File:  [gforth] / gforth / ec / Attic / mirrored.fs
Revision 1.2: download - view: text, annotated - select for diffs
Tue Dec 8 22:02:59 1998 UTC (23 years, 8 months ago) by anton
Branches: MAIN
CVS tags: v0-4-0, HEAD
updated dates in copyright messages
inserted copyright messages in most files that did not have them
removed outdated files engine/32bit.h engine/strsig.c

    1: \ mirror.fs mirrors ram in rom and copies back at startup
    2: 
    3: \ Copyright (C) 1998 Free Software Foundation, Inc.
    4: 
    5: \ This file is part of Gforth.
    6: 
    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.
   11: 
   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.
   16: 
   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.
   20: 
   21: 0 [IF]
   22: 
   23: For the romable feature:
   24: 
   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.
   27: 
   28: [THEN]
   29: 
   30: \ save ram area
   31: 
   32: unlock >CROSS
   33: 
   34: : saveram
   35:   mirror-link 
   36:   BEGIN @ dup WHILE
   37: 	>r r@ >rstart @ r@ >rdp @ over - tuck
   38: 	2dup X , X , X here swap tcmove
   39: 	X allot X align
   40: 
   41: >rom
   42: unlock sramdp @ lock		constant ram-start
   43: unlock ramdp @ sramdp @ - lock	constant ram-len
   44: variable ram-origin
   45: ram-start ram-origin ram-len unlock tcmove lock 
   46: ram-len allot align
   47: >auto
   48: 
   49: : mirrorram
   50:   ram-origin ram-start ram-len cmove ;
   51: 

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