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Add VGA switch setup and DVI incompatibility note

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stefankoelle
2026-09-12 21:04:26 +02:00
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retro/et4000-experiment/index.njk
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@@ -31,6 +31,7 @@ parent: "/retro/"
<li><strong>The missing -12V</strong>, many ET4000 cards need -12V for their output drivers, usually tapped from the RS-232 port, adding yet another drain on an already stressed supply. The card I used avoids this.</li>
<li><strong>Heat with nowhere to go</strong>, the card runs hot, and the Mega ST case has zero provision for active cooling.</li>
<li><strong>Signal integrity issues</strong>, the ISA-to-MegaBus adapter introduces reflections at higher frequencies, and access to ET4000 RAM is roughly 65% slower than native ST RAM, with no hardware BitBLT to make up for it.</li>
<li><strong>DVI incompatibility</strong>, the EIZO monitor has DVI-D (digital only), but all available DVI-to-VGA adapters only work with DVI-I (which includes analog lines). Since the EIZO lacks the analog pins, a DVI adapter cannot be used, which is why the ET4000 connects via the self-built <a href="/retro/atari-vga/">VGA adapter</a> instead.</li>
</ul>
<h2>How It Got Working</h2>