Refactor E and S

WEEK06/WEEK06-03.md

@@ -1,13 +1,13 @@
-# Embedded Systems Reverse Engineering
+# Embedded Systems Reverse Engineering
 [Repository](https://github.com/mytechnotalent/Embedded-Hacking)
 
 ## Week 6
 Static Variables in Embedded Systems: Debugging and Hacking Static Variables w/ GPIO Input Basics
 
-### Exercise 3: Make the Overflow Happen Faster
+### Non-Credit Practice Exercise 3: Make the Overflow Happen Faster
 
 #### Objective
-Patch the `adds r3, #0x1` instruction — which increments `static_fav_num` by 1 each loop iteration — to `adds r3, #0xa` so the variable increments by 10 instead. Use GDB to locate the instruction, calculate the hex editor file offset, patch the binary, and verify on hardware that the `uint8_t` overflow occurs roughly 10 times sooner.
+Patch the `adds r3, #0x1` instruction — which increments `static_fav_num` by 1 each loop iteration — to `adds r3, #0xa` so the variable increments by 10 instead. Use GDB to locate the instruction, calculate the hex editor file offset, patch the binary, and verify on hardware that the `uint8_t` overflow occurs roughly 10 times sooner.
 
 #### Prerequisites
 - Completed Week 6 tutorial (GDB and hex editor sections)
@@ -61,7 +61,7 @@ Look for this sequence:
 ```
 0x10000278:    ldrb r3, [r4, #0]   ; Load static_fav_num from RAM
 0x1000027a:    movs r2, #16        ; LED GPIO pin number
-0x1000027c:    adds r3, #1         ; Increment by 1 ← THIS IS OUR TARGET
+0x1000027c:    adds r3, #1         ; Increment by 1 ? THIS IS OUR TARGET
 0x1000027e:    strb r3, [r4, #0]   ; Store back to RAM
 ```
 
@@ -116,10 +116,10 @@ For the `adds r3, #0x1` instruction at its address, calculate the offset.
 2. Press **Ctrl+G** (Go to offset) and enter the calculated offset
 3. You should see the byte `01` followed by `33`
 4. Change `01` to `0A` (10 in decimal)
-5. Verify: the bytes should now read `0A 33` — encoding `adds r3, #0xa`
-6. Click **File** → **Save As** → `0x0014_static-variables-h.bin` (in the same `build` directory)
+5. Verify: the bytes should now read `0A 33` — encoding `adds r3, #0xa`
+6. Click **File** ? **Save As** ? `0x0014_static-variables-h.bin` (in the same `build` directory)
 
-> 🔍 **Why this works:** In Thumb `adds rD, #imm8` encoding, the immediate value is stored in the first byte. The `#imm8` field accepts values 0-255, so changing 1 to 10 is safe.
+> ?? **Why this works:** In Thumb `adds rD, #imm8` encoding, the immediate value is stored in the first byte. The `#imm8` field accepts values 0-255, so changing 1 to 10 is safe.
 
 ##### Step 7: Convert to UF2 and Flash
 
@@ -139,7 +139,7 @@ python ..\uf2conv.py build\0x0014_static-variables-h.bin --base 0x10000000 --fam
 regular_fav_num: 42
 static_fav_num: 42
 regular_fav_num: 42
-static_fav_num: 52     ← Jumped by 10!
+static_fav_num: 52     ? Jumped by 10!
 regular_fav_num: 42
 static_fav_num: 62
 ...
@@ -148,10 +148,10 @@ static_fav_num: 242
 regular_fav_num: 42
 static_fav_num: 252
 regular_fav_num: 42
-static_fav_num: 6      ← Overflow! 252 + 10 = 262, but uint8_t wraps: 262 - 256 = 6
+static_fav_num: 6      ? Overflow! 252 + 10 = 262, but uint8_t wraps: 262 - 256 = 6
 ```
 
-Notice the overflow now happens much sooner, and the wrap value is no longer 0 — it's 6 because `252 + 10 = 262` which wraps to `262 mod 256 = 6`.
+Notice the overflow now happens much sooner, and the wrap value is no longer 0 — it's 6 because `252 + 10 = 262` which wraps to `262 mod 256 = 6`.
 
 #### Expected Output