Maintenance and Service Guide  4-11
Addendum 108431-001 (11-88) to 
Manual No. 108033-003
Lightpen
The Lightpen selection verifies that the lightpen 
is operating properly with the color monitor.
Display Memory Pages
The Display Memory Pages selection verifies  
that the system can address all eight pages  
(0 through 7) of the memory on the video display 
controller. A display similar to Screen 6 appears 
for the eighth page.
Screen 6.