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Connecting an Apple Monitor to VGA
Posted by: superseth on 2026-03-06 13:16:27 So I have done a lot of connecting VGA monitors to Vintage Macs using adapters, but what about using some of these old CRT's I have with a modern machine? Has anyone cooked up a solution for getting 1152×870 at 67hz on the right pins?
Posted by: joevt on 2026-03-06 14:32:00 I wonder if any modern GPUs support Apple Sense codes? https://tinkerdifferent.com/threads/documentation-for-db15-to-vga-adapters.318/post-21288 If not, then you'll need to setup a custom timing that matches whatever is required by the display. Here's some timings at: https://github.com/joevt/dingusppc/...rv/dingusvideopci/GraphicsHALDingusVideoPCI.c Multiply pixel clock by 10. I don't know if you need to use any more pins than R, G, B, Vsync, Hsync. Do any Apple displays require sync on green? composite Sync?
Posted by: gsteemso on 2026-03-06 18:59:17 I vaguelly recall at least one of the very early CRT monitors used Sync-on-Green. No idea which one(s), though.
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