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Annotation of gforth/asm/basic.fs, revision 1.2

1.1       pazsan      1: \ asmbasic.fs basic assebmler definitions
                      2: 
                      3: [IFUNDEF] assembler Vocabulary assembler [THEN]
1.2     ! pazsan      4: require ./target.fs
1.1       pazsan      5: [IFUNDEF] chained require chains.fs [THEN]
                      6: 
                      7: \ ---------- Basic Definitions
                      8: 
                      9: \ (code) and (end-code) are used from interpreter or cross-compiler
                     10: \ Between (code) and (end-code) must be finished cpu-instructions
                     11: \ asm[ ... ]asm should or can be used to interrupt assembling
                     12: \ mode while assembling, the words should switch off and on
                     13: \ the assembler vocabulary or a special pasring mode
                     14: \ When using ]asm asm[ a cpu instruction has not to be finished
                     15: 
                     16: defer ]asm             \ turns on assembler mode
                     17: defer asm[             \ turns off assebmler mode
                     18: 
                     19: defer (code)           \ starts up a assembler passage
                     20: defer (end-code)       \ ends an assembler passage
                     21: 
                     22: \ Chains
                     23: 
                     24: \ Numref registers in propper8 (to reset some flags) and in
                     25: \ end-code8 (for resolving)
                     26: \ propper should be executed before at assembling start
                     27: \ and when an intstruction is finished.
                     28: 
                     29: Variable code8         \ starts assembling
                     30: 0 code8 !
                     31: 
                     32: Variable end-code8     \ ends assembling
                     33: 0 end-code8 !
                     34: 
                     35: Variable propper8      \ clean up flags for new cpu instructions
                     36: 0 propper8 !
                     37: 
                     38: : propper propper8 chainperform ;
                     39: 
                     40: : ]asm-1
                     41:   also assembler
                     42:   get-order >r = ABORT" Assembler is activated!"
                     43:   r> 2 - 0 ?DO drop LOOP 
                     44:   ;                    ' ]asm-1 IS ]asm
                     45: 
                     46: : asm[-1
                     47:   also assembler
                     48:   get-order >r <> ABORT" Assembler isn't activated!"
                     49:   r> 2 - 0 ?DO drop LOOP 
                     50:   previous previous ;          ' asm[-1 IS asm[
                     51: 
                     52: : (code)-1
                     53: \ the next input is assebler code witch is stored at dp  
                     54:   ]asm
                     55:   propper
                     56:   code8 chainperform 
                     57:   ;                    ' (code)-1 IS (code)
                     58: 
                     59: : (end-code)-1
                     60: \ the next code are normal forth definitions
                     61:   end-code8 chainperform
                     62:   asm[ ;               ' (end-code)-1 IS (end-code)
                     63: 
                     64: \ for test purposes
                     65: 
                     66: [IFUNDEF] there
                     67: : code create (code) ;
                     68: : end-code (end-code) ;
                     69: [THEN]
                     70: 
                     71: also assembler also definitions forth
                     72: 
                     73: variable asm-current
                     74: 
                     75: : end-label (end-code) asm-current @ set-current ;
                     76: : end-macros previous previous asm-current @ set-current ;
                     77: 
                     78: \ Macros
                     79: 
                     80: : : : ;
                     81: : ; postpone ; ; immediate
                     82: 
                     83: : label there constant ;
                     84: : equ   constant ;
                     85: 
                     86: forth definitions
                     87: 
                     88: : start-macros  get-current asm-current ! also forth also assembler definitions ;
                     89: : label         (code) label ;
                     90: 
                     91: previous previous