)
Values for DOS critical section number:
 01h	DOS kernel, SHARE.EXE, DOSMGR
	apparently for maintaining the integrity of DOS/SHARE/NET
	  data structures
 02h	DOS kernel, DOSMGR
	ensures that no multitasking occurs while DOS is calling an
	  installable device driver
 05h	network redirector
 06h	DOS 4.x only IFSFUNC
 08h	ASSIGN.COM
 0Ah	MSCDEX, CORELCDX
 0Fh	IBM PC LAN server (while intercepting INT 10/AH=06h,07h,0Eh)