1: \ mirror.fs mirrors ram in rom and copies back at startup
3: \ Copyright (C) 1998 Free Software Foundation, Inc.
5: \ This file is part of Gforth.
7: \ Gforth is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
9: \ as published by the Free Software Foundation; either version 2
10: \ of the License, or (at your option) any later version.
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
17: \ You should have received a copy of the GNU General Public License
18: \ along with this program; if not, write to the Free Software
19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21: 0 [IF]
23: For the romable feature:
25: We need to save the ram area (there might be initialized variables,
26: and code-fields...) into rom and copy it back at system startup.
30: \ save ram area
33: unlock sramdp @ lock constant ram-start
34: unlock ramdp @ sramdp @ - lock constant ram-len
35: variable ram-origin
36: ram-start ram-origin ram-len unlock tcmove lock
37: ram-len allot align
40: : mirrorram
41: ram-origin ram-start ram-len cmove ;