1618 NORMAL : POKE 32,2: POKE 33,38: VTAB 5: CALL - 958: POKE 32,0: POKE 33,40
The POKES define the left and right columns (Atari BASIC used 82 and 83)
VTAB HTAB stuff could be POKED into 84 and 85 (in Microsoft BASIC) or PRINT #0, AT (VTAB#,HTAB#); or similiar. may have that backwards...
Call -958 Clears the bottom of the text screen (I'm guessing the bottom 3-4 lines)
Then then restores the left and right columns.
My best guess is there would need to be a subroutine that would clear parts of the screen using an X,Y,W, H to clear a line or box.