DIP switch settings for video controller (SW1)

CRT/LCD

Switch settings

 

 

Configuration

7

8

9

10

 

 

 

 

 

Selects MDA (monochrome

OFF

ON

OFF

OFF

display adapter) to use

 

 

 

 

monochrome display (CRT only)

 

 

 

 

Selects CGA (color graphics adapter) to use color or enhanced color display;

40 characters x 25 lines

Selects CGA to use color or enhanced color display; 80 characters x 25 lines

ON OFF OFF ON

ON OFF OFF OFF

Selects EGA (enhanced graphics adapter) to use enhanced color display in normal mode

Selects EGA (enhanced graphics adapter) to use enhanced color display in enhanced mode

OFF ON ON ON

OFF ON ON OFF

The following switches are located on SW1. These DIP switches define how the video controller is interpreted by the computer.

Switch l-This switch is not used and must always be set to ON.

Switch 2-This switch defines the type of external monitor attached to the computer.

Set this switch to ON if you have attached an external EGA monitor.

Set this switch to OFF if you have attached an external monochrome or RGB monitor.

A-6 DIP Switches and Slide Switches