RetroReversing · RetroGameDeveloper · Apr 25, 2026 · Apr 19, 2026 · Apr 19, 2026 · Apr 19, 2026
diff --git a/AGENTS.md b/AGENTS.md
@@ -1,2 +1,6 @@
 This is a Github Pages site all about reverse engineering and the source code for retro video games. The audience is technical.
 Always read and respect the contents of (Contributing.md)[./Contributing.md] when making changes.
+
+Do not do any git operations! Multiple changes will be made by different agents so git operations will effect their work.
+
+Load the following Skill: ./codex/skills/retroreversing-contributing/SKILL.md
diff --git a/_includes/followUs.html b/_includes/followUs.html
@@ -50,14 +50,14 @@
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+              class="followus-logo"
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@@ -68,7 +68,7 @@
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diff --git a/_includes/header.html b/_includes/header.html
@@ -3,8 +3,15 @@
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@@ -1,5 +1,5 @@
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diff --git a/_includes/sources-sidebar.html b/_includes/sources-sidebar.html
@@ -14,8 +14,10 @@ <h5 class="widget-title">Sources <span>({{ include.references.size }})</span></h
 {% endif %}
 {% if include.hideTOC != true %}
   <div class="post-directory widget widget-friends">
-    <h5 class="widget-title">Table of Contents</h5>
-    <dl></dl>
+    <h2 class="widget-title">Table of Contents</h2>
+    <nav class="post-directory-nav" aria-label="Table of contents">
+      <ul class="post-directory-list"></ul>
+    </nav>
   </div>
 {% endif %}
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diff --git a/_layouts/post.html b/_layouts/post.html
@@ -16,25 +16,27 @@
 
   {% include_cached video-carousel.html videocarousel=page.videocarousel %}
 
-  <section>
-    <div class="container post-container">
-      <div class="row">
-        <div class="col-lg-9", style="padding-left: 0px;">
-          <div class="post post-single">
-            {% include posts/post-header.html %}
-            {{ content | markdownify }}
+  <main id="main-content">
+    <section>
+      <div class="container post-container">
+        <div class="row">
+          <div class="col-lg-9" style="padding-left: 0px;">
+            <div class="post post-single">
+              {% include posts/post-header.html %}
+              {{ content | markdownify }}
+            </div>
+            {% include_cached posts/post-footer.html tags=page.tags %}
           </div>
-          {% include_cached posts/post-footer.html tags=page.tags %}
+          <aside class="col-lg-3">
+            <div class="sidebar">
+              {% include_cached sources-sidebar.html references=page.references hideTOC=page.hideTOC %}
+              {% include_cached recommended-sidebar.html recommend=page.recommend tags=page.tags recommend_title=page.recommendTitle current_url=page.url %}
+            </div>
+          </aside>
         </div>
-        <aside class="col-lg-3">
-          <div class="sidebar">
-            {% include_cached sources-sidebar.html references=page.references hideTOC=page.hideTOC %}
-            {% include_cached recommended-sidebar.html recommend=page.recommend tags=page.tags recommend_title=page.recommendTitle current_url=page.url %}
-          </div>
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diff --git a/categories/consoles/Intellivision.md b/categories/consoles/Intellivision.md
@@ -3,9 +3,6 @@ permalink: /intellivision
 layout: post
 category: intellivision
 title: Intellivision Reverse Engineering
-consoleimage: /public/consoles/Intellivision.png
-image_: /public/images/Intellivision.jpg
-twitterimage_: https://www.retroreversing.com/public/images/Intellivision.jpg
 excerpt: Awesome list of Intellivision Game Development and Reverse Engineering information
 breadcrumbs:
   - name: Home
@@ -32,6 +29,15 @@ Whether you're interested in understanding the hardware architecture of the cons
 
 So grab your Intellivision controller, and get ready to dive into the exciting world of Intellivision reverse engineering!
 
+## The Story of The Mattel Intellivision
+[Newsmakers Games](https://www.youtube.com/watch?v=RhlDH46BzJ0) has released a comprehensive retrospective detailing the hardware development and history of the Mattel Intellivision. The video covers the console's inception as a direct Atari competitor, its reliance on a General Instruments chipset, and the technical ambitions behind the ill-fated "Keyboard Component" intended to upgrade the system with a 6502 processor and 16K of RAM. 
+It also provides a great look into the system's pioneering controller design and its early push into complex simulation software like **Utopia**.
+
+<iframe width="560" height="315" src="https://www.youtube.com/embed/RhlDH46BzJ0" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
+
+---
 # Software Development for Intellivision
 Ever wondered what it was like to develop **Intellivision** games back on the day? The user **decle** on the **AtariAge** forum has put together an excellent pdf covering almost everything you would ever want to know about it:
 [Intellivision development, back in the day - Intellivision Programming - AtariAge Forums](https://forums.atariage.com/topic/259003-intellivision-development-back-in-the-day/)
+
+
diff --git a/categories/consoles/SG1000.md b/categories/consoles/SG1000.md
@@ -33,3 +33,9 @@ The most in-depth history of the Sega SG-1000 that I have found is a video creat
 
 <iframe width="560" height="315" src="https://www.youtube.com/embed/qBDx83UZ1nw?si=yfLTdn_1rA9ykb7d" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
 
+## Sega SG-1000 II System Review & Story
+[Nostalgia Nerd](https://www.youtube.com/watch?v=52Y33X6YGmQ) has a video exploring the hardware architecture and history of the Sega SG-1000 II console. The review details the system's underlying technical specifications, highlighting its use of a Zilog Z80 CPU running at 3.58 MHz alongside a Texas Instruments TMS9928A video processor and SN76489 sound chip. 
+Additionally, it examines the console's physical design, peripheral expansion capabilities, and software compatibility, demonstrating how its internal components heavily mirrored the **ColecoVision** and established the foundation for the Sega Master System.
+
+<iframe width="560" height="315" src="https://www.youtube.com/embed/52Y33X6YGmQ" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
+
diff --git a/categories/games/Games.md b/categories/games/Games.md
@@ -38,6 +38,45 @@ We have a specific post that aggregates all our posts on games with debug symbol
 
 {% include_cached link-to-other-post.html post="/symbols" %}
 
+---
+# NES Games
+
+## The Final Fantasy Battle Engine: A Dissection of Physical Attacks
+[Displaced Gamers](https://www.youtube.com/watch?v=O_CLnBCgJks) has an excellent video dissecting the underlying code, hidden math, and bugs governing physical attacks in the original NES Final Fantasy. The video explores how battle stats like accuracy, critical hit rates, and elemental weaknesses are processed in Assembly, revealing several programming oversights that heavily impact gameplay. It provides a fascinating look into early RPG mechanics and console game reverse engineering.
+
+<iframe width="560" height="315" src="https://www.youtube.com/embed/O_CLnBCgJks" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
+
+Core Architecture:
+* **System Scope:** Analysis of the physical attack mechanics within the Final Fantasy (NES/Famicom) battle engine.
+* **Code Footprint:** The execution logic for a single physical attack consists of 781 total bytes (excluding called subroutines), responsible for animation, damage calculation, and variable reporting.
+
+Base Stat Formulas:
+* **Attack Power:** Calculated as `(Character Strength / 2) + Weapon Power`. The decimal value is truncated.
+* **Accuracy:** Calculated as `Base Character Accuracy + Equipped Weapon Accuracy`.
+* **Hits per Attack:** Calculated as `(Accuracy / 32) + 1`. This value determines how many discrete damage rolls are executed per attack command.
+* **Evade:** Calculated as `Base 48 + Agility Modifier - Armor Weight Penalty`.
+* **Absorb (Defense):** Total numerical summation of all equipped armor mitigation values.
+
+The Black Belt / Master Class Exceptions:
+* **Armed:** Attack power receives a hardcoded `+1` modifier in addition to standard formulas.
+* **Unarmed:** Attack power and Critical Hit values bypass standard logic and are set to `Current Level * 2`. The hit count is calculated normally but then strictly doubled.
+* **Unarmored:** Absorb value logic is bypassed and set equal to the character's `Current Level`.
+
+RNG, Hit Validation, and Damage Calculation:
+* **Turn Order:** Agility does not govern turn priority. An array queue of players and enemies undergoes 16 RNG-based memory position swaps to randomize round sequence.
+* **Hit Chance Formula:** `168 (Flat Base Constant) + Attacker Accuracy - Defender Evade`. The initial calculation before the evasion deduction is hard-capped at 255.
+* **Battle RNG Validation:** A random value generated between `0` and `200`. A roll of `200` forces an automatic miss. If `Hit Chance >= Battle RNG`, the attack successfully lands.
+* **Base Damage Roll:** Generates a random value bounded by `[Attack Power]` and `[Attack Power * 2]`. 
+* **Calculated Damage:** `Damage Roll - Defender Absorb`. Floor value is strictly clamped at a minimum of `1` damage.
+* **Critical Hits:** If the same `Battle RNG <= Critical Hit Rate`, a critical strike occurs. A secondary raw damage roll is executed and added directly to the damage total, completely ignoring the defender's Absorb stat.
+
+Critical Engine Bugs & Logic Errors:
+* **Critical Hit Memory Fetch Error:** When querying the ROM table for a weapon's stored critical hit rate, the engine skips the instruction to load the stat. Instead, it writes the weapon's *index array ID* into RAM. Consequently, later-game weapons (higher index table values) yield artificially high crit rates regardless of intended design.
+* **Ailment Application on Misses:** Ailments run against `100 - Defender Magic Defense` and an RNG check. However, the logic utilizes a non-resetting running tally of connected hits to permit ailment rolls. If hit #1 connects, the flag turns non-zero; if hit #2 misses completely, the engine still executes the ailment roll against the player because the flag remains non-zero.
+* **Elemental Weakness Inversion:** When an enemy executes a physical attack carrying a status effect (e.g., Poison), the engine erroneously cross-references the player's resistances against the *enemy's innate elemental weaknesses* rather than the status type. (Example: Resisting Poison from a Scum enemy requires equipping Fire/Ice resistance, as the Scum is weak to Fire/Ice).
+* **Player Element Nullification:** Weapons with elemental attributes (e.g., Flame Sword) fail to trigger elemental damage bonuses because the combat routine queries the *player character's* element variable (which is nonexistent/null) instead of the *equipped weapon's* variable.
+* **Stun/Sleep Accuracy Omission:** When an attack target is under Stun or Sleep status, the attacker correctly receives a +25% attack power bonus. However, the logic jump bypasses the instruction to apply the attacker's accuracy stat entirely, locking the base hit chance at a fixed `84%` (168 base / 200).
+
 ---
 # All Posts related to Specific Games