diff --git a/retro/atari-vga/index.njk b/retro/atari-vga/index.njk index b0122dd..06cf7e5 100644 --- a/retro/atari-vga/index.njk +++ b/retro/atari-vga/index.njk @@ -23,6 +23,15 @@ parent: "/retro/"

A note on monitors

Passive RGB-to-VGA adapters output the Atari's native timings, so color modes (ST Low and ST Medium) need a monitor that can lock to a 15 kHz horizontal sync signal. See my monitor compatibility page for which modern panels actually work. Mono mode (ST High) works on any standard VGA display.

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VGA switch setup

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A 3-port VGA switch box routes the shared Dell monitor between the different machines:

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PortVGAUSB
1Atari Mega 4 "High" (direct)Raspberry Pi (not connected, otherwise no reboot)
2MiSTMiST
3MiSTerMiSTer
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Gallery

The MCSWITCH VGA adapter connected to the Atari

The MCSWITCH adapter on the Mega ST 4 "Low" machine.

diff --git a/retro/et4000-experiment/index.njk b/retro/et4000-experiment/index.njk index 71b117d..a7129de 100644 --- a/retro/et4000-experiment/index.njk +++ b/retro/et4000-experiment/index.njk @@ -31,6 +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.

    • How It Got Working