Subj : Re: Day 6 of Advent of Code in Commodore 128 Basic
To   : ArcadeAge
From : Lawrence Woodman
Date : Fri Dec 14 2018 17:53:15

On Fri, 14 Dec 2018 05:21:40 -0800, ArcadeAge wrote:

> On Friday, December 14, 2018 at 12:30:49 PM UTC+1, ArcadeAge wrote:
>> On Friday, December 14, 2018 at 8:21:52 AM UTC+1, Lawrence Woodman wrote:
>> > Hello Commodore fans,
>> >
>> > You may have heard of the Advent of Code challenge.  For a bit of fun I
>> > decided to do day 6 of the challenge on the Commodore 128 using its built
>> > in Basic.  It took days to calculate but it was great to be able to
>> > complete it on this machine.
>> >
>> > I had to use Vice though as my real machine has a memory fault which I
>> > need to get around to solving.  The advantage of Vice was that
>> > I could easily transfer the code between the emulator and my Linux box to
>> > put it in a github repo and on my website.
>> >
>> > If you're interested here it is:
>> > https://techtinkering.com/articles/advent-of-code-2018-25-days-25-languages/#day6
>> >
>> I copied the code you published into VICE and was disappointed to get 
nothing but an OUT OF DATA ERROR IN 6050.
>> Trying to figure out what's missing, I realized that the site you linked to 
merely gives a tiny example that's already solved in place.
>> So I guess they give the additional problem data only to those who register 
(which I won't).
>> Does the challenge consist in writing a fully general solution to the 
mathematical problem? Or are they content if your program can solve the given 
major problem?
>> Would it be a lot of work to devise a problem instance that is too hard to 
solve by hand but still can be solved by a standard Commodore 128 within a few 
minutes?
>
> Ok, there are enough data, but line numbers are re-used, overwriting 
previously entered code. Easy to fix.
> VICE running at ~4000% -- faster than any SuperCPU, I guess.

I'm glad you noticed that.  I never noticed because I used petcat to
create the .PRG so it wasn't a problem.  I have just gone back and
changed the code.  Thanks.

4000% wow, my machine must be getting old, the most I've managed on
vice is about 480%.

Lorry

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