1. Screen Display Module M15.2 Sections 9.5, 13.1, 13.2

2. Screen Display Basic Screen Output –DOS Character Output –Set Cursor –String Output Raster Scan Displays The Video RAM

3. Screen Output

6. Print string on bottom line of screen Use /MA to enter string at address 0000. END STRING WITH $ SIGN

7. Program to display Hello on bottom line

8. Screen Display Basic Screen Output –DOS Character Output –Set Cursor –String Output Raster Scan Displays The Video RAM

9. Raster Scan Displays Electron beam CRT

10. Raster Scan Characters 9 14

11. Character generator 1 1 1 1 1 0 0 0 Shift register Video signal Row select 54 48 45 T H E Character line 1 (40 words or 80 bytes) Character line 2 (40 words or 80 bytes) even addresses odd addresses

12. Attribute Byte BLIR G B Foreground Intensity bit 0 = normal intensity 1 = high intensity Blinking bit 0 = not blinking 1 = foreground blinking Background 7 6 5 4 3 2 1 0

13. Screen Display Basic Screen Output –DOS Character Output –Set Cursor –String Output Raster Scan Displays The Video RAM

15. Video RAM Segment Addresses CGA, EGA, VGA

16. Video RAM - 40 columns

17. Video RAM - 80 columns

18. Video Ram Segment at $B800