Online HelpPC 2.10      Quick Reference Utility     Copyright 1991 David Jurgens

 
                        INT 2A,87 - Critical Section                        
                                                                                
                                                                                
        AH = 87h                                                                
        AL = 00  start critical section                                         
           = 01  end critical section                                           
                                                                                
                                                                                
        returns nothing                                                         
                                                                                
                                                                                
        - specifies the start or end of a critical section                      
        - called by PRINT.COM                                                   
        - see  Bibliography reference to "Undocumented DOS"                     
                                                                                
 

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