(docs) readme - Change keypad reference to a side-by-side layout

notes/2023-08-21--dev-notes.md

@@ -31,7 +31,7 @@
     - cpu: accept an optional debugging array, print line # and statement
 - readme:
     - [x] readme: rename (or split up?) mem map / peripherals section
-    - [ ] ? readme: put 2 keypad charts side by side (they would fit on my phone)
+    - [x] ? readme: put 2 keypad charts side by side (they would fit on my phone)
 - [/] see paper notes on mem map
 
 

readme.md

@@ -85,21 +85,15 @@ With single stepping + verbose debugging output:
 The value of the latest keypress on a hex keypad is stored at `$20`.
 (The keypad can also be relocated by changing the value  of the pointer-to-keypad at `$22`.)
 
-The keypad uses the same layout as the COSMAC VIP (and CHIP-8):
+The keypad uses the same layout as the COSMAC VIP (and CHIP-8). The CPU simulator maps those keys onto a Qwerty set.
 
 ```
-1 2 3 C
-4 5 6 D
-7 8 9 E
-A 0 B F
-```
-The CPU simulator maps the following Qwerty keys onto those values:
+1 2 3 C    1 2 3 4
+4 5 6 D    Q W E R
+7 8 9 E    A S D F
+A 0 B F    Z X C V
 
-```
-1 2 3 4
-Q W E R
-A S D F
-Z X C V
+  VIP     simulator
 ```
 
 ## Assembly language