INT 2F,3 - Multiplex Interrupt - Cancel all files
AL = 03 AH = 01 resident portion of PRINT 02 resident portion of ASSIGN 10 resident portion of SHARE B7 resident portion of APPEND C0-FF reserved for user applications returns nothing
AL = 03 AH = 01 resident portion of PRINT 02 resident portion of ASSIGN 10 resident portion of SHARE B7 resident portion of APPEND C0-FF reserved for user applications returns nothing