From b8558f3c2057feb27a9f5200e5578a69e88bd180 Mon Sep 17 00:00:00 2001 From: Stefan Koelle Date: Sat, 12 Sep 2026 21:06:52 +0200 Subject: [PATCH] Fix ET4000 VGA connection description: direct, not via adapter --- retro/et4000-experiment/index.njk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/retro/et4000-experiment/index.njk b/retro/et4000-experiment/index.njk index a7129de..39af049 100644 --- a/retro/et4000-experiment/index.njk +++ b/retro/et4000-experiment/index.njk @@ -31,7 +31,7 @@ parent: "/retro/"
  • The missing -12V, 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.
  • Heat with nowhere to go, the card runs hot, and the Mega ST case has zero provision for active cooling.
  • Signal integrity issues, 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.
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  • DVI incompatibility, 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 VGA adapter instead.
    • +
  • DVI incompatibility, 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. The ET4000 has its own VGA output and connects directly to the monitor. The self-built VGA adapter on the Atari's native VGA output is only used as a fallback for diagnostics, when something goes wrong during boot before the ET4000 driver loads.

    • How It Got Working