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If I'm not wrong, Pitrex directly access to CRT beam control thru cart port and it controls how Vectrex display draws images, pausing own Vectrex CPU. That could be the reason why it's not possible to add audio directly on Vectrex, but it should be implemented directly on Pitrex allowing an alternative audio output on Pi card.

Don't ask me how, I mean... What amazing football matches I played with my brother in the 80's... He also was able to manage 3-4 players at the same time...

Don't ask me why but I used to do it as a kid, with a littler hand, and without any additional tool...

Yes, console can poll 11 button presses at the same time.

Other games that use full keypad, along with Soccer, are Maths 1 & 2, Chess 1 & 2, Musical Games, Golf, Hyperspace, Draughts, Inteligentz 3/Mastermind and Blackjack. And, for sure, the Hobby Module (you need to use the 2 keypads to have all 16 hexadecimal numbers and some input commands) There are some games that uses a few keys rather than "fire" ones like Metropolis/Hangman, Casino and Solitaire. I agree that Soccer/Football is really funny. If you learn how to control some players at the same time you can make an attack all together passing the ball between them in vertical.

Finally I got some update by email: " Dear customers, I am aware that you are eagerly waiting for the pre-ordered game "Hera Primera" for your Vectrex. And I am very sorry for that. I am also extremely dissatisfied with the delay. The game is poly.play's first Vectrex release and I would like to deliver the same quality standard as the releases for other systems. Unfortunately, there is a problem with this claim: The production of the overlay doesn't work out as it should. After the first printing company went bankrupt and the second one cancelled the order after some time, I found a small screen printing company in Leipzig/Germany that took on the project because they also find the topic exciting. Unfortunately, it turned out that the already purchased PETG material seems to be unsuitable. The print keeps throwing bubbles (see attached photo). Trials with different colors and chemical pre-cleaning have brought nothing. We now assume that we will not be able to implement it with this. New material samples have been ordered and further tests will start. But perhaps someone has experience with the subject and could give us tips on which material or colors are more suitable and even knows a source of supply. I would be pleased about feedback. There were requests if I could send the games without overlay. Unfortunately I would not like to do that, because I would like to send a complete product and also serve all customers at the same time. To show that everything is not vaporware, please find attached photos of the already finished modules, boxes and instructions. I apologize very much for the long waiting time. Also for the fact that I could not always respond to all requests in a timely manner. Since I do everything from production to the webshop to shipping and accounting on my own, I unfortunately often lack the time to take care of social media. And since I became a father again three weeks ago, there has been even less time since then. I ask for your understanding. Finally, I would like to thank you for making the realization of this project possible with your pre-order! However, if you do not want to wait any longer, please contact me. Then I will cancel the order and arrange a refund. Best reagrds, Sebastian Bach "

Thanks for advising

Still waiting my copy since I pre-ordered it on June... and no response to emails

This is normal in Commodore 64, but not on VIC20.

Amazing Derek! I will read and learn it

Seems like picture is OK, but cartridge is not being loaded correctly. Do you have any other game cartridge? If not, try to clean all contacts and review all PCB contacts of the cartridge connector.

I thought joysticks were analog but I was wrong, so check this post, maybe it could help:

Note that also German magazine Elektor published from Apr to Dec 1979 some articles and schematics explaining how to build and program a "TV Game Computer" that is quite similar to Interton/Radofin one, based on Signetics 2650A & 2636. Then, from Jan 1080 to Jul 1982 they published some other articles regarding this machine.

https://retrobitch.wordpress.com/2016/11/30/radical-felines-when-harassment-becomes-a-game/ Just fear