I find the following helpful as it allows redefining words in the precompiled
portion of the system:

: MAKE: ( -- ) ( Redefines given word with given def.)
  ' $E9 OVER +ORIGIN C! \ Patch with a JMP opcode
  1+ >R :NONAME \ Compile new def.
  R> SWAP OVER CELL+ - \ Compute delta
  SWAP +ORIGIN ! ; \ Store JMP Address

Example:

: test ." original" ;
MAKE: test ." redefined" ;

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Received on Wed Jan 17 2007 - 07:11:05 PST