INT 2A,81 - End DOS Critical Section

AH = 81h

AL = critical section identifier (00-0F)

= 01 DOS kernel, SHARE.EXE and network data structure integrity

= 02 DOS kernel, device driver exclusivity

= 05 IFSFUNC (Installable File System, IFS, DOS 4.0+)

= 06 IFSFUNC (Installable File System, IFS, DOS 4.0+)

= 08 ASSIGN.COM

returns nothing

- indicates that a critical code section is being exited

- this function is usually hooked rather then called directly from a

user application

- see ~Bibliography" reference to "Undocumented DOS"