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TNL SN20-9844 (March 1987) to 75X0235
Description
Introduction
The Extended Monochrome Graphics Display Adapter attaches to the system I/O channel and
drives a 60 Hz noninterlaced monochrome monitor (1024 X 768 picture elements-pels). The
adapter has a graphic operation processor which provides bit manipulation facilities that
enhance the management and presentation of text, graphics, and image information.
Note: Programming and addressing considerations preclude the use of an Extended
Monochrome Graphics Display Adapter in PC-AT systems.
Advanced features include:
•
A fast graphic operation processor which can do bit block transfers, line draw, image
copy/merge, and rotate
•
Graphic operation command queue with synchronization and branch control for animation
•
Hardware controlled cursor which provides instant cursor movement with no obstruction to
graphic operations
•
An I/O interface which supports direct bit addressability in both horizontal and vertical
(orthogonal) access directions
•
DMA as an alternate controller for image and character transfers from system memory.
Extended Monochrome Graphics Adapter
1
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