Zenith Z-100 PC series Service Manual page 242

Introduction
The Color Video/Floppy Controller Card combines the capabilities of the
Z-309-A Video Card and the Floppy Disk Controller Card. This single card
provides all of the functions and operations previously supplied by each
separate card. Video Circuitry and floppy disk controller circuitry may be
viewed as two discrete circuits responsible for controlling and processing
data for the entire card.
The video section of the card provides an interface between the computer
and various display output devices, including a monochrome and a color
monitor. The monochrome output connects to an RCA phono jack, and
the RGBI output connects to a 9-pin, D-type connector. Both connectors
are located directly on the card and project through the rear of the com ­
puter cabinet. An optional light pen also may be interfaced to the computer
through this card. The light pen connects to a 6-pin connector strip located
on the card.
The floppy disk controller section of the card is capable of supporting
two separate internal disk drives, and provides communication to peripher­
als through a single DTE serial channel.
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