6809 Forth assembler

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1 total messages Started by anderson Thu, 02 Aug 1984 18:30

#119

Author: anderson
Date: Thu, 02 Aug 1984 18:30

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<>
Since nobody had a 6809 assembler in Forth, I wrote one.  If anyone
would like a copy, mail me.

Is anyone else running Forth on the 6809?  It's a good combination.
The public domain fig-Forth for the 6809 is not so great; for example,
its "*" (16x16->16 multiply) does shift 'n add to get a 32 bit product,
then drops the high word.  Close to 1000 cycles.  Using the 6809's MUL
instruction, you can cut this down considerably (83 cycles for the
unsigned version).

David Anderson  (..uwvax!anderson)

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