Display Memory Organization

Several examples are presented in this section to illustrate the required format of display data for the various video modes.

MDA Mode 7

CGA Mode 3 (High Resolution Color Text)

CGA Mode 6 (High Resolution B&W Graphics)

CGA Mode 4 (Low Resolution Color Graphics)

Default Color Shading

CGA Mode 3, Zoom=81h (Nonstandard Text, 64x18 Color Zoom Mode)

MDA Mode 20h (Nonstandard HP 95LX Graphics Mode)

Int 10h Font Support

Hardware Needs

Compatibility: The Byte-Wide Font

Text Modes

Graphics Modes

Video BIOS Font Services

Bitmap Storage in ROM

Bitmap Storage in RAM

Bitmap Stack