Int 49 Fn 0006  - Magic V1.16+ - Get Size Of Full Screen                   [a]

   AX = 0006h

Return: AX = status
       0000h successful
       BX = vertical size (char rows or pixel rows)
       DX = horizontal size (char cols or 8-pixel units)
       FFFFh MAGic busy, retry later
       BX,DX destroyed
   CX destroyed

See Also: AX=0001h,AX=0005h,AX=0007h