Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
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Set Extended Error Information Interrupt
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  Interrupt:   21h     Function:   5D0Ah
 
  Title:       Set Extended Error Information [Version 3.1+]
 
  See also:    Get Extended Error Information
 
  Description:
 
     Restores extended error information to a prior state. Function 59h
     must be called first to initialize 11-word data structure with
     error information. Function 5D0Ah restores error data from the
     structure.
 
     Input                            Output
 
     AX = 5D0Ah                       None
     DS:DX = segment:offsetof
             structure
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