Int 61 Fn 0E  - Atari Portfolio - Get/set Screen Mode                      [b]

   AH = 0Eh
   AL = function
       00h get mode
       01h set mode
       DL = new mode (see #3131)

Return: DL = current/old mode

Note:  if changing the mode places the cursor position or virtual screen
     origin outside the displayed area, the screen origin will be reset
     to (0,0), the screen cleared, and the cursor position set to (0,0)

See Also: AH=00h"Portfolio",AH=0Dh"Portfolio",AH=0Fh"Portfolio",INT 10/AH=00h

Bitfields for Atari Portfolio screen mode:
Bit(s) Description (Table 3131)
 0 40x8 mode instead of 80x25
 1 tracked mode
 7 graphics

Note:  the above bits are mutually exclusive