loop

[lonelyjohner]

Is there any thing like the "for" loop I could use in DHL to save some trouble repetitively inputting code?

[cadet1620]

lonelyjohner wrote

Is there any thing like the "for" loop I could use in DHL to save some trouble repetitively inputting code?

There are no looping constructs in HDL. You will need to have one line for each bit in the Xxx16.hdl files.

Hint: it is fastest to write a line like
    Xyz(a=a[], b=b[], out=out[]);
and copy it 15 times. Then you can quickly run down the columns, starting with the rightmost column, inserting the bit numbers.

--Mark

[lonelyjohner]

Yes..And that was exactly what I did to the 8-way scenarios.. When it comes to 16-way the code could go crazy..

[cadet1620]

[Oops -- we're talking about 8-Way, 16-Way, etc not Xxx16. ignore this; correct post in a minute or to.]

Are you trying to write everything with Nands? The 16Ways should just be 16 uses of their corresponding simple gate.

--Mark

[cadet1620]

You are right, Or8Way is a lot of typing.

The other nWays (2 muxes and 2 demuxes) can be easily handled with abstraction by using 2-way muxes to build their 4-ways, and a combination of 2- and 4-ways to build their 8-ways. They can be as short as 3 lines of code.

--Mark

[lonelyjohner]

No, I used Or and And gate, etc. But still, it is a lot of work.

At 2013-12-28 22:45:50,"cadet1620 [via Nand2Tetris Questions and Answers Forum]" <[hidden email]> wrote:

Are you trying to write everything with Nands? The 16Ways should just be 16 uses of their corresponding simple gate.

--Mark

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