Note: The Macintosh LC requires that pin 4 (SENSE0) be connected to Ground to signal the connection of a 640 x 480 monitor. The vertical synchronization signal is supplied on pin 12. The Macintosh LC does not supply vertical synchronization with the Green video signal (pin 5). Table 2 - Macintosh LC External Video Connector Table 2 documents the pinout descriptions of the Macintosh LC video connector: Do not connect pins 7 or 10 as they are unused on original Macintosh II Video Cards and there are built-in pullup resistors on the newer Macintosh II Video Card and Macintosh IIci to terminate these pins when not in use. The newer Macintosh II Video Cards and Macintosh IIci built-in video require that pin 4 (SENSE0) be connected to Ground to signal the connection of a 640 x 480 monitor. The external video connector on the early version of the Macintosh II Video Card did not have the signals SENSE0, SENSE1, and SENSE2. This new card is sold in four- and eight-bit configurations (M0322 and M0324, respectively). The Macintosh II High-Resolution Display Video Card is the newer replacement for the original four- and eight-bit Macintosh II Video Card (M0211 and M5640). Table 1 - Macintosh II Video Card and Macintosh IIci Built-in Video Table 1 documents the pinout descriptions of the Macintosh II Video Cards and the Macintosh IIci built-in video: This Technical Note describes how to connect the Macintosh II Video Card, Macintosh IIci built-in video, and Macintosh LC video to third-party monitors. Macintosh II to NEC MultiSync (JC-140IP3A) Macintosh II to Sony Multiscan (CPD-1302) Technical Note HW08: Color Monitor Connections More information about Macs and video monitors is on my Mac Parts Web page. This note is provided for the convenience of Apple Mac now-vintage computer owners. Content copyright Apple.Īs of 2012 Apple's legacy Tech Notes may be found at
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