\ PIE MISC assembler
\ Copyright (C) 1998,2000,2003,2004,2007 Free Software Foundation, Inc.
\ This file is part of Gforth.
\ Gforth is free software; you can redistribute it and/or
\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation, either version 3
\ of the License, or (at your option) any later version.
\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\ GNU General Public License for more details.
\ You should have received a copy of the GNU General Public License
\ along with this program. If not, see http://www.gnu.org/licenses/.
Vocabulary assembler
also assembler also definitions forth
\ [IFUNDEF] cross
\ : X ;
\ [THEN]
\ sources
$0 Constant PC $1 Constant PC+2
$2 Constant PC+4 $3 Constant PC+6
$8 Constant ACCU $9 Constant SF
$A Constant ZF $C Constant CF
\ destinations
$0 Constant JMP $1 Constant JS
$2 Constant JZ $4 Constant JC
$7 Constant *ACCU
( $8 Constant ACCU ) $9 Constant SUB
( $A Constant SUBR ) $B Constant ADD
$C Constant XOR $D Constant OR
$E Constant AND $F Constant SHR
$FFFC Constant txd
$FFFF Constant rx?
$FFFE Constant rxd
\ $FFF0 Constant tx
: end-label previous ;
Create marks $10 cells allot
: ahere X here 2/ ;
: m ( n -- ) cells marks + ahere 2* swap ! 0 ;
: r ( n -- ) cells marks + @ ahere swap s" !" evaluate 0 ;
\ intel hex dump
: 0.r ( n1 n2 -- ) 0 swap <# 0 ?DO # LOOP #> type ;
: tohex ( dest addr u -- ) base @ >r hex
." :" swap >r >r
r@ dup 2 0.r over 4 0.r ." 00"
over 8 rshift + +
r> r> swap bounds ?DO I ( 1 xor ) c@ dup 2 0.r + LOOP
negate $FF and 2 0.r r> base ! ;
: 2hex ( dest addr u -- )
BEGIN dup WHILE
>r 2dup r@ $10 min tohex cr
r> $10 /string 0 max rot $10 + -rot
REPEAT drop 2drop ;
\ : sym
\ base @ >r hex
\ cr ." sym:s/PC=" ahere 4 0.r ." /" bl word count type ." /g" cr
\ r> base ! ;
: sym bl word drop ;
: label
>in @ bl word count X here symentry >in !
ahere Constant ;
: code
-1 ABORT" Need end-code or end-label before a new code definition" ;
also forth definitions
: label also assembler label ;
: (code) also assembler ;
: (end-code) previous ;
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