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 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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