = 5;
+            while (--i) {               /* fake USB disconnect for > 250 ms */
+                _delay_ms(500);
+                printf("Wait to switch to snes mode %i\n", i);
+            }
             
-            //sram_bulk_read_start(0x003000);
-            //printf("Read 0x3000=%c\n",c);
+            if (req_bank_size == 0x8000){
+                snes_lorom();
+                printf("Set Snes lowrom \n");
+            } else {
+                snes_hirom();
+                printf("Set Snes hirom \n");
+            }
+            snes_wr_disable(); 
+            printf("Disable snes WR\n");
+
+            snes_bus_active();
+            printf("Activate Snes bus\n");
+            
+            printf("Read 0x3000=%c\n",c);
 #endif
         }
     }