Add 4 Mega ST computer detail pages (Low, High, Heirloom, Mega ST 2)

retro/mega-st-heirloom/index.njk

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+---
+title: "The Heirloom Mega ST 4: A Reference Machine"
+section: "retro"
+tags: "retro"
+description: "My father's original Mega ST 4, deliberately kept in factory-original condition as a baseline reference."
+layout: base.njk
+parent: "/retro/"
+---
+<h1>The Heirloom Mega ST 4: A Reference Machine</h1>
+<div class="detail-content">
+
+<p>This is my father's original Mega ST 4, deliberately kept in its historical, unmodified condition. It's the one machine in the fleet that stays true to how it left the factory.</p>
+
+<h2>Current State</h2>
+<ul>
+<li>Original TOS 1.04 reinstalled (onboard ROM, no external TOS switcher).</li>
+<li>No modern expansions active, no MonSTerBoard, no Cloudy/Storm.</li>
+<li>A classic floppy drive instead of a Gotek or emulator.</li>
+<li>Its own original Atari keyboard and mouse.</li>
+</ul>
+
+<h2>Role in the Fleet</h2>
+<p>This machine serves as a nostalgia and comparison reference. When problems occur on one of the modified Megas, I can test against this unchanged original state to distinguish bus, flash, or configuration errors from genuine hardware faults. It can also be used as a test platform for uncritical experiments, but stays as close to original as possible for nostalgic reasons.</p>
+
+<h2>History</h2>
+<p>The machine spent many years at my parents' house and was fully rebuilt and brought back into operation by me after I got seriously back into retro computing in 2020.</p>
+
+</div>