home *** CD-ROM | disk | FTP | other *** search
- {
- Dummy BP compatible overlay unit for GPC
-
- Copyright (C) 1998-2001 Free Software Foundation, Inc.
-
- Author: Frank Heckenbach <frank@pascal.gnu.de>
-
- This file is part of GNU Pascal.
-
- GNU Pascal is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU Pascal is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Pascal; see the file COPYING. If not, write to the
- Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA.
-
- As a special exception, if you link this file with files compiled
- with a GNU compiler to produce an executable, this does not cause
- the resulting executable to be covered by the GNU General Public
- License. This exception does not however invalidate any other
- reasons why the executable file might be covered by the GNU General
- Public License.
- }
-
- {$gnu-pascal,B-,I-}
-
- unit Overlay;
-
- interface
-
- const
- ovrOk = 0;
- ovrError = - 1;
- ovrNotFound = - 2;
- ovrNoMemory = - 3;
- ovrIOError = - 4;
- ovrNoEMSDriver = - 5;
- ovrNoEMSMemory = - 6;
-
- const
- OvrEmsPages : Word = 0;
- OvrTrapCount : Word = 0;
- OvrLoadCount : Word = 0;
- OvrFileMode : Byte = 0;
-
- type
- OvrReadFunc = function (OvrSeg : Word) : Integer;
-
- var
- OvrReadBuf : OvrReadFunc;
- OvrResult : Integer = 0;
-
- procedure OvrInit (aFileName : String);
- procedure OvrInitEMS;
- procedure OvrSetBuf (Size : LongInt);
- function OvrGetBuf : LongInt;
- procedure OvrSetRetry (Size : LongInt);
- function OvrGetRetry : LongInt;
- procedure OvrClearBuf;
-
- implementation
-
- procedure OvrInit (aFileName : String);
- var Dummy : Integer;
- begin
- Dummy := Length (aFileName);
- OvrResult := ovrOK
- end;
-
- procedure OvrInitEMS;
- begin
- OvrResult := ovrNoEMSDriver
- end;
-
- procedure OvrSetBuf (Size : LongInt);
- var Dummy : Integer;
- begin
- Dummy := Size
- end;
-
- function OvrGetBuf : LongInt;
- begin
- OvrGetBuf := 0
- end;
-
- procedure OvrSetRetry (Size : LongInt);
- var Dummy : Integer;
- begin
- Dummy := Size
- end;
-
- function OvrGetRetry : LongInt;
- begin
- OvrGetRetry := 0
- end;
-
- procedure OvrClearBuf;
- begin
- end;
-
- end.
-