File:  [gforth] / gforth / arch / misc / asm.fs
Revision 1.7: download - view: text, annotated - select for diffs
Fri Dec 31 13:23:59 2004 UTC (17 years ago) by anton
Branches: MAIN
CVS tags: HEAD
updated copyright years for files changed in 2004

    1: \ PIE MISC assembler
    2: 
    3: \ Copyright (C) 1998,2000,2003,2004 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: 
   21: Vocabulary assembler
   22: also assembler also definitions forth
   23: \ [IFUNDEF] cross
   24: \ : X ;
   25: \ [THEN]
   26: 
   27: \ sources
   28: 
   29: $0 Constant PC		$1 Constant PC+2
   30: $2 Constant PC+4	$3 Constant PC+6
   31: 
   32: $8 Constant ACCU	$9 Constant SF
   33: $A Constant ZF		$C Constant CF
   34: 
   35: \ destinations
   36: 
   37: $0 Constant JMP		$1 Constant JS
   38: $2 Constant JZ		$4 Constant JC
   39: 
   40: $7 Constant *ACCU
   41: ( $8 Constant ACCU )	$9 Constant SUB
   42: ( $A Constant SUBR )	$B Constant ADD
   43: $C Constant XOR		$D Constant OR
   44: $E Constant AND		$F Constant SHR
   45: 
   46: $FFFC Constant txd
   47: $FFFF Constant rx?
   48: $FFFE Constant rxd
   49: \ $FFF0 Constant tx
   50: 
   51: : end-label previous ;
   52: 
   53: Create marks $10 cells allot
   54: 
   55: : ahere X here 2/ ;
   56: 
   57: : m ( n -- ) cells marks + ahere 2* swap ! 0 ;
   58: : r ( n -- ) cells marks + @ ahere swap s" !" evaluate 0 ;
   59: 
   60: \ intel hex dump
   61: 
   62: : 0.r ( n1 n2 -- ) 0 swap <# 0 ?DO # LOOP #> type ;
   63: 
   64: : tohex ( dest addr u -- )  base @ >r hex
   65:   ." :" swap >r >r
   66:   r@ dup 2 0.r  over 4 0.r  ." 00"
   67:   over 8 rshift + +
   68:   r> r> swap bounds ?DO  I ( 1 xor ) c@ dup 2 0.r +  LOOP
   69:   negate $FF and 2 0.r  r> base ! ;
   70: 
   71: : 2hex ( dest addr u -- )
   72:   BEGIN  dup WHILE
   73:          >r 2dup r@ $10 min tohex cr
   74:          r> $10 /string 0 max rot $10 + -rot
   75:   REPEAT  drop 2drop ;
   76: 
   77: \ : sym 
   78: \    base @ >r hex
   79: \    cr ." sym:s/PC=" ahere 4 0.r ." /" bl word count type ." /g" cr
   80: \    r> base ! ;
   81: : sym bl word drop ;
   82: 
   83: : label 
   84:   >in @ bl word count X here symentry >in !
   85:   ahere Constant ;
   86: 
   87: : code
   88:   -1 ABORT" Need end-code or end-label before a new code definition" ;
   89: 
   90: also forth definitions
   91: 
   92: : label also assembler label ;
   93: 
   94: : (code) also assembler ;
   95: : (end-code) previous ;
   96: 
   97: previous previous previous
   98: 

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