diff --git a/avr/usbload/sram.c b/avr/usbload/sram.c
index 24fcc0c..bec497f 100644
--- a/avr/usbload/sram.c
+++ b/avr/usbload/sram.c
@@ -265,15 +265,66 @@ void sram_write(uint32_t addr, uint8_t data)
 }
 
 
-
-void sram_clear(uint32_t addr, uint32_t len)
+void sram_bulk_copy(uint32_t addr, uint8_t * src, uint32_t len)
 {
 
     uint32_t i;
+    uint8_t *ptr = src;
+#ifdef DEBUG_SRAM
+    printf("sram_copy: addr=0x%08lx src=0x%p len=%li\n\r", addr,src,len);
+#endif
+    sram_bulk_write_start(addr);
+    for (i = addr; i < (addr + len); i++){
+        sram_bulk_write(*ptr++);
+        sram_bulk_write_next();
+    }
+    sram_bulk_write_end();
+}
+
+void sram_bulk_read_buffer(uint32_t addr, uint8_t * dst, uint32_t len)
+{
+
+    uint32_t i;
+    uint8_t *ptr = dst;
+#ifdef DEBUG_SRAM
+    printf("sram_bulk_read_buffer: addr=0x%08lx dst=0x%p len=%li\n\r", addr,dst,len);
+#endif
+    sram_bulk_read_start(addr);
+    for (i = addr; i < (addr + len); i++) {
+        *ptr = sram_bulk_read();
+        sram_bulk_read_next();
+        ptr++;
+    }
+    sram_bulk_read_end();
+}
+
+void sram_bulk_clear(uint32_t addr, uint32_t len){
+    uint32_t i;
+#ifdef DEBUG_SRAM
+    printf("sram_bulk_clear: addr=0x%08lx len=%li\n\r", addr,len);
+#endif
+    sram_bulk_write_start(addr);
     for (i = addr; i < (addr + len); i++) {
         if (0 == i % 0xfff)
 #ifdef DEBUG_SRAM
-            printf("sram_clear: addr=0x%08lx\n\r", i);
+        printf("sram_bulk_clear: addr=0x%08lx\n\r", i);
+#endif
+        sram_bulk_write(0xff);
+        sram_bulk_write_next();
+    }
+    sram_bulk_write_end();
+}
+
+void sram_clear(uint32_t addr, uint32_t len)
+{
+    uint32_t i;
+#ifdef DEBUG_SRAM
+    printf("sram_clear: addr=0x%08lx len=%li\n\r", addr,len);
+#endif
+    for (i = addr; i < (addr + len); i++) {
+        if (0 == i % 0xfff)
+#ifdef DEBUG_SRAM
+    printf("sram_clear: addr=0x%08lx\n\r", i);
 #endif
         sram_write(i, 0x00);
     }
@@ -285,7 +336,7 @@ void sram_copy(uint32_t addr, uint8_t * src, uint32_t len)
     uint32_t i;
     uint8_t *ptr = src;
 #ifdef DEBUG_SRAM
-            printf("sram_copy: addr=0x%08lx src=0x%p len=%li\n\r", addr,src,len);
+    printf("sram_copy: addr=0x%08lx src=0x%p len=%li\n\r", addr,src,len);
 #endif
     for (i = addr; i < (addr + len); i++)
         sram_write(i, *ptr++);
@@ -297,18 +348,19 @@ void sram_read_buffer(uint32_t addr, uint8_t * dst, uint32_t len)
     uint32_t i;
     uint8_t *ptr = dst;
 #ifdef DEBUG_SRAM
-            printf("sram_read_buffer: addr=0x%08lx dst=0x%p len=%li\n\r", addr,dst,len);
+    printf("sram_read_buffer: addr=0x%08lx dst=0x%p len=%li\n\r", addr,dst,len);
 #endif
     for (i = addr; i < (addr + len); i++) {
         *ptr = sram_read(i);
         ptr++;
     }
 }
+
 uint8_t sram_check(uint8_t * buffer, uint32_t len)
 {
     uint16_t cnt;
 #ifdef DEBUG_SRAM
-            printf("sram_check: len=%li\n\r",len);
+    printf("sram_check: len=%li\n\r",len);
 #endif
     for (cnt = 0; cnt < len; cnt++)
         if (buffer[cnt])
diff --git a/avr/usbload/sram.h b/avr/usbload/sram.h
index 45bf445..47d53dd 100644
--- a/avr/usbload/sram.h
+++ b/avr/usbload/sram.h
@@ -142,10 +142,12 @@
 void system_init(void);
 void sreg_set(uint32_t addr);
 
+
 uint8_t sram_read(uint32_t addr);
 void sram_write(uint32_t addr, uint8_t data);
 void sram_clear(uint32_t addr, uint32_t len);
 void sram_copy(uint32_t addr,uint8_t *src, uint32_t len);
+void sram_read_buffer(uint32_t addr,uint8_t *dst, uint32_t len);
 
 void sram_bulk_read_start(uint32_t addr);
 inline void sram_bulk_read_next(void);
@@ -157,7 +159,6 @@ inline void sram_bulk_read_next(void);
 inline void sram_bulk_write_end(void);
 void sram_bulk_write(uint8_t data);
 
-
-
-void sram_read_buffer(uint32_t addr,uint8_t *dst, uint32_t len);
-uint8_t sram_check(uint8_t *buffer, uint32_t len);
+void sram_bulk_copy(uint32_t addr, uint8_t * src, uint32_t len);
+void sram_bulk_read_buffer(uint32_t addr, uint8_t * dst, uint32_t len);
+void sram_bulk_clear(uint32_t addr, uint32_t len);