Int 61 Fn 0D  - Atari Portfolio - Get Screen Size                          [b]

   AH = 0Dh

Return: AX = physical screen size (AH=rows, AL=columns)
   DX = logical screen size (DH=rows, DL=columns)

See Also: AH=00h"Portfolio",AH=0Bh"Portfolio",AH=0Eh"Portfolio"