Sinclair ZX80 / ZX81 / Z88 Forums

This issue around the holidays, is what we call: White Christmas.

Why not go full 64k with battery backed up RAM? It’s even possible to replace ROM area with RAM, so you can load your own custom ROMs.

https://web.archive.org/web/20210224003 ... mories.htm

If you don’t want to soldier you can get this modern external RAM board:

https://www.ebay.co.uk/itm/116017640518

I have several storage options. But if you have an Arduino, you just upload the firmware for TZXduino, and connect the output pin for Ear to the ZX81. That pulses 5V to the ZX81 from an SD card. That works flawlessly. So find anything that can send outputs that pulses from 0V and 5V. It needs to be ...

msknight wrote: ↑Thu Dec 21, 2023 1:30 pm The ZX-Wespi requires Windows to do some of the work, and I'm a Linux user, so couple that with my minimal electronics experience that's down the list of options.

I've programmed my ZX-Wespi on a Mac.

As a ZXpand might be difficult to get hold of, and import to the UK might be a problem, I would suggest adding a ZX-Wespi to your Zeddy. You'll only need a cheap ESP32 microcontroller and a few resistors and a capacitor. This device stores your programs into the microcontrollers Flash, and you can u...

8008guy wrote: ↑Wed Dec 20, 2023 4:02 am In any case I am still looking for the rom code for the fd-zx. They seem to be rare,I hope someone archived the rom.

Maybe

XavSnap wrote: ↑Mon Dec 11, 2023 9:36 pm XavSnap

has come across this firmware.

Thank you for your e-postcard. Marry K-mas to you too.

Yes. It sounded much alike.

Sounds like the Microsoft Sound System or the parallel port “sound card” I had for my 286 back in the day. I was able to listen to 4 channel SoundTracker files in DOS.