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Reframe Mega ST 2 as spare/test machine, not parts donor; add 4MB idea and history

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stefankoelle
2026-09-12 01:56:19 +02:00
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---
title: "The Mega ST 2: Spare, Test and Donor Machine"
title: "The Mega ST 2: Spare and Test Machine"
section: "retro"
tags: "retro"
description: "The Mega ST 2 that serves as a spare, test and parts donor machine for the rest of the Atari fleet."
description: "The Mega ST 2 that serves as a spare and test machine for the rest of the Atari fleet."
layout: base.njk
parent: "/retro/"
---
<h1>The Mega ST 2: Spare, Test and Donor Machine</h1>
<h1>The Mega ST 2: Spare and Test Machine</h1>
<div class="detail-content">
<p>The Mega ST 2 was given to me a while ago and today serves as a spare and test machine for the rest of the fleet.</p>
@@ -14,12 +14,13 @@ parent: "/retro/"
<h2>Current State</h2>
<p>It runs on original TOS with the internal RAM configuration, without the separate 4 MB expansion, which was removed for testing purposes and now sits set aside.</p>
<h2>Role as Parts Donor</h2>
<p>The original power supply was moved to the <a href="/retro/mega-st-high/">Mega ST 4 "High"</a> during its rebuild, and the Mega ST 2 now runs with the network hardware that used to be in the "High" machine. It serves as a safe platform to test upgrades and expansions before they're installed in the production machines, such as reinstalling the 4 MB expansion, trying other bus cards, or testing ROMs.</p>
<h2>History</h2>
<p>Everything in this machine was moved over to the <a href="/retro/mega-st-high/">Mega ST 4 "High"</a> that I was given, including its original power supply. It's not really a parts donor though, it's simply the spare machine now that the new Mega 4 carries the main setup. Back then it had an intermittent fault: after being on for a long time it would eventually show a white screen on boot. I suspect it was again a poorly soldered CPU socket, though I never fully confirmed the cause. With the current setup it runs stably, and the socket in question isn't in use anymore.</p>
<h2>Ideas for This Machine</h2>
<p>A few possible directions for the Mega ST 2, none of them decided yet:</p>
<ul>
<li>Reinstalling the 4 MB expansion, which was only removed for testing and is currently sitting set aside.</li>
<li>An external <a href="/retro/gotek/">Gotek floppy emulator</a>, since an external unit would suit this machine well.</li>
<li>An <a href="/retro/eiffel-pico/">Eiffel Pico USB</a> adapter for a USB keyboard and mouse.</li>
<li>The <a href="/retro/acsi2stm/">ACSI2STM</a> as an ACSI hard disk option.</li>