68kMLA Classic Interface

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PowerMac - universal output support cable pinout/circuit diagram available?

Posted by: Trash80toHP_Mini on 2026-04-16 10:45:36 I've got a "magical" video cable that supports any resolution chosen in the Monitors Control Panel from my 6360 or VidCard. No VGA adapter is required for a change! ISTR using it with Beige G3 and a couple of others. Has anyone got links handy for building them?

Posted by: Big Ben on 2026-04-16 11:42:36 Here you have the whole details from the technote: https://developer.apple.com/library/archive/technotes/hw/hw_30.html I had mixes results between different cables and monitors, the video part is always the same but the sense pins are what will make your cable works with multisync or not.

Posted by: Trash80toHP_Mini on 2026-04-16 13:20:04 Thanks much for the link! This cable supports every resolution I've thrown at it without sense line adaptation. I've packed it up with my portable desoldering/soldering equipment. It's custom made, both ends of the cable are off the shelf connectors. If I can't figure it out with a multi-meter, I'll pop off the easier end and slide the cable sleeve off for a look-see. Heading out of town until about the 27th, nice project for visiting the GRLF.

Posted by: joevt on 2026-04-16 13:20:11 More on Apple Sense Codes at: https://tinkerdifferent.com/threads/documentation-for-db15-to-vga-adapters.318/post-21288 The VGA option doesn't use a diode - just a line from sense 1 to sense 2.

Posted by: joevt on 2026-04-16 13:30:14 My fork of the DingusPPC emulator has a function MonitorSenseLines in applesense.cpp that can calculate and draw all the Apple Sense Code possibilities (anything possible with just diodes or wires).

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