MORE DISPLAY HANDLER ROUTINES
Take the row number and column number that the cursor is on and figure out what memory location that corresponds to.
Convert an internal character value to its ATASCII value.
Clear the line that the cursor is currently on.
Scroll the screen.
Draw a line from OLDROW,OLDCOL to ROWCRS,COLCRS (locations 90 through 92 and 84 through 86).
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