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Annotation of gforth/arch/misc/asm.fs, revision 1.5

1.1       pazsan      1: \ PIE MISC assembler
                      2: 
                      3: Vocabulary assembler
                      4: also assembler also definitions forth
1.4       jwilke      5: \ [IFUNDEF] cross
                      6: \ : X ;
                      7: \ [THEN]
1.1       pazsan      8: 
                      9: \ sources
                     10: 
                     11: $0 Constant PC         $1 Constant PC+2
                     12: $2 Constant PC+4       $3 Constant PC+6
                     13: 
                     14: $8 Constant ACCU       $9 Constant SF
                     15: $A Constant ZF         $C Constant CF
                     16: 
                     17: \ destinations
                     18: 
                     19: $0 Constant JMP                $1 Constant JS
                     20: $2 Constant JZ         $4 Constant JC
                     21: 
1.3       pazsan     22: $7 Constant *ACCU
1.1       pazsan     23: ( $8 Constant ACCU )   $9 Constant SUB
1.2       pazsan     24: ( $A Constant SUBR )   $B Constant ADD
1.1       pazsan     25: $C Constant XOR                $D Constant OR
                     26: $E Constant AND                $F Constant SHR
                     27: 
1.4       jwilke     28: $FFFC Constant txd
                     29: $FFFF Constant rx?
                     30: $FFFE Constant rxd
1.1       pazsan     31: \ $FFF0 Constant tx
                     32: 
                     33: : end-label previous ;
                     34: 
                     35: Create marks $10 cells allot
                     36: 
1.4       jwilke     37: : ahere X here 2/ ;
1.1       pazsan     38: 
                     39: : m ( n -- ) cells marks + ahere 2* swap ! 0 ;
                     40: : r ( n -- ) cells marks + @ ahere swap s" !" evaluate 0 ;
                     41: 
                     42: \ intel hex dump
                     43: 
                     44: : 0.r ( n1 n2 -- ) 0 swap <# 0 ?DO # LOOP #> type ;
                     45: 
                     46: : tohex ( dest addr u -- )  base @ >r hex
                     47:   ." :" swap >r >r
                     48:   r@ dup 2 0.r  over 4 0.r  ." 00"
                     49:   over 8 rshift + +
                     50:   r> r> swap bounds ?DO  I ( 1 xor ) c@ dup 2 0.r +  LOOP
                     51:   negate $FF and 2 0.r  r> base ! ;
                     52: 
                     53: : 2hex ( dest addr u -- )
                     54:   BEGIN  dup WHILE
                     55:          >r 2dup r@ $10 min tohex cr
                     56:          r> $10 /string 0 max rot $10 + -rot
                     57:   REPEAT  drop 2drop ;
                     58: 
1.4       jwilke     59: \ : sym 
                     60: \    base @ >r hex
                     61: \    cr ." sym:s/PC=" ahere 4 0.r ." /" bl word count type ." /g" cr
                     62: \    r> base ! ;
                     63: : sym bl word drop ;
                     64: 
                     65: : label 
                     66:   >in @ bl word count X here symentry >in !
                     67:   ahere Constant ;
1.1       pazsan     68: 
1.5     ! jwilke     69: : code
        !            70:   -1 ABORT" Need end-code or end-label before a new code definition" ;
        !            71: 
1.1       pazsan     72: also forth definitions
                     73: 
                     74: : label also assembler label ;
                     75: 
                     76: : (code) also assembler ;
                     77: : (end-code) previous ;
                     78: 
                     79: previous previous previous
1.4       jwilke     80: