File:  [gforth] / gforth / arch / misc / asm.fs
Revision 1.9: download - view: text, annotated - select for diffs
Mon Dec 31 19:02:24 2007 UTC (14 years, 11 months ago) by anton
Branches: MAIN
CVS tags: v0-7-0, HEAD
updated copyright year after changing license notice

    1: \ PIE MISC assembler
    2: 
    3: \ Copyright (C) 1998,2000,2003,2004,2007 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 3
   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, see http://www.gnu.org/licenses/.
   19: 
   20: Vocabulary assembler
   21: also assembler also definitions forth
   22: \ [IFUNDEF] cross
   23: \ : X ;
   24: \ [THEN]
   25: 
   26: \ sources
   27: 
   28: $0 Constant PC		$1 Constant PC+2
   29: $2 Constant PC+4	$3 Constant PC+6
   30: 
   31: $8 Constant ACCU	$9 Constant SF
   32: $A Constant ZF		$C Constant CF
   33: 
   34: \ destinations
   35: 
   36: $0 Constant JMP		$1 Constant JS
   37: $2 Constant JZ		$4 Constant JC
   38: 
   39: $7 Constant *ACCU
   40: ( $8 Constant ACCU )	$9 Constant SUB
   41: ( $A Constant SUBR )	$B Constant ADD
   42: $C Constant XOR		$D Constant OR
   43: $E Constant AND		$F Constant SHR
   44: 
   45: $FFFC Constant txd
   46: $FFFF Constant rx?
   47: $FFFE Constant rxd
   48: \ $FFF0 Constant tx
   49: 
   50: : end-label previous ;
   51: 
   52: Create marks $10 cells allot
   53: 
   54: : ahere X here 2/ ;
   55: 
   56: : m ( n -- ) cells marks + ahere 2* swap ! 0 ;
   57: : r ( n -- ) cells marks + @ ahere swap s" !" evaluate 0 ;
   58: 
   59: \ intel hex dump
   60: 
   61: : 0.r ( n1 n2 -- ) 0 swap <# 0 ?DO # LOOP #> type ;
   62: 
   63: : tohex ( dest addr u -- )  base @ >r hex
   64:   ." :" swap >r >r
   65:   r@ dup 2 0.r  over 4 0.r  ." 00"
   66:   over 8 rshift + +
   67:   r> r> swap bounds ?DO  I ( 1 xor ) c@ dup 2 0.r +  LOOP
   68:   negate $FF and 2 0.r  r> base ! ;
   69: 
   70: : 2hex ( dest addr u -- )
   71:   BEGIN  dup WHILE
   72:          >r 2dup r@ $10 min tohex cr
   73:          r> $10 /string 0 max rot $10 + -rot
   74:   REPEAT  drop 2drop ;
   75: 
   76: \ : sym 
   77: \    base @ >r hex
   78: \    cr ." sym:s/PC=" ahere 4 0.r ." /" bl word count type ." /g" cr
   79: \    r> base ! ;
   80: : sym bl word drop ;
   81: 
   82: : label 
   83:   >in @ bl word count X here symentry >in !
   84:   ahere Constant ;
   85: 
   86: : code
   87:   -1 ABORT" Need end-code or end-label before a new code definition" ;
   88: 
   89: also forth definitions
   90: 
   91: : label also assembler label ;
   92: 
   93: : (code) also assembler ;
   94: : (end-code) previous ;
   95: 
   96: previous previous previous
   97: 

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