Int 21/AX=DF0Bh

Software Carousel - SET TASK SWITCH CALLBACK

AX = DF0Bh
BH = interrupt number or 00h
BL = function number to invoke on partition switch
CL = function number to call when it is safe for resident programs
to perform DOS calls
DS:DX -> FAR function to call if BH=00h

Return:
AL = status
00h Carousel not running
01h successful
FFh unsucessful
AH = error code (01h,03h) (see #01813)

Notes: The specified interrupt or FAR function is called with AH set to the appropriate one of the values specified in BL and CL, and BL set to the new task number. The function specified by CL will not be called until the notification is enabled with AX=DF0Ch

See Also: AX=DF0Ch

Category: DOS-Based Task Switchers/Multitaskers - Int 21h - S

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