Int 21 Fn DF0A  - Software Carousel - Get Memory Size/partition Number Of  [T]

   AX = DF0Ah

Return: AL = status
       00h Carousel not running
       01h successful
       BL = task number
       DX = memory size in KB
       FFh unsucessful
       AH = error code (01h,03h) (see AX=DF01h)