AT&T 6300 Service Manual page 65

SYSTEM OVERVIEW
4. Simultaneous display of characters and graphics.
5. Simultaneous use of either a Monochrome and Color Display
or two Color Displays. (The System Module Power Supply will
not support the simultaneous use of two Monochrome
Displays.)
6. Compatibility between the Display Enhancement Board (in the
transparent mode) and the IBM PC graphics software.
The Display Enhancement Board plugs into one of the dual-row
expansion slots on the Bus Expansion Board. It is connected to the
Display Controller Board by a ribbon cable.
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