Function 06h Scroll Page Up - scroll up or clear a display "window"entry AH 06h
AL number of lines blanked at bottom of page
0 = blank entire window
BH attributes to be used on blank line
CH row (Y) of upper left corner or window
CL column (X) of upper left corner of window
DH row (Y) of lower right corner of window
DL column (X) of lower right corner of window
return none
note 1) Push BP before scrolling, pop after
2) If in CGA text mode, affects current page only
Sample Code:
\Asm\Lib\BIOS.INC -@BIOSVidScroll MACRO dist,atrib,upcol,uprow,downcol,downrow