Many decades ago, when I learned coding, I was also reading a (red) book on the programming the 8080 processor which was full of code listings and their description. I was in particular fascinated by the astronomical objects references in a text adventure similar to Invasion Force, with a central map, and some navigation control on the right, similar to the following screenshot:

Screenshot of Invasion Force TRS-80

I never played that game (I never had a computer with that processor), but I enjoyed reading the source code and its description. The idea was that you could travel around with your space craft (and non-realistic velocities, pun intended) and beside shooting other star ships, which was probably the actual goal, you had to avoid black holes, and make sure that once you are in a certain solar system, you are not too close to comets, etc. The later part was the thing I am after. There was some interesting distribution function in the code which randomly placed stars (with and without planets) into the game map, as well as comets, rogue planets, black holes (if I remember correctly).

Does anybody know more about the game and the astronomical objects occuring there? Or even about the red book with the programm code listings?

Losely related

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    $\begingroup$ Have you tried on the Retrocomputing stack? $\endgroup$
    – James K
    Aug 19 at 8:56
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    $\begingroup$ Here's what I would do, now that it's already here. This is pretty much not about Astronomy so it will eventually be closed as off-topic, at which point it can be migrated. But the longer it stays here the more chance that a gaming astronomer will see it and potentially add something. I think it will end up in Retrocomputing SE or Arqade (Gaming) SE and this will also give you a chance to decide on your preference. I think JamesK's suggestion of Retrocomputing is probably the best since this is "retro" and those folks don't give up. $\endgroup$
    – uhoh
    Aug 19 at 9:33
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    $\begingroup$ I’m voting to close this question because I got convinced, that it would be better to move to retrocomputing.stackexchange.com $\endgroup$
    – B--rian
    Aug 19 at 10:11
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    $\begingroup$ @uhoh Arqade unfortunately doesn't allow game identification questions (unless a screenshot is provided, which just means that they only allow 'how to do a reverse image search' questions) but Science Fiction & Fantasy does allow them and this would probably be on-topic there $\endgroup$
    – Aaron F
    Aug 19 at 10:11
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    $\begingroup$ @B--rian also here are some leads which might help you find the game: Trek, EGATrek, and, linked from that last article, Star Control 2 and Starflight - although those two are unlikely as they're graphical and you're looking for a text-based game. $\endgroup$
    – Aaron F
    Aug 19 at 10:23

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