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─────Run-Time Library───────────────────────────────────────────────────────
 
  Variable:  _psp
 
  Include:   <stdlib.h>
 
  Syntax:    unsigned _psp;
 
     The _psp variable contains the segment address of the program
     segment prefix (PSP) for the process. The PSP contains execution
     information about the process, such as a copy of the command line
     that invoked the process and the return address on process
     termination or interrupt. The _psp variable can be used to form a
     long pointer to the PSP, where _psp is the segment value and 0 is
     the offset value.
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