https://animatedal.itch.io/zx81-penalty-shoot-out

Yesterday I went to a Facebook marketplace meetup to pick this up- an original, first batch ntsc zx81 with the original box, cords, and a bunch of software. 45 dollars. What a good day. First time even seeing one of these

Hey, about a month ago I have assembled a ZX-81+38 Rev 1.10. Since then I have tried to find the cause of the black screen. I already made a lot of measurements with a DMM and oscilloscope.

Along with the troubleshooting guide by Mahjongg2 on GitHub I used ChatGPT, because I couldn't reach him so far.

According to his troubleshooting guide I don't get nNOP pulses on U1. The EPROM (AT27C256R) is running code though because I looked at the address and data output pins and they all look ok.

Here's what I already did with ChatGPT:

https://chatgpt.com/share/69f1e500-acd0-8326-babf-a5d47d2c472c

Additional info:

I use all new Texas Instruments CD-Series logic ICs. I also use the 74HCU04 because as he stated it should work even better than the 74HC04. All the other are 74HC logic ICs. Not HCT.

I'm at my second attempt. The first was that the CPU and EPROM were getting warm, but I discarded that PCB and used a new one. So skip the part and look for were I started from the beginning in the chat.

Hi everyone,

We just launched our Kickstarter to fund a small-batch production run of our ZX81-inspired MX keycap set.

These use UV-printed legends on MX JWA PBT keycaps, designed to capture the look of the original ZX81 while fitting modern mechanical keyboards.

Here’s the Kickstarter link if you want to check it out:
https://www.kickstarter.com/projects/1225158274/kilozed-zx81-inspired-keycaps-for-modern-mechanical-keyboar

Happy to answer any questions,thanks for taking a look =D

Found these whilst clearing out old stock from a record shop.

Is there anyone maintaining a historical archive of such things?

Otherwise I am not sure what to do with them.

completely unexpected and absolutely wonderful customer service. a real credit to the scene. thank you.

I'm sure you're all familiar with this version of H.E.R.O. but I only recently discovered it. It plays quite well, and plays well on emulators and my MiSTer.

https://www.youtube.com/shorts/Z0eF3L9nWIM

Very simple Roguish like, survive the Rogue Abyss.

Pick food to heal, avoid poisoned walls, pick the gold.

Fight the orks!

https://lupoman.itch.io/rogueabyss81

Survive in the radioactive maze, avoid walls, pick Health kits!

Use 'O' and 'P' keys to move the player left and right.

Made in ten lines with less than 80 chars per line.

https://lupoman.itch.io/survivor81