INT 2F U - DOS 4.x only SHELLB.COM - SHELLB transient to TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user. The name comes from the name of the DOS function call used to remain in memory after termination. interface AX = 1904h Return: ES:DI -> name of current shell batch file: WORD number of bytes of name following BYTEs (8 max) uppercase name of shell batch file