Post #2113710
2025-02-28 20:15 UTC
Replies (2)
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@paulrickards@mastodon.social 2025-03-04 03:44
Back to the Duo Dock logic board "Gemini" logic board PSU connector pin out. I found a couple of sources. 1st, a picture of the PSU connector to the logic board showing the wire colors. 2nd, a forum post where someone troubleshoots a PSU. I've confirmed the GND, +5V, and +12V pins correctly (SCSI power) but I can't be sure of the others. What do white, yellow, brown, and light blue wires typically do in an Apple PSU of that era? #RetroComputing #VintageMac
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@me_@sueden.social 2025-02-28 21:03
@paulrickards@mastodon.social I always wondered if you simply had to add a 68k CPU to the Duo Dock to build a complete Mac... I don't have a pinout, but the voltages are listed as +5, +12, -12 and +19V on p. 13 of https://cdn.preterhuman.net/texts/computing/apple_hardware_devnotes/PowerBook%20Duo%20Dock%20II.pdf This document also refers to Chapter 14, "Macintosh Duo Dock Hardware," of "Macintosh Developer Notes, Number 2" which I was unable to find. Strangely, the pinout for the connector to the Powerbook shows "Raw +24V from AC adapter" lines here: https://allpinouts.org/pinouts/connectors/buses/apple-duo-dock/