INT 21 - Novell NetWare shell 3.01 - TASK MODE CONTROL
AH = B5h
AL = subfunction
03h get task mode
Return: AH = 00h
AL = current task mode byte
04h get task mode pointer
Return: ES:BX -> task mode byte
Notes:  the task mode byte specifies how task cleanup should be performed, but
is declared to be version-dependent
allows a program to disable the automatic cleanup for programs managing
task swapping, etc.

Values for task mode byte in version 3.01:
00h-03h reserved
04h     no task cleanup


21B5 - Novell NetWare shell 3.01 - TASK MODE CONTROL