AT&T PC 6300 - Page 54

SYSTEM OVERVIEW
The character attributes of reverse video, blinking, highlight, hide,
and underline are available in the alphanumeric modes. In the
color mode, 4 colors chosen from a palette of 16 can be displayed
simultaneously. For a monochrome monitor, various shades of
green are displayed to simulate a color display.
The P4 (Revision 5 or Higher) and P8 Display Controllers have
VIDEO DISABLE capability. Refer to Appendix A for disable
instructions.
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The display controllers contain 32 KB of arbitrated RAM for use
as video refresh memory. The Display Controllers use a 6845 CRT
controller. The 6845 controller operates at either 25 MHz, 19 MHz, pi
or 12 MHz depending on the mode and resolution selected. j |
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