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Old 28 March 2012, 02:07   #60
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Join Date: Sep 2008
Location: Gainesville U.S.A.
Posts: 619
Originally Posted by Garyc2012 View Post
The other thing was the code wrote DIRECTLY to memory addresses as well as the video address if I remember rightly and thats another reason this will never work in a dos shell etc, it needed Real mode or linux with all other interrupts halted.
It could also be that the line is partially written when screen is scanning near the bottom but not quite complete before the top line is drawn. The video memory would only have been partially refreshed then. The video buffer would have bits of the new and previous screen.

EDIT: It's too bad that Gary, the guy who needs this thing, is having the most trouble with it.

Last edited by clenched; 28 March 2012 at 02:20.
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