(docs) readme - Change 'register and flags' section to improve style and clarity

readme.md

@@ -55,15 +55,22 @@ Usage: ./cardiograph.js [-i <file>]
 
 ### Registers and Flags
 
-- `A` - accumulator
-- `IP` - instruction pointer (aka program counter)
-- `FLAGS` - flags: **O**verflow, **N**egative, **Z**ero, **C**arry
-    - in machine language, each flag is given a number:
-        - O = 3  
-          N = 2  
-          Z = 1  
-          C = 0
-    - (bitwise, `0000 = ONZC`)
+There are three registers:
+
+1. **A**, an 8-bit accumulator
+2. **IP**, an 8-bit instruction pointer (aka program counter)
+3. **flags**, a 4-bit flag register
+
+The four flags are **O**verflow, **N**egative, **Z**ero, and **C**arry.
+
+(Overflow is the high bit and carry is the low bit.)
+
+In decimal:
+
+| O | N | Z | C |
+|---|---|---|---|
+| 3 | 2 | 1 | 0 |
+
 
 
 ### Instruction set