readme

Author: U-UC\harvey1

README.md

@@ -12,7 +12,7 @@ There are only two invocations of as4:
 * ./as4 -b BASE_ADDRESS INPUT OUTPUT
 * ./as4 INPUT OUTPUT
 
-Where INPUT is your assembly language text file, OUTPUT is your binary file output, and BASE_ADDRESS is the numerical value (in hex, octal, decimal or binary) of the base address for compilation where all memory addresses are calculated relative to.
+Where INPUT is your assembly language text file, OUTPUT is your binary file output, and BASE_ADDRESS is the numerical value (in hex, octal, decimal or binary) of the base address for compilation where all memory addresses are calculated relative to. BASE_ADDRESS is assumed to be 0 if not specified.
 
 ### 8 instructions ###
 The Nibble Knowledge CPU has 8 instructions which are split into two different types: