{*******************************************************}
{                                                       }
{     Turbo Pascal Version 4.0                          }
{     SYSTEM Unit Interface Documentation               }
{     (Only the variables are listed. For a complete    }
{      reference to System functions and procedures,    }
{      refer to the Owner's Handbook)                   }
{                                                       }
{     Copyright (c) 1987 by Borland International, Inc. }
{                                                       }
{*******************************************************}

unit System;

interface

var
  Input: Text;          { Input standard file }
  Output: Text;         { Output standatd file }
  PrefixSeg: Word;      { Program segment prefix }
  HeapOrg: Pointer;     { Heap origin }
  HeapPtr: Pointer;     { Heap pointer }
  FreePtr: Pointer;     { Free list pointer }
  FreeMin: Word;        { Minimum free list size }
  HeapError: Pointer;   { Heap error function }
  ExitProc: Pointer;    { Exit procedure }
  ExitCode: Integer;    { Exit code }
  ErrorAddr: Pointer;   { Runtime error address }
  RandSeed: Longint;    { Random seed }
  SaveInt00: Pointer;   { Saved interrupt $00 }
  SaveInt02: Pointer;   { Saved interrupt $02 }
  SaveInt23: Pointer;   { Saved interrupt $23 }
  SaveInt24: Pointer;   { Saved interrupt $24 }
  SaveInt75: Pointer;   { Saved interrupt $75 }
  FileMode: Byte;       { File open mode }

implementation