INT 2F - JAM.SYS v1.10+ - "Detach" - UNMOUNT COMPRESSED DRIVE
	AX = 5203h
	DL = drive number (0-default, 1-A:, etc.) to detach
Return: AH = status (00h,01h,04h,05h,08h,09h,0Bh,0Dh) (see #02835)
	AL = host drive error code (see #02598 at INT 2F/AX=0802h)
SeeAlso: AX=5202h