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Annotation of gforth/arch/misc/asm.fs, revision 1.6

1.1       pazsan      1: \ PIE MISC assembler
                      2: 
1.6     ! pazsan      3: \ Copyright (C) 1998,2000,2003 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: 
1.1       pazsan     21: Vocabulary assembler
                     22: also assembler also definitions forth
1.4       jwilke     23: \ [IFUNDEF] cross
                     24: \ : X ;
                     25: \ [THEN]
1.1       pazsan     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: 
1.3       pazsan     40: $7 Constant *ACCU
1.1       pazsan     41: ( $8 Constant ACCU )   $9 Constant SUB
1.2       pazsan     42: ( $A Constant SUBR )   $B Constant ADD
1.1       pazsan     43: $C Constant XOR                $D Constant OR
                     44: $E Constant AND                $F Constant SHR
                     45: 
1.4       jwilke     46: $FFFC Constant txd
                     47: $FFFF Constant rx?
                     48: $FFFE Constant rxd
1.1       pazsan     49: \ $FFF0 Constant tx
                     50: 
                     51: : end-label previous ;
                     52: 
                     53: Create marks $10 cells allot
                     54: 
1.4       jwilke     55: : ahere X here 2/ ;
1.1       pazsan     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: 
1.4       jwilke     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 ;
1.1       pazsan     86: 
1.5       jwilke     87: : code
                     88:   -1 ABORT" Need end-code or end-label before a new code definition" ;
                     89: 
1.1       pazsan     90: also forth definitions
                     91: 
                     92: : label also assembler label ;
                     93: 
                     94: : (code) also assembler ;
                     95: : (end-code) previous ;
                     96: 
                     97: previous previous previous
1.4       jwilke     98: