diff --git a/avr/usbload/main.c b/avr/usbload/main.c
index 5a9d0a0..0c85d93 100644
--- a/avr/usbload/main.c
+++ b/avr/usbload/main.c
@@ -57,27 +57,16 @@ extern FILE uart_stdout;
 uint8_t debug_level = (DEBUG | DEBUG_USB | DEBUG_CRC | DEBUG_SHM );
 
 /*
-uint32_t req_addr = 0;
-uint32_t req_addr_end = 0;
-uint8_t req_bank;
-uint32_t req_bank_size;
-uint16_t req_bank_cnt;
-uint8_t req_percent;
-uint8_t req_percent_last;
-uint8_t req_state = REQ_STATUS_IDLE;
-uint8_t rx_remaining = 0;
-uint8_t tx_remaining = 0;
-uint16_t sync_errors = 0;
-uint8_t tx_buffer[32];
-uint8_t rx_buffer[8];
 */
-
-
+typedef struct system_t {
+    uint8_t bus_mode;
+    uint8_t rom_mode;
+    uint8_t req_bank;
+} system_t;
 
 
 usb_transaction_t usb_trans;
 
-
 usbMsgLen_t usbFunctionSetup(uchar data[8])
 {
 
diff --git a/avr/usbload/pwm.c b/avr/usbload/pwm.c
index 897731b..f1073d4 100644
--- a/avr/usbload/pwm.c
+++ b/avr/usbload/pwm.c
@@ -37,10 +37,10 @@ uint8_t pwm_sine_table[]  = {
 0x01,0x01,0x03,0x07,0x0b,0x11,0x17,0x1f,0x28,0x31,0x3b,0x46,0x52,0x5e,0x6a,0x76
 };
 
- volatile uint8_t pwm_setting;                    // Einstellungen für die einzelnen PWM-Kanäle
- volatile uint16_t pwm_overflow;                    // Einstellungen für die einzelnen PWM-Kanäle
- volatile uint8_t pwm_idx;                    // Einstellungen für die einzelnen PWM-Kanäle
- volatile uint16_t pwm_overflow_max;                    // Einstellungen für die einzelnen PWM-Kanäle
+volatile uint8_t pwm_setting;                   
+volatile uint16_t pwm_overflow;                    
+volatile uint8_t pwm_idx;                    
+volatile uint16_t pwm_overflow_max;                    
  
  ISR(TIMER2_COMPA_vect) {
     static uint8_t pwm_cnt=0;