Int 61 Fn 1F  - Atari Portfolio - Get Key/nmi-invoked Screen Refresh       [b]

   AH = 1Fh
   AL = function
       00h get state
       01h set state
       DH = new refresh-on-NMI state
           (00h disabled, 01h enabled, bit 7 set = don't change)
       DL = new refresh-on-key state

Return: DH,DL = current/old states

See Also: AH=00h"Portfolio",AH=1Eh"Portfolio",AH=20h"Portfolio"