diff --git a/eeprom.py b/eeprom.py
index 42fea59..4e60770 100755
--- a/eeprom.py
+++ b/eeprom.py
@@ -12,10 +12,10 @@ import atexit
 
 gpio_l = [2, 3, 4, 17, 27, 22, 10, 9, 11, 5, 6, 13, 19, 26]
 gpio_r = [14, 15, 18, 23, 24, 25, 8, 7, 12, 16, 20, 21]
+
 #
 # Defining which 6502 pin goes to which GPIO pin
 #
-
 A = [
      # 27, 22, 10, 9, 11, 5, 6, 13,
         13, 6, 5, 11, 9, 10, 22, 27,  # A0 - A7
@@ -278,7 +278,7 @@ def read_byte(address: int, verbose=True, debug=False) -> int:
     GPIO.output(WEb, 1)
     setup_io_pins(IN)
     # set the address valid
-    ad_bin = set_address(address, bits=15)
+    set_address(address, bits=15)
 
     # low in chip/output enable -> enable
     GPIO.output(CEb, 0)
@@ -426,6 +426,7 @@ def main():
     parser.add_argument("--write", "-w", dest="write", action="store_true", default=False, help="write binary file onto the EEPROM")
     parser.add_argument("--page", "-p", dest="use_page_write", action="store_true", default=False, help="use page write mode")
     parser.add_argument("--no-validate", dest="validate_write", action="store_false", default=True, help="dont validate write operations")
+    parser.add_argument("--full", dest="only_diff", action="store_false", default=True, help="write all bytes, not just ones that are mismatched")
     parser.add_argument("--compare", "-c", dest="compare", action="store_true", default=False, help="compare EEPROM content to binary file")
     parser.add_argument("--read", "-r", dest="read", action="store_true", default=False, help="read the contents of the EEPROM")
     parser.add_argument("--erase", "-e", dest="erase", action="store_true", default=False, help="erase the contents of the EEPROM")
@@ -453,7 +454,6 @@ def main():
         file = read_binary_file(args.file, from_ad=args.from_ad, to_ad=args.to_ad)
         if args.to_ad != args.from_ad + len(file) - 1:
             args.to_ad = args.from_ad + len(file) - 1
-
     else:
         file = None
 
@@ -463,7 +463,7 @@ def main():
     if args.erase:
         erase(from_ad=args.from_ad, to_ad=args.to_ad, delay=args.delay, debug=args.debug, verbose=True)
     if args.write:
-        write(file, from_ad=args.from_ad, delay=args.delay, debug=args.debug, verbose=True, check_written=args.validate_write, use_page_write=args.use_page_write)
+        write(file, from_ad=args.from_ad, delay=args.delay, debug=args.debug, verbose=True, check_written=args.validate_write, use_page_write=args.use_page_write, only_diff=args.only_diff)
     if args.read:
         read(from_ad=args.from_ad, to_ad=args.to_ad, delay=args.delay, debug=args.debug, verbose=True, ignore=args.ignore)
     if args.compare: