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What monitors will work with my IIci/IIsi?

April 26, 2017iici iisi monitors

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What monitors will work with my IIci/IIsi?

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The IIsi and IIci, which have the same video subsystem, cannot drive a standard VGA monitor. However, any monitor supporting a 67Hz refresh rate, sync-on-green, and the proper horizontal and vertical refresh rates will work. This includes many Sony monitors and the Apple Portrait Display. Apple’s multisync monitors such as the Multiple Scan 15 do NOT support sync-on-green, and will not work properly with the built-in video. The Apple Two-Page Display is also incompatible with built-in video on these two Macs. Some Mac-to-VGA monitor adapters can properly separate the sync signals of monitors that do not sync on green, thus enabling otherwise incompatible monitors to be used with the IIci or IIsi (at a price, usually around US$50). The Apple Developer Hardware Tech Note #8 has pinout information for the IIci and IIsi DB-15 video ports if you want to make your own adapter.