47 lines
771 B
Forth
47 lines
771 B
Forth
# EDA.forth
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## Description
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Forth EDA, ported to RETRO
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http://www.0xff.in/bin/A_Language_for_Digital_Design.pdf
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## Code & Commentary
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~~~
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#32768 'STATUS const
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#32767 'TIME const
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~~~
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### Digital logic simulator
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~~~
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:S. dup STATUS and n:-zero? [ '+ s:put ] if TIME and n:put ;
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:_ (n-n) STATUS xor ;
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:eda:and (nn-n) over TIME and over TIME and n:max rot STATUS and rot STATUS and and + ;
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:eda:or (nn-n) _ swap _ eda:and _ ;
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~~~
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### Technology
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~~~
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:2and (nn-n) eda:and _ #9 + ;
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:3or (nnn-n) eda:or eda:or #30 + ;
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:2xor (nn-n) over _ over eda:and [ _ eda:and ] dip eda:or #35 + ;
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~~~
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### Logic equations
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~~~
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#0 'A const
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#10 'B const
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#10 _ 'C const
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:enb_ (-n) A B 2xor ; (45)
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:xy (-n) enb_ C 2and A B 3or ; (+84)
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~~~
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## Test
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```
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enb_ S. nl
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xy S. nl
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```
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