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> iBook Developer Note
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The combined audio and video output jack on the iBook computer provides a composite video signal for a TV monitor. The video output mirrors the flat panel display: internal and external video share the same buffer, and the hardware sends the image to both displays.
The A/V jack on the iBook computer is the same size and location as the headphone jack on previous models. The jack still accepts a standard stereo mini-plug, but it also accepts a special mini-plug that has an additional contact for the video signal; see A/V Jack. An adaptor cable with separate RCA-type connectors for stereo audio and composite video outputs is available.
Two display sizes are supported: 640 by 480 and 800 by 600 pixels. The composite video can be displayed on either an NTSC monitor or a PAL monitor. When a monitor is connected by way of the A/V jack, the computer detects the presence of the A/V mini-plug and enables the composite video output. The settings for the display sizes and standards (NTSC or PAL) are then selectable in the Monitor control panel or control strip.