ZV Port (Zoomed Video Port)
ZV Port (Zoomed Video Port) – Used on laptops, the ZV Port is a pointto-point unidirectional bus between the PC Card host adapter and the graphics controller, enabling video data to be transferred real-time directly from the PC Card into the graphics frame buffer. The PC Card host adapter has a special multimedia mode configuration. If a non-ZV PC Card is plugged into the slot, the host adapter is not switched into the multimedia mode, and the PC Card behaves as expected. Once a ZV card has been plugged in and the host adapter has been switched to the multimedia mode, the pin assignments change. The PC Card signals A4-A25, SPKR#, INPACK# and I0IS16# are replaced by ZV Port video signals (Y0-Y7, UV0-UV7, HREF, VSYNC, PCLK) and 4-channel audio signals (MCLK, SCLK, LRCK, and SDATA).
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