8-24  Chapter 8, Jumper Settings and Switch Settings 
Configuration Switch Bank SW1
The setting for configuration switch bank SW1 is 
determined by whether the COMPAQ Enhanced          
Color Graphics Board is to be used as:         
□ The only video display controller board or 
the primary video display controller board 
(the controller board that is active at power-
on or reboot). Refer to Table 8-14.
Table 8-14. SW1 Settings for the COMPAQ Enhanced Color Graphics Board  
as the Only or Primary Video Display Controller Board
Switches
Monitor Type Power-On Mode 1 2                     3 4
COMPAQ Color, compatible  
Enhanced Color, or COMPAQ  
Dual-Mode Monitor
80 × 25 (640 × 350) OFF ON ON OFF
COMPAQ Color, compatible  
Enhanced Color, or COMPAQ  
Dual-Mode Monitor
80 × 25 (640 × 200) ON ON ON OFF
RGBI Color or COMPAQ  
Dual-Mode Monitor
80 × 25 (640 × 200) OFF OFF OFF ON
RGBI Color or COMPAQ  
Dual-Mode Monitor
40 × 25 (320 × 200) ON OFF OFF ON
COMPAQ Dual Mode 
Monitor
80 × 25 (720 × 350) OFF OFF ON OFF
□ The secondary video display controller 
board in the computer. Refer to Table 8-15. 
To change settings, use the end of a pen to toggle 
the switch to the correct position.