Int 21 Fn DF03 - Software Carousel - Get Partition Size And Program Stat [T]
AX = DF03h
BL = task number
Return: AL = status
00h Carousel not running
01h successful
BL = partition state (00h no program running, 01h prog running)
DX = partition size in KB
FFh unsucessful
AH = error code (01h) (see #1501)
See Also: AX=DF05h