TABLE OF CONTENTS 4. Keyboard and speaker 4-1 4.1 Keyboard 4-1 4.1.1 Accessing the keyboard 4-6 4.1.2 Special function keys and switches 4-8 4.2 Speaker 4-10 5.
The video display 5-1 5.1 Text modes 5-4 5.1.1 Character sets 5-5 5.1.2 Memory mapping 5-8 5.1.2.1 40-column text 5-8 5.1.2.2 80-column text 5-10 5.2 Graphics modes 5-12 5.2.1 Low-resolution graphics 5-13 5.2.2 Double-low-resolution graphics 5-15 5.2.3 High-resolution graphics 5-19 5.2.3.1 Monochrome high- resolution graphics 5-19 5.2.3.2 Color high-resolution graphics 5-22 5.2.4 Double-high-resolution graphics 5-25 5.2.4.1 Monochrome double- resolution graphics 5-25 5.2.4.2 Color double-high- resolution graphics 5-28 5.3 Mixed graphics/text modes 5-32 5.4 Secondary display page 5-33 III