Epson 20 Manuel D’Utilisation

To 

check your 640x200 graphics mode, press 6 then 

Enter. 

The

screen displays three patterned squares against a contrasting

background, as shown below.

640X200 GRAPHICS MODE CHECK

Is the display correct (Y/H)?

I

If the patterns on your screen are clear and distinct, press Y and then

Enter. 

If any pattern is not clear, first check the adjustment of your

monitor, and then make sure that both ends of the cable are plugged

in firmly. If a problem still exists, press 

N 

and 

Enter 

to display the

error message.

To check the screen paging of your monitor, press 7 and 

Enter. 

The

video RAM on the color graphics adapter is divided into eight
independent display pages. This test checks the eight pages by first

filling all eight with a number corresponding to the page, and then

displaying each page in turn. You see the following pattern for screen
0.

C-16

Performing System